Copper Oxide Black (Pottery Colourant)

Colourants can be added to glazes to get the desired coloured effects. Unlike stains, colourants react differently in each firing. A wide spectrum of colours can be achieved by mixing them with other colourants, opacifiers & stains.

Name: Copper Oxide (CuO)

Appearance Colour: Grey~Black

Form: Powder, Inorganic Compound

Recommended Usage:

• In Slips: 2%-8%
• In Glazes: <5%

If concentrations above 5% are used, glazes often change to a metallic pewter/black.

Output Colour: Shades of green in oxidation and red in reduction firings.

Stability: Not Known

Additional Information: Black copper oxide (CuO) is a blackish-grey powder used as a colorant in the preparation of slips and glazes. It acts as a flux and produces fluid glazes. Black copper oxide can also be prepared as a wash and used for brushwork application to bisqueware. It contains more copper than copper carbonate, copper oxide is more intense colour results.

Caution: In its powdered form, black copper oxide is harmful if swallowed and a potential skin and respiratory tract irritant. Please use protective coverings when handling this substance.

Note: Owing to the nature of ceramic making process and the varied combinations of elements, we request the user to always test their formulations before bulk production/purchase. It is for the user to satisfy that the product meets their requirements.