May React With
Selenium, Sulfur, Reactive (0009, 1009, 1019)
May have a dappled surface.
A copper glass. May have dark color reaction at interface with cadmium/selenium or sulfur glasses including 0125, 0120, 0126 and 0137. May have a red-hued colour reaction with Reactive glasses such as 0009, 1009, 1019. Tests fired to a full fuse indicate that Robin's Egg Blue Opalescent reacts visibly and with an intensity similar to 0216.