Cobalt Oxide in Black Powder Form is used in the manufacturing of pot, tank glass and can be employed with salt cake or nitrate batches. Cobalt Oxide is used for whitening of ceramic bodies and ceramic frits that is used for bleaching the yellow colour in whiteware. Cobalt Oxide is offered in Microfine black powder form that is insoluble in water but soluble in HCL. Cobalt Oxide in Black Powder Form can also be used in manufacturing of cobalt ceramic colours.