Cone 6: Sapphire is a rich, deep cobalt blue glaze. It has a glossy, mirrored surface which can give colors from dark blue to bluish-purple, depending upon the thickness of application.
Cone 10: No Change.
TIP: If the application is too thin, the glaze will be streaky.
Comes in a 16 oz wide-mouth jar or 5 lbs dry mix. Dinnerware safe.