May React With
This glass can be unstable when subjected to extended heatwork (pattern bars, pot melts, boiled effect, kilncasting, etc.). Firing above 1500°F (815°C) for more than 15 minutes or firing slowly between 1250°F (677°C) and 1500°F (815°C) may result in an unstable glass.
No colour shift upon firing. A dark interface reaction is possible with sulfur-bearing glasses (001137, 000137). Dense White Powder (000313-0008F) is recommended for surface use only. It may crackle when used between sheet glass layers.