{"product_id":"copper-sulfate-powder-etching-mild-steel-1-5lb-jar","title":"Copper Sulfate Powder 1-1\/2lb jar","description":"\u003cp\u003eCopper sulfate powder is used for etching mild steel, offering a safer alternative to traditional etching acids. Sold in a convenient 1-1\/2 lb jar, this powder is mixed with sodium chloride (common table salt) and warm water to create an effective etching solution. As etching progresses, the characteristic blue solution gradually fades, turning colorless when the process is complete — providing a clear visual indicator of when the steel has been fully etched.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eUsed for etching mild steel plates\u003c\/li\u003e\n\u003cli\u003eMixed in a 1:1 ratio with sodium chloride (table salt) to prevent copper from depositing on the steel and halting the etching process\u003c\/li\u003e\n\u003cli\u003eSolution changes color during use — starts blue and turns colorless when etching is finished\u003c\/li\u003e\n\u003cli\u003eEtching solution can be reused multiple times; note that each subsequent use will require more time to achieve the same etch depth\u003c\/li\u003e\n\u003cli\u003eSold in a 1-1\/2 lb jar\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow to Mix the Etching Solution\u003c\/h3\u003e\n\u003cp\u003eCombine the following ingredients to prepare a standard copper sulfate etching solution:\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003e100 grams\u003c\/strong\u003e copper sulfate powder\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e100 grams\u003c\/strong\u003e sodium chloride (cooking salt)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e1 liter\u003c\/strong\u003e warm water\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003eStir until fully dissolved before use. The sodium chloride prevents copper from plating out onto the steel surface, which would otherwise stop the etching process prematurely.\u003c\/p\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eNet Weight\u003c\/th\u003e\n\u003ctd\u003e1-1\/2 lb\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eContainer\u003c\/th\u003e\n\u003ctd\u003eJar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003ePrimary Use\u003c\/th\u003e\n\u003ctd\u003eEtching mild steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eHazardous Item\u003c\/th\u003e\n\u003ctd\u003eYes — review applicable shipping and handling requirements\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eThis product is classified as a hazardous item. Follow all applicable safety, storage, and shipping regulations when handling copper sulfate.\u003c\/li\u003e\n\u003cli\u003eEach reuse of the etching solution will require progressively longer etching times to achieve equivalent depth.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Otto Frei","offers":[{"title":"Default Title","offer_id":43583904776406,"sku":"145.120","price":6.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0609\/9832\/0342\/files\/copper-sulfate-powder-1-12lb-jar-otto-frei.jpg?v=1719956467","url":"https:\/\/www.ottofrei.com\/products\/copper-sulfate-powder-etching-mild-steel-1-5lb-jar","provider":"Otto Frei","version":"1.0","type":"link"}