{"title":"Master Alloys","description":"","products":[{"product_id":"18k-pink-solder-master-alloys-easy-medium-hard","title":"Aleaciones de soldadura rosa: para hacer soldadura rosa de 18 quilates: fácil, media y dura","description":"Estas aleaciones de soldadura le permiten hacer su propia soldadura rosa de 18K. \u003cb\u003eEstas aleaciones no contienen oro.\u003c\/b\u003e Simplemente agregue oro fino al quilate correctamente: 75% oro fino + 25% aleación para oro de 18 quilates. Se vende por onza troy (20 DWT).\u003cbr\u003e\u003cbr\u003e\n\u003cfont color=\"#ff0000\"\u003eElija entre 3 tipos:\u003c\/font\u003e\u003cbr\u003e\n\u003cul\u003e\n\n\u003cli\u003e846-15SA \u003cb\u003e18K Rosa Fácil\u003c\/b\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e846-14SA \u003cb\u003e18K Rosa Medio\u003c\/b\u003e\n\n\u003c\/li\u003e\n\n\u003cli\u003e846-13SA \u003cb\u003e18K Rosa duro\u003c\/b\u003e\n\n\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"Otto Frei","offers":[{"title":"18K Pink Hard","offer_id":47561549512918,"sku":"846-13SA","price":21.4,"currency_code":"USD","in_stock":true},{"title":"18K Pink Medium","offer_id":47557337481430,"sku":"846-14SA","price":22.7,"currency_code":"USD","in_stock":true},{"title":"18K Rosa Fácil","offer_id":43557692899542,"sku":"846-15SA","price":24.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/pink-solder-alloys-for-making-18k-pink-solder-easy-medium-and-hard-otto-frei.jpg?v=1719958951"},{"product_id":"white-9-18k-investment-casting-master-alloy-nickel-based-per-troy-ounce","title":"Aleación blanca de 10-18 quilates para fundición\/rotación","description":"\u003cp\u003e Esta aleación blanca tiene una base de níquel y se vende por onza troy (20 pennyweights o 31,1 gramos).\u003c\/p\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43581633790166,"sku":"846-100","price":7.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/white-9-18-investment-casting-master-alloy-per-troy-ounce-20dwt-otto-frei.jpg?v=1719957479"},{"product_id":"ultra-white-10-18k-nickel-based-fabrication-casting-master-alloy-per-troy-ounce","title":"Blanco medio para hacer aleación de fabricación blanca de 9-18 quilates","description":"Esta aleación de fabricación de color blanco medio tiene una base de níquel y contiene algo de plata. No contiene oro. Adecuado para hacer aleaciones de oro blanco de 9K a 18K. Agregue oro fino para producir un producto karateado. Esta es una aleación de fabricación recomendada para hacer alambres y láminas. También se puede lanzar. Se vende por onza troy (20 DWT).","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43581634052310,"sku":"846-103","price":8.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/ultra-white-for-making-10-18-white-multi-purpose-alloy-per-troy-ounce-20-dwt-otto-frei.jpg?v=1719957479"},{"product_id":"dark-yellow-casting-master-alloy-9k-14k","title":"Amarillo profundo: para hacer aleación de fundición de 10-14K","description":"Se vende por onza troy (20 pennyweights o 31,1 gramos).","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43581634183382,"sku":"846-128","price":26.9,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/dark-yellow-9-14-investment-casting-master-alloy-for-stone-in-place-casting-per-troy-ounce-20-dwt-otto-frei.jpg?v=1719957479"},{"product_id":"yellow-casting-master-alloy-10-14k","title":"Amarillo estándar: para hacer aleación de fundición de 10-14K","description":"Más cobre, menos plata que 846-134, produciendo un amarillo más oscuro para 14K. Color clásico de Hamilton. Se vende por onza troy (20 pennyweights o 31,1 gramos).","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43581634511062,"sku":"846-132","price":26.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/standard-yellow-9-14-investment-casting-master-alloy-per-troy-ounce-20dwt-otto-frei.jpg?v=1719957479"},{"product_id":"light-yellow-9-14k-investment-casting-master-alloy-per-troy-ounce","title":"Amarillo verde: para hacer aleación de fundición de 10-18K","description":"Nuestra aleación de fundición más popular. Color amarillo claro medio cuando se usa para 14K. Se vende por onza troy (20 pennyweights o 31,1 gramos).\u003cul\u003e\n\u003cli\u003e 18% astilla\u003c\/li\u003e\n\u003cli\u003e 18% zinc\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43581634969814,"sku":"846-134","price":30.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/light-yellow-9-14-investment-casting-master-alloy-per-troy-ounce-20dwt-otto-frei.jpg?v=1719957479"},{"product_id":"ultra-white-9-18-investment-casting-master-alloy","title":"Aleación de fundición blanca de 10-18 quilates","description":"\u003cul\u003e\n\u003cli\u003e Sin aleación de plata y blanco níquel solo para fundición\u003c\/li\u003e\n\u003cli\u003e Vendido por onza troy (20 pennyweights o 31,1 gramos)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43581635199190,"sku":"846-140","price":9.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/ultra-white-9-18-investment-casting-master-alloy-otto-frei.jpg?v=1719957478"},{"product_id":"ultra-white-nickel-master-alloy-14k-18k-white-gold-fabrication-per-troy-ounce","title":"Ultra blanco para hacer aleación de fundición blanca de 14-18 quilates","description":"Ultra White, bajo contenido de níquel, alta resistencia a la tracción, contiene algo de plata. No contiene oro. Recomendado para fabricar aleaciones blancas de 14K a 18K aptas para fundición. Es bueno para el engaste de piedra, pero su alta resistencia a la tracción lo hace inadecuado para la fabricación y el laminado. Se vende por onza troy (20 DWT).","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43581635395798,"sku":"846-141","price":10.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/ultra-white-14-18-fabrication-master-alloy-per-troy-ounce-otto-frei.jpg?v=1719957478"},{"product_id":"dark-pink-rose-9-18-master-alloy-troy-ounce","title":"Rosa-rosa-para hacer aleación de fundición 10-14K","description":"\u003cul\u003e\n\u003cli\u003e El cobre lo hace rosado, pero también lo hace menos manejable para el fraguado.\u003c\/li\u003e\n\u003cli\u003e Vendido por onza troy (20 pennyweights o 31,1 gramos)\u003c\/li\u003e\n\n\u003cli\u003eAgregue oro fino para hacer su propia aleación de fundición de oro\u003c\/li\u003e\n\n\u003cli\u003eLa aleación no contiene oro.