Copper Oxide Red (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 (Cu₂O)

Appearance Colour: Pinkish Red

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: Relatively stable in comparison to other colourants & opacifiers

Additional Information: Red copper oxide (Cu₂O) is a reddish powder that is a reduced form of black copper oxide that produced by heat-treating the black form. Red copper oxide has a low solubility in water and beads up at the surface of a solution, which makes it difficult to work with at times.

Caution: In its powdered form, red 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.