PMC stands for Precious Metal Clay and was developed in Japan in the early 1990’s, by metallurgist Masaki Morikawa.
PMC is made by the Mitsubishi Materials Corporation in Japan and comes in 4 basic forms. It is made from finely ground silver particles, mixed with a non-toxic organic binder and water.
Lump Clay which is sold in sealed packets to keep it moist, a soft paste in a syringe absolutely brilliant for fine detail, small jars of slip, the glue element, and paper like sheets which have had the water content removed and is great for using with paper punches and creating origami designs.
When PMC is fired in a kiln or by torch the organic binder and water burns off leaving the solid fine silver. PMC also shrinks by approximately 10-12%.
PMC Fine Silver is 99.9% pure which a bit like 24 carat gold is softer but doesn’t oxidise or tarnish as rapidly as Sterling Silver.
Sterling Silver is 92.5% pure mixed with other metals such as copper to make it a bit more durable, which is why I like to use it for findings and clasps.
Keep an eye on my blog because I am always experimenting with different materials and methods.