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Copper, Lead, Silver
See Bullseye Reactive Potential charts for more information
Color variations common from minty-pastel to vibrant yellow-green.
Lighter coloration matures and becomes consistent to target upon firing. A sulfur glass. May react with lead and copper glasses to create dark interface (lead sulfide, copper sulfide).
This style is not suitable for kilncasting because it can become incompatible when held at high temperatures for an extended period. It may also become incompatible in instances where processes exceed the parameters of the test for compatibility. Testing recommended when heatwork exceeds these parameters.