Mudtools Platter Rib Size:Large Black copper oxide is a

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

It is a must-have hand-building tool for all potters

More plastic than porcelains but semi-vitreous to promote stability in the kiln

Ribbon tools offer cutting loops made of flattened metal ribbons with sharpened edges

Synonyms: Borax Decahydrate

Mudtools Platter Rib Size:Large Black copper oxide is aLong and lean, these Platter Ribs were designed to give good compression when you are making plates and platters enabling you to properly compress the clay and avoid those cracks that sometimes develop. They are made with a stiff polymer but still offer some flexibility. The Small one is particularly good for making shallow pasta style bowls. Mudtools Platter Ribs are available in 2 sizes. The Large Platter Rib measures 11. 5" and the Small Platter