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43581638377686,"sku":"846-150","price":17.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/dark-pink-rose-9-18-all-purpose-master-alloy-sold-by-the-troy-ounce-20dwt-otto-frei.jpg?v=1719957478"},{"product_id":"rich-yellow-stone-in-place-casting-master-alloy","title":"Peach Klondike para hacer aleación de fundición 10-18K","description":"\u003cul\u003e\n\u003cli\u003e Alto contenido en cobre, amarillo rojizo, muy duro\u003c\/li\u003e\n\u003cli\u003e Vendido por onza troy (20 pennyweights o 31,1 gramos)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43581638705366,"sku":"846-158","price":39.8,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/rich-yellow-9-14-investment-casting-stone-in-place-master-alloy-per-troy-ounce-20dwt-otto-frei.jpg?v=1719957478"},{"product_id":"green-yellow-9-18-investment-casting-master-alloy-troy-ounce","title":"Verde claro para hacer aleación de fundición amarilla 10-18K","description":"\u003cul\u003e \u003cli\u003eEl alto contenido de plata del 82,5% lo convierte en oro amarillo verdoso.\u003c\/li\u003e\n\u003cli\u003e Vendido por onza troy (20 pennyweights o 31,1 gramos)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43581638901974,"sku":"846-184","price":119.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/green-yellow-9-18-investment-casting-master-alloy-per-troy-ounce-otto-frei.jpg?v=1719957478"},{"product_id":"rich-yellow-18k-casting-master-alloy","title":"Euro amarillo para hacer aleación de fundición de 18K","description":"\u003cul\u003e\n\u003cli\u003e Amarillo más oscuro, menos plateado que la mayoría de las aleaciones de 18k\u003c\/li\u003e\n\u003cli\u003e Vendido por onza troy (20 pennyweights o 31,1 gramos)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43581639131350,"sku":"846-175","price":72.98,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/rich-yellow-18-22-investment-casting-master-alloy-per-troy-ounce-20dwt-otto-frei.jpg?v=1719957474"},{"product_id":"copper-casting-grain-999-pure-troy-ounce","title":"Grano de fundición de cobre","description":"\u003cp\u003e Grano de cobre puro .999 duro a fino utilizado para aleaciones con oro y plata. Se vende por onza troy (20 pennyweights o 31,1 gramos).\u003c\/p\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43581639590102,"sku":"846-90","price":4.1,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/copper-casting-grain-otto-frei.jpg?v=1719957474"},{"product_id":"brass-casting-grain-troy-ounce","title":"Grano de fundición de latón vendido por onza troy","description":"\u003cp\u003e Ideal para líneas de muestra, nuestro grano de fundición de latón es una aleación de cobre y zinc y nada más. Compramos nuestro grano de fundición de latón a un fabricante de productos de metales preciosos con sede en la Costa Este que se enorgullece de suministrar aleaciones puras para fabricar joyas que cumplen con las leyes relativas al contenido de plomo, mercurio y níquel. Se vende por onza troy (20 pennyweights o 31,1 gramos).\u003c\/p\u003e \u003cp\u003eLa temperatura de fusión para la fundición es de 1922 °F (1005 °C).\u003c\/p\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43581640081622,"sku":"846-91","price":5.31,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/brass-casting-grain-sold-by-the-troy-ounce-otto-frei.jpg?v=1719957474"},{"product_id":"rich-yellow-18-22k-master-alloy-fabricating-casting","title":"Amarillo intenso de 10 a 22 quilates para fabricación\/estampado","description":"\u003cul\u003e\n\n\u003cli\u003eEspecialmente formulado para granulación, sin desoxidante\u003c\/li\u003e\n\n\u003cli\u003eColor amarillo profundo y rico.\u003c\/li\u003e\n\n\u003cli\u003eExcelente para la fabricación de láminas, alambres y tubos.\u003c\/li\u003e\n\n\u003cli\u003eMejor como una aleación de 18K\u003c\/li\u003e\n\n\u003cli\u003eLo mejor para la fabricación, pero también se puede moldear\u003c\/li\u003e\n\n\u003cli\u003eVendido por onza troy (20 pennyweights o 31,1 gramos)\u003c\/li\u003e\n\n\n\u003c\/ul\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43581640245462,"sku":"846-175ND","price":91.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/rich-yellow-18-22-investment-casting-and-fabricating-master-alloy-suitable-for-granulation-per-troy-ounce-20dwt-otto-frei.jpg?v=1719957474"},{"product_id":"manganese-bronze-casting-alloy","title":"Aleación de fundición de bronce de manganeso por libra","description":"Jewelers Manganese Bronze es una aleación de fundición desarrollada para proporcionar ruedas de joyería con un metal base que se puede moldear por centrifugación y vacío. Esta aleación tiene un rango de vertido entre 1700°F y 2100°F y tendrá un color amarillo limón brillante cuando se termine correctamente. Esta es una aleación patentada que contiene aproximadamente un 60 % de cobre (Cu), aproximadamente un 35 % de zinc (Zn) y pequeñas cantidades de otros metales.","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43581652336854,"sku":"143.301","price":28.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/manganese-bronze-casting-alloy-by-the-pound-otto-frei.jpg?v=1719957470"},{"product_id":"re-cast-it-gold-casting-additive-2oz","title":"2 onzas Pack-Re-Cast-It Gold Alloy Refresher-Replenisher","description":"Re-Cast-It es un aditivo de aleación que se utiliza para fundir oro viejo o chatarra.\nRe-Cast-It no contiene oro ni está diseñado para sustituir el oro.\nLos mejores resultados se obtienen cuando se mezcla con oro amarillo. Se vende en un paquete de 2 onzas troy (40 Pennyweight)\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e Limpia fundiciones de oro viejo dándole un aspecto de oro nuevo amarillo brillante\u003cbr\u003e Ayuda a eliminar la porosidad\u003cbr\u003e Aumentar la fluidez del metal viejo.\u003cbr\u003e Elimina la coloración rojiza de la superficie comúnmente asociada con el yeso.\noro viejo\u003cbr\u003e\u003cbr\u003e Diseñado para desoxidar el oro usado durante la fundición. Debería obtener excelentes resultados siguiendo unas sencillas instrucciones impresas a continuación.