Copper carbonate is one of the most versatile colorants in ceramics, known to produce a wide range of colors (greens, blues, reds and browns) in glazes and engobes. The resulting shade depends largely on the firing conditions: in an oxidizing atmosphere, copper carbonate usually produces a bright green, while in a reducing atmosphere it can be transformed into red or brown tones. At medium and high firing temperatures, its performance becomes more stable, allowing intense and vibrant colors that are popular in stoneware and porcelain.
In addition, copper carbonate can be used in layered glaze techniques or in combination with other oxides to create textured and varied effects, from stains to color gradations. It is also common in cuerda seca and majolica decorations, where it adds distinctive color to geometric and floral designs.
Interesting Fact
Copper carbonate was used in ancient Egypt and Persia to create the vivid greens in ceramic decoration. It was also used in Chinese porcelain during the Song dynasty.
Helpful Tip
When using copper carbonate, be sure to apply an even layer, as copper can easily migrate during firing, affecting other nearby parts in the kiln.
