Delft Clay Casting Kit

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. The clay can be reused after casting, and, as with all sand casting, it excels on parts without pronounced undercuts.

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.

Typical Applications

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

Basic Process

1. Fill and compact clay into one half of the aluminum ring frame; strike off excess.
2. Press your pattern halfway into the clay; 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; cut a sprue (pouring channel) and vents.
5. Close the mold and pour molten metal.

What's Included

Notes

• Best for designs without deep undercuts, as with any sand-casting process.
• 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.

California Prop 65 Warning:
Cancer and Reproductive Harm. www.P65warnings.ca.gov.