\u003cbr\u003e\u003cbr\u003e \u003cb\u003eMEZCLA:\u003c\/b\u003e\u003cbr\u003e\u003cbr\u003e Para chatarra de 10K, agregue 5 DWT de Re-Cast It y 3,57 DWT de oro fino por cada 100 DWT de chatarra de 10K que se derrita.\u003cbr\u003e\u003cbr\u003e Para chatarra de 14K, agregue 2 DWT de Re-Cast It y 2,82 DWT de oro fino por cada 100 DWT de chatarra de 14K que se derrita.\u003cbr\u003e\u003cbr\u003e Para chatarra de 18 quilates, agregue 1 TPM de Re-Cast It y 3,0 TPM de oro fino por cada 100 TPM de chatarra de 18 quilates que se derrita.\u003cbr\u003e\u003cbr\u003e \u003cbr\u003ePara el oro blanco, se pueden usar las proporciones anteriores, pero el uso se limitará a una o dos veces debido al amarilleo del color blanco.\u003cbr\u003e\u003cbr\u003e Si Re-Cast se utiliza con mezclas de desecho y frescas en reutilización continua, utilice la mitad de las cantidades indicadas anteriormente. Esto evitará la acumulación excesiva de desoxidantes en el metal.\u003cbr\u003e\u003cbr\u003e \u003cb\u003eDERRITIENDO:\u003c\/b\u003e\u003cbr\u003e\u003cbr\u003e Coloque Re-Cast It en el fondo del crisol cuando se derrita, con restos encima. Cuando la mezcla se vuelva fluida, revuelva con una varilla de carbón o de cuarzo para limpiar la superficie de cualquier óxido producido. El fundente puede ser necesario dependiendo de la condición del oro viejo. Recomendamos Ácido Bórico. Re-Cast Funcionará mejor cuando el metal viejo esté limpio de óxidos superficiales pesados ​​y polvo de revestimiento. Si el metal está contaminado con óxido cuproso (el óxido de color rojo), solo se pueden esperar resultados positivos limitados.\u003cbr\u003e\u003cbr\u003e\u003cbr\u003e \u003cb\u003e\u003cfont color=\"#ff0000\"\u003eNOTA: Use varillas de carbón solo con horno a gas o fusión con soplete. Se deben usar varillas de cuarzo para todas las fusiones por inducción eléctrica.\u003c\/font\u003e\u003c\/b\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43581682254038,"sku":"122.607","price":26.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/2-ounce-pack-re-cast-it-gold-alloy-refresher-replenisher-otto-frei.jpg?v=1719957457"},{"product_id":"dark-pink-rose-9-18k-fabrication-rolling-master-alloy-no-de-ox","title":"Pink Rose 10-14K Fabricación Aleación rodante No De-Ox","description":"El cobre lo hace rosado, pero también lo hace menos manejable para el engaste y la fabricación. Esta aleación no tiene De-Ox. Esa es la única diferencia entre esta aleación rosa para fabricación y nuestra otra aleación rosa para fundición. El De-Ox está en aleación de fundición para proteger la aleación durante la fundición. El aditivo De-Ox hace que las aleaciones de fundición sean un poco quebradizas y difíciles de trabajar para la fabricación. Por lo tanto, ningún De-Ox en esta aleación hace que sea más fácil de fabricar que la aleación de fundición rosa 846-150. Eso no significa que esta aleación sea fácil de fabricar, solo que esta aleación rosa es mejor para la fabricación que la aleación rosa para fundición. Tal es el problema de hacer que el oro se vea rosado.\u003cbr\u003e\u003cbr\u003e Vendido por onza troy (20 pennyweights o 31,1 gramos)","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43582909448406,"sku":"846-151ND","price":19.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/dark-pink-rose-9-18k-fabrication-rolling-master-alloy-per-troy-ounce-20dwt-otto-frei.jpg?v=1719956810"},{"product_id":"yellow-14k-18k-enameling-master-alloy-no-zinc","title":"Amarillo intenso All Enameling Alloy 80E sin zinc","description":"\u003cul\u003e\n\u003cli\u003e Amarillo intenso All Enameling Alloy 80E sin zinc\u003c\/li\u003e\n\n\u003cli\u003e\u003cbr\u003e\u003c\/li\u003e\n\u003cli\u003eVendido por onza troy (20 pennyweights o 31,1 gramos)\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43583688999126,"sku":"846-180","price":86.65,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/rich-yellow-all-enameling-alloy-80e-no-zinc-otto-frei.jpg?v=1719956544"},{"product_id":"ultra-rich-reddish-yellow-master-alloy-9k-14k-stone-in-place-casting","title":"Ultra Rich Reddish Yellow 9-14 Investment Casting Stone In Place Master Alloy-Contains No Gold Per Troy Ounce (20 DWT)","description":"\u003cp\u003eThe Ultra Rich Reddish Yellow Master Alloy is a high-performance investment casting alloy engineered for stone-in-place casting applications. Part of the Ultra Line of casting alloys, this master alloy produces a rich reddish yellow color when combined with fine gold to yield alloys in the 9K–14K range. It features notably high silver content, contributing to its excellent tarnish resistance and casting reusability. This alloy contains no gold and is sold by the troy ounce.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePart of the \u003cstrong\u003eUltra Line\u003c\/strong\u003e of high-performance casting alloys\u003c\/li\u003e\n\u003cli\u003eFormulated for \u003cstrong\u003estone-in-place investment casting\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eProduces a \u003cstrong\u003erich reddish yellow\u003c\/strong\u003e color when alloyed with fine gold\u003c\/li\u003e\n\u003cli\u003eCompatible with alloy targets in the \u003cstrong\u003e9K–14K\u003c\/strong\u003e range\u003c\/li\u003e\n\u003cli\u003eHigh silver content for enhanced tarnish resistance\u003c\/li\u003e\n\u003cli\u003eHigh reusability for efficient production workflows\u003c\/li\u003e\n\u003cli\u003eContains no gold\u003c\/li\u003e\n\u003cli\u003eProprietary metals are included in the formulation; may also contain silicon or other elements\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eAlloy Line\u003c\/th\u003e\n\u003ctd\u003eUltra Line High Performance Casting Alloys\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApplication\u003c\/th\u003e\n\u003ctd\u003eStone-in-place investment casting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eColor (when alloyed with fine gold)\u003c\/th\u003e\n\u003ctd\u003eRich reddish yellow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTarget Karat Range\u003c\/th\u003e\n\u003ctd\u003e9K–14K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGold Content\u003c\/th\u003e\n\u003ctd\u003eNone (contains no gold)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eComposition – Copper (Cu)\u003c\/th\u003e\n\u003ctd\u003e65%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eComposition – Silver (Ag)\u003c\/th\u003e\n\u003ctd\u003e23%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eComposition – Zinc\u003c\/th\u003e\n\u003ctd\u003e12%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAdditional Elements\u003c\/th\u003e\n\u003ctd\u003eProprietary metals; may also contain silicon and other elements\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSold By\u003c\/th\u003e\n\u003ctd\u003eTroy ounce (20 pennyweights \/ 31.1 grams)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cp\u003eThe composition listed reflects the primary declared elements. Proprietary metals are present in the formulation and are not fully disclosed. The alloy may also contain silicon or other elements not listed in the composition breakdown.