May React With
Copper, Lead, Silver
Variations from orange-red to dark red. “Catspaw" windows of lighter coloration typical of single-rolled sheets.
A cadmium/selenium glass. Generally fires deeper (more red) than cold sheet. “Catspaw" effect disappears on firing.
This style is not suitable for kilncasting because it can opalize and/or become incompatible when held at high temperatures for an extended period. It may also opalize and/or become incompatible in instances where processes exceed the parameters of the test for compatibility. Testing recommended when heatwork exceeds these parameters.
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