A new Jessica Putnam-Phillips glaze. Black copper is a glossy microcrystalline red copper glaze that breaks black. Made for dipping and pouring for cone 5/6.
- 11-inch hydrometer reading = 1.45
- 6-inch hydrometer reading = 45
SAFETY WARNING
Tableware producers must test all finished ware to establish dinnerware status, due to possible variations in firing temperature and contamination.