Mitsubishi PMC3 Precious Metal Clay Silver 50 grams(Japan Import) Silver PMC3 Clay 50 Grams metal weight. Please note:  Every variety of PMC is sold by the metal weight, not the weight that includes the water and binders that burn off during firing. You get every gram of precious metal you pay for from PMC. .999 Fine Silver PMC3 is suitable for torch-firing or stove top as well as kiln-firing. Can be fired to 1,200F (650C) for 20 minutes