$5.99
CLICK THE "LEARN MORE ABOUT THIS ITEM" LINK JUST BELOW TO READ THE FULL DESCRIPTION FOR THIS ITEM.
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This is a synthetic version of the colorants found in the minerals azurite and malachite. The blue-green compound is properly called 'Basic Copper Carbonate' or 'Copper(II) Carbonate Hydroxide'. It has the formula Cu2CO3(OH)2. It's been used for centuries as a paint pigment, but is also used in ceramic glazes as a pigment. Like cobalt carbonate it can vary in color depending on where it comes from and how it's refined. We have two version which are called simply "light" and "dark".
This site: https://www.highettmetal.com.au/blog/copper/what-is-copper-carbonate-used-for says: "This substance, when pure, should have a mint green color. When alkaline components have been added, a tinge of blue will be added to the color. This is often added to paints, varnishes, pottery glazes and even fireworks to impart some of the color."
The ceramics database, DigitalFire, https://digitalfire.com/4sight/material/copper_carbonate_basic_236.html says when this is used in glazes:
"This form of copper carbonate is the article of commerce. What you are getting when you buy it is a mixture of theoretical copper carbonate and copper hydroxide.....Supplies of green copper carbonate basic often vary in color and density (darker and heavier, lighter and fluffier) reflecting variations in raw materials and manufacturing procedures. Despite variations in the physical appearance of the material, the amount of contained copper metal remains essentially constant."
The Wiki article on "Basic Copper Carbonate" is here:
https://en.wikipedia.org/wiki/Basic_copper_carbonate
"The basic copper carbonates, malachite and azurite, both decompose forming CO2 and CuO, cupric oxide. The purer, malachite pigment version is called "verditer", "green bice", or "mountain green", when occurring as azurite the pigment is called "blue verditer" or "mountain blue.....'Copper carbonate' was the first compound to be broken down into several, separate elements (copper, carbon, and oxygen). It was broken down in 1794 by the French chemist Joseph Louis Proust (1754–1826). When heated, it thermally decomposes to form CO2 and CuO, cupric oxide, a black solid. The basic copper carbonates, malachite and azurite, both decompose forming CO2 and CuO, cupric oxide."
Safety note: Handle all dry pigments with care. Work slowly to avoid generating airborne dust and wear a dust mask for extra protection. Also avoid getting the dust all over your hands. Latex gloves are good at providing skin protection without "getting in the way".
1-2 business days
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Aug 22, 2024
I haven’t used it yet but the pigments looks gorgeous !!! Awesome customer service ! Will definitely buy again :)!
taboo006
Aug 20, 2023
amcemrys
Jul 28, 2023
Wonderful color - Making rocks for bottom of house planks!
Kerrie Stansfield
Jun 29, 2023
Beautifully packaged. Looking forward to using it.
Neiner Neiner
Jun 9, 2023
Excellent item!! Will buy again!
Dannette