PMC Paper is a great product to use while creating custom pieces of jewelry. This product is 85% fine silver and 15% binder by weight. PMC Paper shrinks 12-15% during firing and contains metal particles that are smaller that that of PMC standard. PMC Paper is great and gives you higher metal content higher metal content and therefore less shrinkage. The firing times have been shortened dramatically from 2 hours to a minimum of 20 minutes.