Copper Oxide Black (R7390)

Packaging: 100 gr (0,22 lb) - 1 kg (2,20 lb) - 25 kg (55,12 lb)

Copper Oxide CuO : 99% (Min)
Copper Cu: 79% ( Min)
Turquoise in Ceramics...
Throw 3% - 5% Copper Oxide into the ceramic glaze. Dip and remove your ceramic biscuit products.
Or apply with a brush.
You will get a turquoise color.
It is one of the oldest coloring oxides.
It is one of the copper-I compounds, where copper is monovalent, and copper-II, where it is divalent.
CuO, which forms the red color called ox blood in glazes with copper reaction, gives turquoise blue tones and green colors in the oxidizing firing atmosphere.
When mixed with cobalt in different proportions, it gives all the bluish green tones used in majolica glazes.
Likewise, when mixed with urane and iron, it produces yellowish greens and sparkling greens.
It gives turquoise color in boron glazes.
Blue-green tones appear if used with Titan.
In glazes with abundant lithium, blue colored glazes are obtained with copper and its compounds.
In these glazes, copper red can be made in a reducing atmosphere with a small contribution of tin (SnO2).
This oxide, which gives a green color in leaded glazes, creates colors that turn blue with alkalis.
In a reducing atmosphere (reducing) above 1000C, china red can be obtained with very small amounts of copper, zinc and iron oxides.
Copper glazes are very affected by degree differences.
They cause color formation up to red, green and black.
In addition, if decorative firing is applied, they lose their shine and gain a metallic appearance.
The reason for this is that the O2 gas in the furnace at a temperature of 800C during the reducing atmosphere, cooking or cooling, is converted into (CO2) carbon dioxide gas by using a suitable (C) carbon compound and makes it reducing in the oxidizing cooking atmosphere.
Decorating with gilding on glazed pieces containing large amounts of copper presents some difficulties.
For example, if the gilding slips under the glaze, it is not visible.
It has compounds such as copper chloride (CuCl), copper sulfate (CuSO4 5H2O), Copper sulfide (CuS), Copper Titanate (CuO, TiO2).