Cobalt Oxide

Cobalt, a potent coloring oxide, imparts a vibrant blue hue to glazes at all temperatures, turning black in high concentrations. As the most powerful ceramic colorant, it remains stable in most systems, commonly added at 1% or lower. Similar to copper, it exhibits active melting in oxidation. When mixed in a high percentage with a fluid frit base, it crystallizes completely during cooling. While potters have historically used cobalt as a body and slip stain, achieving consistent results without fired specks posed challenges.

Sold per the .25lb bag. The price above is price per the .25lb bag. Enter the number of .25b bags. Quantity break pricing will be applied at checkout.
1 bag= .25lbs, 2 bags= .5lbs, 4 bags = 1lb