Product Description:Art Clay Silver Clay - 50gm - NEW FORMULA. We think this might just be the ideal clay! •It has a better workability and a longer working time (longer than Slow Dry!) than the current Art Clay Silver products. •It retains and accepts moisture easier than the exisiting silver clay types, which means it is easier to keep supple and much easier to reconstitute if it dries. •It has similar drying times (when applying heat). •It carves and files easier in the dry stage than the existing formulas. •Fire with kiln, torch, or gas stove. Using a kiln the recommended time and temperatures are 30 minutes at 650°C on a continuum to only 5 minutes at 800°C. •Shrinkage 8-9%. The clay can be hallmarked as fine silver at any UK Assay Office. The 50gm package contains 2 individually wrapped 25gm blocks of clay.