\u003c\/p\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":44245842657494,"sku":"846-101U","price":39.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/ultra-rich-reddish-yellow-9-14-investment-casting-stone-in-place-master-alloy-contains-no-gold-per-troy-ounce-20-dwt-otto-frei.jpg?v=1719954196"},{"product_id":"bright-yellow-master-alloy-9k-14k-investment-casting-troy-ounce","title":"Bright Yellow 9-14 Investment Casting Master Alloy-Contains No Gold Per Troy Ounce (20 DWT)","description":"\u003cp\u003eThis bright yellow master alloy is formulated for investment casting and open torch melting, producing a vivid yellow color when alloyed with fine gold to yield karat gold between 9K and 14K. It features a low silver content compared to many gold alloys, and its high reusability makes it an economical choice for production casting environments. Sold by the troy ounce (20 pennyweights \/ 31.1 grams).\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eProduces a \u003cstrong\u003ebright yellow\u003c\/strong\u003e color when combined with fine gold\u003c\/li\u003e\n\u003cli\u003eSuitable for alloying to \u003cstrong\u003e9K–14K\u003c\/strong\u003e gold\u003c\/li\u003e\n\u003cli\u003eOptimized for \u003cstrong\u003einvestment casting\u003c\/strong\u003e and \u003cstrong\u003eopen torch melting\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003cli\u003eHigh reusability—economical for repeated casting cycles\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLow silver content\u003c\/strong\u003e compared to many gold master alloys\u003c\/li\u003e\n\u003cli\u003eContains no gold—priced per troy ounce of alloy only\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eComposition\u003c\/th\u003e\n\u003ctd\u003eCopper (Cu) 73.75%, Silver (Ag) 11.25%, Zinc (Zn) 15%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eAdditional Elements\u003c\/th\u003e\n\u003ctd\u003eMay contain proprietary metals, silicon, and other elements not listed in the composition\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGold Content\u003c\/th\u003e\n\u003ctd\u003eContains no gold\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eKarat Range\u003c\/th\u003e\n\u003ctd\u003e9K–14K (when alloyed with fine gold)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eColor Result\u003c\/th\u003e\n\u003ctd\u003eBright yellow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMelting Method\u003c\/th\u003e\n\u003ctd\u003eOpen torch; investment casting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSold By\u003c\/th\u003e\n\u003ctd\u003eTroy ounce (20 pennyweights \/ 31.1 grams)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cp\u003eThe composition listing (Cu, Ag, Zn) does not represent the complete formulation. Proprietary metals are present in the alloy and are not disclosed. The alloy may also contain silicon or other trace elements. Always follow safe handling practices when melting and casting alloy materials.\u003c\/p\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":44245842690262,"sku":"846-200","price":24.2,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/bright-yellow-9-14-investment-casting-master-alloy-contains-no-gold-per-troy-ounce-20-dwt-otto-frei.jpg?v=1719954196"},{"product_id":"european-greenish-yellow-master-alloy-9k-14k-investment-casting","title":"European Greenish Yellow 9-14 Investment Casting Master Alloy-Contains No Gold Per Troy Ounce (20 DWT)","description":"\u003cp\u003eThis European-shade master alloy is formulated for investment casting and delivers a distinctive \u003cstrong\u003egreenish yellow\u003c\/strong\u003e color when alloyed with fine gold — the traditional European interpretation of yellow gold. Suitable for producing alloys in the \u003cstrong\u003e9K to 14K\u003c\/strong\u003e range, it features a high silver content that contributes to its characteristic hue and working properties. It is noted for good reusability with torch casting.\u003c\/p\u003e\u003cp\u003eThe alloy is sold by the troy ounce (20 pennyweights \/ 31.1 grams) and contains no gold.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eProduces a greenish yellow color traditionally associated with European-shade yellow gold\u003c\/li\u003e\n\u003cli\u003eCompatible with fine gold for alloying in the 9K–14K range\u003c\/li\u003e\n\u003cli\u003eHigh silver content contributes to characteristic color and performance\u003c\/li\u003e\n\u003cli\u003eGood reusability; suitable for torch casting investment casting applications\u003c\/li\u003e\n\u003cli\u003eContains no gold — sold as a master alloy only\u003c\/li\u003e\n\u003cli\u003eSold by the troy ounce (20 DWT \/ 31.1 g)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eComposition – Copper (Cu)\u003c\/th\u003e\n\u003ctd\u003e57%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eComposition – Silver (Ag)\u003c\/th\u003e\n\u003ctd\u003e27.5%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eComposition – Zinc\u003c\/th\u003e\n\u003ctd\u003e15.5%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eGold Content\u003c\/th\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eColor Result\u003c\/th\u003e\n\u003ctd\u003eGreenish yellow (European shade)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eKarat Range\u003c\/th\u003e\n\u003ctd\u003e9K–14K (when alloyed with fine gold)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCasting Method\u003c\/th\u003e\n\u003ctd\u003eInvestment casting (torch)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSold By\u003c\/th\u003e\n\u003ctd\u003eTroy ounce (20 DWT \/ 31.1 g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cp\u003eThere are proprietary metals in the formulation that are not reflected in the composition listed above. The alloy may also contain other elements including silicon. The percentages shown represent the primary disclosed constituents only.