LUG-1 Black

Black Liquid Underglaze is a deep obsidian black that is dark and smooth at cone 05, fluxes into a soft glaze-like surface at cone 6, and maintains a deep black tone with a soft sheen all the way to cone 10. Though the underglaze does become glaze-like, a clear gloss glaze can give Black an impeccably smooth finish with relatively good color, thought it can cause small moments of transparency in the surface.

Tableware producers must test all finished ware to establish dinnerware status, due to possible variations in firing temperature and contamination.