Glass that is used in kiln-forming should be "tested compatible" with other glass from the same manufacturer(s) to ensure that the finished glass piece doesn't contain "stress" and break.
Some of the different glass components used in warm glass are sheet glass, noodles, stringers, rods, frit, and dichroic glass.
Types of colored sheet glass include opalescents (solid), transparents, and mixes such as streakies.
Coatings available for glass include dichroic (very intense colored metallic finish, expensive) and iridescent (less intense colored metallic finish, inexpensive).
Rods, noodles and stringers are long slim pieces of glass that resemble fettucini or spaghetti and are used as accents as well as arranged into stripes for intricate design. Frits are used as accents as well as used for glass casting and "painting".