\u003c\/p\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":44245842755798,"sku":"846-264","price":46.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/european-greenish-yellow-9-14-investment-casting-master-alloy-contains-no-gold-per-troy-ounce-20-dwt-otto-frei.jpg?v=1719954196"},{"product_id":"deep-yellow-790-18k-casting-master-alloy-troy-ounce","title":"Deep Yellow 18 Casting Master Alloy-Sold Per Troy Ounce (20DWT)","description":"\u003cp\u003eThe Deep Yellow 790 Casting Master Alloy delivers a deep, rich yellow color with a European style finish. Formulated specifically as an \u003cstrong\u003e18K casting alloy\u003c\/strong\u003e, it produces a smooth surface with high luster and contains a built-in de-oxidizer for cleaner casting results. Compared to the 846-175 Master Alloy, this formulation uses more copper and less silver, resulting in its characteristically warm, saturated yellow tone. It is \u003cstrong\u003enickel free\u003c\/strong\u003e and sold by the troy ounce (20 pennyweights or 31.1 grams).\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eDeep, rich yellow color with European style aesthetic\u003c\/li\u003e\n\u003cli\u003eSmooth surface finish with high luster\u003c\/li\u003e\n\u003cli\u003eIncludes a de-oxidizer in the formulation\u003c\/li\u003e\n\u003cli\u003eBest suited for use as an 18K casting alloy\u003c\/li\u003e\n\u003cli\u003eHigher copper content and lower silver content than the 846-175 Master Alloy\u003c\/li\u003e\n\u003cli\u003eNickel free formulation\u003c\/li\u003e\n\u003cli\u003eSold by the troy ounce (20 pennyweights \/ 31.1 grams)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eAlloy Color\u003c\/th\u003e\n\u003ctd\u003eDeep Yellow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRecommended Use\u003c\/th\u003e\n\u003ctd\u003e18K Casting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCopper (Cu)\u003c\/th\u003e\n\u003ctd\u003e53%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSilver (Ag)\u003c\/th\u003e\n\u003ctd\u003e44%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eZinc (Zn)\u003c\/th\u003e\n\u003ctd\u003e3%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNickel Free\u003c\/th\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDe-oxidizer Included\u003c\/th\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSold By\u003c\/th\u003e\n\u003ctd\u003eTroy ounce (20 DWT \/ 31.1 g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eThere are proprietary metals in the formulation that are not included in the composition section.\u003c\/strong\u003e The alloy may also contain other elements, including silicon. The percentages listed reflect the primary disclosed composition only.\u003c\/p\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":44245842821334,"sku":"846-790","price":65.3,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/deep-yellow-18-casting-master-alloy-sold-per-troy-ounce-20dwt-otto-frei.jpg?v=1726697568"},{"product_id":"greenish-yellow-18k-casting-master-alloy-nickel-free","title":"Greenish Yellow 18 Casting Master Alloy-Per Troy Ounce (20DWT)","description":"\u003cp\u003eThis \u003cstrong\u003eGreenish Yellow 18K Casting Master Alloy\u003c\/strong\u003e delivers a distinctive European-style greenish yellow color with the highest silver content of all 18K master alloys in its class. Formulated with a built-in de-oxidizer, it produces a smooth surface and high luster finish, making it an excellent choice for 18K casting applications. Completely \u003cstrong\u003enickel free\u003c\/strong\u003e, this alloy is well-suited for jewelers working with clients who have metal sensitivities. Sold by the troy ounce (20 pennyweights or 31.1 grams).\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGreenish yellow color with European-style aesthetic\u003c\/li\u003e\n\u003cli\u003eHighest silver content of all 18K master alloys in this line\u003c\/li\u003e\n\u003cli\u003eIncludes a built-in de-oxidizer for cleaner casting results\u003c\/li\u003e\n\u003cli\u003eSmooth surface and high luster finish\u003c\/li\u003e\n\u003cli\u003eNickel free formulation\u003c\/li\u003e\n\u003cli\u003eBest suited for use as an 18K casting alloy\u003c\/li\u003e\n\u003cli\u003eSold by the troy ounce (20 pennyweights \/ 31.1 grams)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eKarat\u003c\/th\u003e\n\u003ctd\u003e18K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eColor\u003c\/th\u003e\n\u003ctd\u003eGreenish Yellow\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCopper (Cu)\u003c\/th\u003e\n\u003ctd\u003e24%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSilver (Ag)\u003c\/th\u003e\n\u003ctd\u003e72.8%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eZinc (Zn)\u003c\/th\u003e\n\u003ctd\u003e3.2%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eNickel\u003c\/th\u003e\n\u003ctd\u003eNickel Free\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDe-oxidizer\u003c\/th\u003e\n\u003ctd\u003eIncluded in formulation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePrimary Use\u003c\/th\u003e\n\u003ctd\u003e18K Casting\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSold By\u003c\/th\u003e\n\u003ctd\u003eTroy ounce (20 pennyweights \/ 31.1 grams)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eImportant:\u003c\/strong\u003e There are proprietary metals in the formulation that are not listed in the composition section. The alloy may also contain other elements, including silicon.\u003c\/p\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":44245842886870,"sku":"846-760","price":103.