This quality jewelry making firing kit is perfect for firing bronze clay, copper clay, PMC Pro, and Accent Silver. Fine silver clays can also be sintered using this kit. Firing fine silver in carbon is a good way to incorporate low-fire cubic zirconia, lab and natural gems (including diamonds) that would change colour or be damaged if fired on an open kiln shelf.This kit includes 100g of activated carbon and steel sintering tray with lid (width 80mm x depth 80mm x height 45mm).Simply place 10mm of activated carbon the tray, place your dried PMC creations on top of the carbon and pour more carbon on top of your artwork covering it completely without the carbon piling higher than the rim of the tray. Simply place the lid on top and you're done and your sintering set is ready for the kiln, please follow the instructions that came with your PMC to determine the best temperature for firing.In time ash deposits will build up on the activated carbon every two to three firings, to clean simply pour the activated carbon from one container to another, from a height of a few centimetres, two or three times and let the air carry away the dust. Best when done outside.