Our Silver Clay Firing Support kit consists of a high-temperature fused silica firing dish filled with your choice of firing media. The media cradles items needing support during firing. Beads, domes and other 3-dimensional or hollow items need support during firing to avoid flat spots, slumping or collapse.
Choose Vermiculite or Alumina Hydrate as a Media
Vermiculite and alumina hydrate are both safe and work well as a firing media. Vermiculite is a mineral that breaks down as it is heated into worm-like accordion shaped pieces that make a most wonderful media for firing metal clay objects.
Alumina hydrate is also a very nice media for firing. It is made from aluminum sulfate and sodium carbonate. Alumina hydrate is used in the ink and paint industry as a colorant and in the cosmetic industry as a colorant and filler. Alumina hydrate has a sandy or powdered texture which some prefer over the coarser texture of vermiculite.
Before firing metal clay in your firing dish, pre-fire the media and the dish alone to 1650F (no hold).