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/greenish-yellow-18-casting-master-alloy-per-troy-ounce-20dwt-otto-frei.jpg?v=1726697569"},{"product_id":"premium-pink-9k-14k-casting-master-alloy-troy-ounce","title":"Premium Pink 9-14 Casting Master Alloy-Sold Per Troy Ounce (20DWT)","description":"\u003cp\u003e\u003cstrong\u003ePremium Pink 9–14K Casting Master Alloy\u003c\/strong\u003e is formulated for jewelers and casters who demand a rich, consistent pink color result in gold alloys ranging from 9K to 14K. Engineered for high fluidity, this alloy performs reliably in open melt systems, including both torch and electric melt setups. The result is a smooth surface with high luster — ideal for finished casting work where surface quality matters.\u003c\/p\u003e\u003cp\u003eThis alloy includes a built-in de-oxidizer, reducing the need for additional fluxing steps and helping produce cleaner castings. The formulation is designed as a true casting alloy, not a general-purpose master alloy, making it a precise tool for production and studio casting alike.\u003c\/p\u003e\u003cp\u003eSold by the troy ounce (20 pennyweights \/ 31.1 grams).\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eRich premium pink color result in 9K to 14K gold alloys\u003c\/li\u003e\n\u003cli\u003eHigh fluidity formula optimized for open melt systems\u003c\/li\u003e\n\u003cli\u003eCompatible with torch and electric melt processes\u003c\/li\u003e\n\u003cli\u003eIncludes a de-oxidizer in the formulation\u003c\/li\u003e\n\u003cli\u003eProduces smooth surface finish with high luster\u003c\/li\u003e\n\u003cli\u003eBest suited as a 9K to 14K casting alloy\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eRecommended Karat Range\u003c\/th\u003e\n\u003ctd\u003e9K – 14K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eColor Result\u003c\/th\u003e\n\u003ctd\u003ePremium Pink\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFluidity\u003c\/th\u003e\n\u003ctd\u003eHigh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMelt System Compatibility\u003c\/th\u003e\n\u003ctd\u003eOpen melt — torch and electric\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eDe-oxidizer Included\u003c\/th\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCopper (Cu)\u003c\/th\u003e\n\u003ctd\u003e95%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSilver (Ag)\u003c\/th\u003e\n\u003ctd\u003e3.5%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eZinc (Zn)\u003c\/th\u003e\n\u003ctd\u003e1.5%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eUnit of Sale\u003c\/th\u003e\n\u003ctd\u003ePer troy ounce (20 DWT \/ 31.1 g)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eProprietary metals are present in this formulation that are not disclosed in the composition listing above.\u003c\/strong\u003e The alloy may also contain other elements, including silicon. The listed percentages reflect primary constituents only and do not represent the complete formulation.\u003c\/p\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":44245842952406,"sku":"846-540","price":16.4,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/premium-pink-9-14-casting-master-alloy-sold-per-troy-ounce-20dwt-otto-frei.jpg?v=1726697571"},{"product_id":"pink-9k-18k-casting-fabricating-master-alloy-troy-ounce","title":"All Purpose Pink 9-18 Casting\/Fabricating Master Alloy-Sold Per Troy Ounce (20DWT)","description":"\u003cp\u003e\u003cstrong\u003eAll Purpose Pink 9–18 Casting \u0026amp; Fabricating Master Alloy\u003c\/strong\u003e is a versatile master alloy formulated to cover a wide range of duties in both casting and fabricating applications. Designed for use across gold alloys from 9K through 18K, this pink-toned alloy is a practical choice for jewelers and metalsmiths who need a single master alloy that performs reliably across multiple karat ranges.\u003c\/p\u003e\u003cp\u003eSold per troy ounce (20 pennyweights \/ 31.1 grams).\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eSuitable for both casting and fabricating workflows\u003c\/li\u003e\n\u003cli\u003eCompatible with gold alloys ranging from 9K to 18K\u003c\/li\u003e\n\u003cli\u003eProduces a pink color tone in finished alloys\u003c\/li\u003e\n\u003cli\u003eSold in convenient troy ounce (20 DWT \/ 31.1 g) units\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eComposition\u003c\/th\u003e\n\u003ctd\u003eCu 93%, Ag 4%, Zn 3% (see note)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eColor Tone\u003c\/th\u003e\n\u003ctd\u003ePink\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eKarat Range\u003c\/th\u003e\n\u003ctd\u003e9K–18K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eApplications\u003c\/th\u003e\n\u003ctd\u003eCasting, Fabricating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSold Per\u003c\/th\u003e\n\u003ctd\u003eTroy ounce (20 pennyweights \/ 31.1 grams)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eNote:\u003c\/strong\u003e This alloy contains proprietary metals not included in the composition listed above. It may also contain other elements, including silicon.\u003c\/p\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":44245843017942,"sku":"846-548","price":16.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/all-purpose-pink-9-18-castingfabricating-master-alloy-sold-per-troy-ounce-20dwt-otto-frei.jpg?v=1726697572"},{"product_id":"sterling-classic-white-alloy-925-master","title":"Sterling-Classic White Alloy","description":"\u003cp\u003eA general-purpose master alloy for alloying with pure silver to produce .925 sterling silver. Sterling-Classic White Alloy delivers a classic white color and is well suited for both casting and fabrication applications. Sold per troy ounce (20 pennyweights \/ 31.1 grams).\u003c\/p\u003e\u003cp\u003eThis alloy is formulated with less zinc and more copper compared to the Super White 846-597N alloy, making it a distinct choice for jewelers who prefer that specific balance of workability and finish.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eContains no silver.\u003c\/strong\u003e The alloy is heat treatable, exhibits high fluidity during casting, and offers good tarnish resistance.