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Learning Center - Resources, inspiration and expert advice on metal clay and jewelry making in silver, gold and bronze
Silver Alloy Clay Products

PMC PRO and PMC Sterling are silver alloy clays, and are the latest innovation in metal clay formulas. These clays offer the user the strongest final product, comparable to sterling silver. When fired, they are nearly indistinguishable from a cast object. The silver content of PMC PRO silver alloy clay is 90%, and the silver content of PMC Sterling silver alloy clay is 92.5%. Because these two products are alloys, and have up to 10% copper content, they must be fired with carbon, and must be fired in a kiln.

The Basic Form: Lump
Lump Form

The basic clay material is called "lump form". It comes in a sealed foil packet and is ready to use. Lump form is used to roll slabs, snakes and to mold or sculpt objects. Lump form can be thinned with water and used as a paste. PMC PRO and PMC Sterling come in lump form only.

PMC PRO Silver Alloy Product Line
PMC PRO Silver Alloy Clay

This product is 90% fine silver and 10% binder by weight. PMC PRO shrinks about 15% to 20% of its original size during sintering. Objects made from this version are very strong. PMC PRO can withstand dapping, bending, forming and soldering. Kiln fire only in carbon for a minimum of 1 hour, or for the strongest, most durable product, fire for a full 2 hours @ 1425F.

Uses PMC PRO offers the most versatility of any other silver clay type. The strongest of all metal clays, PMC PRO can be rolled very thin for delicate ring shanks, findings and settings.
Workability PMC PRO has very good working properties and does not dry out as quickly as some other clays. Water can be added to extend the working time when the clay begins to stiffen.
Any object that can withstand the firing temperatures and times of PMC PRO can be embedded and fired in place. Some, but not all natural gemstones, lab gems, cubic Zirconia and porcelain can be used.
Temperature Hold Time
Carbon Firing Only 1425F 1 hour
Carbon Firing Only 1425F 2 hours +

PMC Silver Alloy Clay Products