Ball Clay, XX Sagger Size:22.68 kg Black copper oxide is a

Black copper oxide is a black powder used as a colorant in the preparation of slips and glazes

which means that it causes glazes to melt at relatively high temperatures

They are made and manufactured for several reasons: to provide a consistent and stable form of colorant that doesn’t dissolve in the glaze melt as easily as coloring metal oxides

this body has good strength

Ideally suited as a refractory agent to reduce body maturity

Ball Clay, XX Sagger Size:22.68 kg Black copper oxide is aA fine grained secondary clay which fires to a light cream with 13% shrinkage at cone 10. This ball clay is considered to be very effective in salt firing and it is claimed that it works well in flashing (i. e. wood firing). Safety Data Sheet: SDS