\u003c\/p\u003e\u003ch3\u003eFeatures\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eClassic white color for alloying with pure silver to .925 sterling silver\u003c\/li\u003e\n\u003cli\u003eSuitable for both casting and fabrication\u003c\/li\u003e\n\u003cli\u003eHeat treatable for improved hardness and workability\u003c\/li\u003e\n\u003cli\u003eHigh fluidity for clean, consistent casting results\u003c\/li\u003e\n\u003cli\u003eGood tarnish resistance for finished pieces\u003c\/li\u003e\n\u003cli\u003eLower zinc, higher copper content compared to Super White 846-597N alloy\u003c\/li\u003e\n\u003cli\u003eContains no silver — pure master alloy formulation\u003c\/li\u003e\n\u003cli\u003eSold per troy ounce (20 DWT \/ 31.1 grams)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eColor\u003c\/th\u003e\n\u003ctd\u003eClassic White\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eComposition – Copper (Cu)\u003c\/th\u003e\n\u003ctd\u003e69%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eComposition – Zinc (Zn)\u003c\/th\u003e\n\u003ctd\u003e30%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eComposition – Tin (Sn)\u003c\/th\u003e\n\u003ctd\u003e1%\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSilver Content\u003c\/th\u003e\n\u003ctd\u003eNone\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeat Treatable\u003c\/th\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFluidity\u003c\/th\u003e\n\u003ctd\u003eHigh\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTarnish Resistance\u003c\/th\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSold By\u003c\/th\u003e\n\u003ctd\u003eTroy ounce (20 pennyweights \/ 31.1 grams)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch3\u003eNotes\u003c\/h3\u003e\u003cp\u003eThere are proprietary metals in the formulation that are not included in the composition listing above. The alloy may also contain silicon and deoxidizers. Mix with pure silver to produce .925 sterling silver.\u003c\/p\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":44245843116246,"sku":"846-588","price":8.54,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/sterling-classic-white-alloy-otto-frei.jpg?v=1721164249"},{"product_id":"sterling-super-white-master-alloy-925-casting","title":"Sterling-Super White Alloy","description":"\u003cp\u003eSterling-Super White Alloy is a general-purpose master alloy designed for alloying with pure silver to produce .925 sterling silver. Suitable for both casting and fabrication, this alloy delivers a super white color result and is formulated with more zinc and less copper compared to the Classic White alloy (846-588). It contains no silver and is sold per troy ounce (20 pennyweights \/ 31.1 grams).\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSuper white color when alloyed with fine silver to .925 sterling\u003c\/li\u003e\n\u003cli\u003eSuitable for casting and fabrication applications\u003c\/li\u003e\n\u003cli\u003eHeat treatable for added versatility\u003c\/li\u003e\n\u003cli\u003eHigh fluidity for reliable casting performance\u003c\/li\u003e\n\u003cli\u003eGood tarnish resistance\u003c\/li\u003e\n\u003cli\u003eContains no silver — add to pure silver to achieve .925 sterling\u003c\/li\u003e\n\u003cli\u003eHigher zinc and lower copper content compared to Classic White 846-588\u003c\/li\u003e\n\u003cli\u003eMay also contain silicon and deoxidizers; formulation includes proprietary metals not fully disclosed in composition\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eComposition\u003c\/th\u003e\n\u003ctd\u003eCu 65%, Zn 35% (plus proprietary metals, may include silicon and deoxidizers)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSilver Content\u003c\/th\u003e\n\u003ctd\u003eNone — master alloy only\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTarget Alloy\u003c\/th\u003e\n\u003ctd\u003e.925 Sterling Silver\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eColor Result\u003c\/th\u003e\n\u003ctd\u003eSuper White\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSold By\u003c\/th\u003e\n\u003ctd\u003eTroy ounce (20 pennyweights \/ 31.1 grams)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHeat Treatable\u003c\/th\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eTarnish Resistance\u003c\/th\u003e\n\u003ctd\u003eGood\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cp\u003eThis alloy contains proprietary metals not fully listed in the composition breakdown. The formulation may also include silicon and deoxidizers. For a classic white result with a different Cu\/Zn ratio, refer to Classic White alloy 846-588.\u003c\/p\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":44245843181782,"sku":"846-597N","price":11.74,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/sterling-super-white-alloy-otto-frei.jpg?v=1719954189"},{"product_id":"ultra-white-9k-18k-stone-in-place-nickel-casting-master-alloy","title":"Ultra White 9K-18K Stone-In-Place Nickel Alloy","description":"\u003cp\u003eUltra White 9K–18K Stone-In-Place Investment Casting Master Alloy is formulated for excellent fluidity during casting and fabrication applications. \u003cstrong\u003eContains no gold.\u003c\/strong\u003e Sold by the troy ounce (20 pennyweights \/ 31.1 grams).\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eEngineered for stone-in-place investment casting with excellent metal fluidity\u003c\/li\u003e\n\u003cli\u003eCompatible with 9K through 18K gold formulations when pre-alloyed with fine gold\u003c\/li\u003e\n\u003cli\u003eSuitable for both casting and fabrication applications\u003c\/li\u003e\n\u003cli\u003eContains no gold — a true master alloy for alloying to karat\u003c\/li\u003e\n\u003cli\u003eGypsum bonded investment recommended for best results\u003c\/li\u003e\n\u003cli\u003eFluoride-based investment removers recommended for silicon oxide coating removal\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eComposition\u003c\/th\u003e\n\u003ctd\u003eCu 53%, Ag 20%, Zn 10%, Ni 17% (plus proprietary metals; may also contain silicon and deoxidizers)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eContains Gold\u003c\/th\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSold By\u003c\/th\u003e\n\u003ctd\u003eTroy ounce (20 pennyweights \/ 31.1 grams)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePre-Alloying Temperature (9K–18K)\u003c\/th\u003e\n\u003ctd\u003e1050°C – 1060°C \/ 1922°F – 1940°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCasting Temp – 10K Alloyed Grain\u003c\/th\u003e\n\u003ctd\u003e960°C – 980°C \/ 1760°F – 1796°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCasting Temp – 14K Alloyed Grain\u003c\/th\u003e\n\u003ctd\u003e985°C – 1005°C \/ 1805°F – 1841°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCasting Temp – 18K Alloyed Grain\u003c\/th\u003e\n\u003ctd\u003e980°C – 1000°C \/ 1796°F – 1832°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFlask Temperature\u003c\/th\u003e\n\u003ctd\u003e540°C – 675°C \/ 1004°F – 1247°F (varies by flask size, karat, and jewelry type)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuench Time\u003c\/th\u003e\n\u003ctd\u003e15–25 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003ePre-alloying with fine gold using aggressive stirring and fluxing is recommended to ensure a uniform mixture.