|Specially formulated fusible glass is tested for it's COE rating (coefficient of expansion) and is designed specifically for kiln firing. Delphi carries a wide selection of both 90 and 96 COE (coefficient of expansion) fusible glass in a variety of textures and colors.
Delphi Tip: See our Fusing Supplies to find project books, beginner kits, tools and embellishments to fire up your creativity.
Please Note: Never mix 90 and 96 COE glass in a project. It will cause stress and result in your piece breaking. When fusing, fire with one COE if combining glass pieces.