Delft Clay Casting Kit

Press a pattern into fine sand clay, cut a sprue and pour molten metal into the impression at the bench: this kit pairs the 60 mm two-part aluminum mold frame with a 4.4 lb (2 kg) bag of clay to do exactly that. Delft Clay is a highly refined sand-casting medium invented by Dutch goldsmith Hans Karreman. Finer than ordinary casting sand, it produces sharp, highly detailed castings in gold, silver, copper-based alloys, pewter and more, with minimal cleanup. Because the process is cold-molding, you can use patterns made from wood, wax, epoxy, plastics or metal, and the clay can be reused after casting.

Features

• Exceptional detail: fine grain captures crisp lines and textures.
• Less finishing: clean casts reduce filing and polishing time.
• Reusable medium: clay can be reclaimed and used again after casting.
• Flexible patterns: compatible with wood, wax, epoxy, plastics and metal masters.

Compatibility

• Metals: gold, silver, copper-based alloys, pewter and more
• Pattern materials: wood, wax, epoxy, plastics or metal masters
• Best on designs without pronounced undercuts, as with any sand-casting process

Notes

What you get:

• 122.942, Delft 60 mm Two-Part Aluminum Mold Frame (ring frame)
• 122.946, Delft Clay, 4.4 lb (2 kg) bag

Basic process

1. Fill and compact clay into one half of the aluminum ring frame, then strike off the excess.
2. Press your pattern halfway into the clay and dust the surface with talcum powder.
3. Install the second half of the ring, fill with clay and compact.
4. Open the frame and remove the pattern, then cut a sprue (pouring channel) and vents.
5. Close the mold and pour molten metal.

Typical applications

• Jewelry components in gold, silver and copper alloys
• Buttons, badges, small hardware and decorative elements
• Pewter items and low-melt prototypes

• Dry, oil-free patterns release best. Use talc for clean separation.
• Always follow proper foundry safety: eye and hand protection, ventilation, and appropriate casting temperatures.