\u003c\/li\u003e\n\u003cli\u003eUse very little boric acid flux. Do not use carbon flux such as soda ash or saltpeter. No flux is needed in a bottom-pour automatic casting unit.\u003c\/li\u003e\n\u003cli\u003eTo calculate the weight of metal needed (in grams), multiply density (g\/cc) by the weight of wax (grams), then add 10% for the button.\u003c\/li\u003e\n\u003cli\u003eAvoid aggressive acids for investment removal — use fluoride-based removers to prevent stress corrosion and surface damage.\u003c\/li\u003e\n\u003cli\u003eRecommended scrap mix: 60% fresh, 40% scrap. Note that white gold alloy has approximately one-third the reusability of yellow gold alloys.\u003c\/li\u003e\n\u003cli\u003eMelt temperature may vary depending on the type of casting unit used.\u003c\/li\u003e\n\u003cli\u003eProprietary metals are present in the formulation and are not fully disclosed in the composition data.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":44245843247318,"sku":"846-982","price":39.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/ultra-white-9k-18k-stone-in-place-nickel-alloy-otto-frei.jpg?v=1726697575"},{"product_id":"premium-white-9k-18k-silicon-free-casting-master-alloy-per-troy-ounce","title":"Premium White 9-18 Silicon Free Casting Master Alloy-Per Troy Ounce (20DWT)","description":"\u003cp\u003ePremium White 9–18 Silicon Free Casting Master Alloy is a professional-grade white gold master alloy formulated for both casting and fabrication applications. Sold by the troy ounce (20 pennyweights \/ 31.1 grams), this alloy contains no gold and is designed to be pre-alloyed with fine gold to produce white gold alloys from 9K through 18K. The formulation is noted as silicon free in its designation, though the manufacturer notes that proprietary metals, silicon, and deoxidizers may be present in the full composition.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eSuitable for casting and fabrication applications across 9K, 10K, 14K, and 18K white gold\u003c\/li\u003e\n\u003cli\u003ePre-alloying with fine gold is recommended, with aggressive stirring and fluxing to ensure uniform mixture\u003c\/li\u003e\n\u003cli\u003eBoric acid is the recommended flux; carbon fluxes and refining fluxes (soda ash, saltpeter, etc.) should be avoided\u003c\/li\u003e\n\u003cli\u003eAvoid flux in bottom-pour automatic casting units\u003c\/li\u003e\n\u003cli\u003eStandard investment removers are compatible for investment removal; aggressive acids are not recommended due to risk of stress corrosion and surface damage\u003c\/li\u003e\n\u003cli\u003eWhite gold alloy has approximately one-third the reusability of yellow gold alloys; a 70% fresh–30% scrap mix is recommended\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eComposition\u003c\/th\u003e\n\u003ctd\u003eCu 55%, Zn 20%, Ni 25% (plus proprietary metals; may also contain silicon and deoxidizers)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eContains Gold\u003c\/th\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSold By\u003c\/th\u003e\n\u003ctd\u003eTroy ounce (20 pennyweights \/ 31.1 grams)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCompatible Karat Range\u003c\/th\u003e\n\u003ctd\u003e9K – 18K white gold\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePre-Alloying Temp (10K)\u003c\/th\u003e\n\u003ctd\u003e1100°C – 1120°C \/ 2012°F – 2048°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePre-Alloying Temp (14K–18K)\u003c\/th\u003e\n\u003ctd\u003e1050°C – 1070°C \/ 1922°F – 1958°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCasting Temp (10K)\u003c\/th\u003e\n\u003ctd\u003e1095°C – 1115°C \/ 2003°F – 2039°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCasting Temp (14K)\u003c\/th\u003e\n\u003ctd\u003e995°C – 1015°C \/ 1823°F – 1859°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eCasting Temp (18K)\u003c\/th\u003e\n\u003ctd\u003e985°C – 1005°C \/ 1805°F – 1841°F\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eFlask Temperature\u003c\/th\u003e\n\u003ctd\u003e540°C – 675°C \/ 1004°F – 1247°F (varies by flask size, karat, and jewelry type)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eQuench Time\u003c\/th\u003e\n\u003ctd\u003e20–30 minutes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eRecommended Flux\u003c\/th\u003e\n\u003ctd\u003eBoric acid\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cp\u003eMelt temperature may vary depending on the type of casting unit used. Fluxing is extremely important when working with white gold to ensure proper oxide pickup. The composition listed reflects the primary declared metals; proprietary metals and processing aids may also be present. Confirm all technical parameters are appropriate for your specific equipment and application before use.\u003c\/p\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":44245843312854,"sku":"846-900","price":8.6,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/premium-white-9-18-silicon-free-casting-master-alloy-per-troy-ounce-20dwt-otto-frei.jpg?v=1726697577"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/collections\/dark-yellow-9-14-investment-casting-master-alloy-for-stone-in-place-casting-per-troy-ounce-20-dwt-otto-frei.jpg?v=1759195219","url":"https:\/\/www.ottofrei.com\/es\/collections\/gold-silver-master-alloys-casting.oembed?page=2","provider":"Otto Frei","version":"1.0","type":"link"}