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1.  Overview     2. History of use     3. Making the pigment     4. Technical details

How Cobalt blue is made:          In the lab Materials needed: Aluminum chloride AlCl3, Cobalt(II)-chloride CoCl2 · 6H2O Safety (MSDSs): Cobalt(II)-chloride, Aluminum chloride (at Fisher Scientific) Method: 1 g Cobalt(II)-chloride (CoCl2 · 6H2O) and 5 g Aluminum chloride are homogenized in a mortar and heated in a test tube with a gas burner for about 3 to 4 minutes.

Illustration of the process:             making cobalt blue in the laboratory: The mixture of cobalt(II) chloride and aluminum chloride is being homogenized Heating of the mixture in a test tube After several minutes the reaction is completed The finished product   The ground pigment:             Pile of ground Cobalt blue:

Other blues         (intro) - Azurite - Cerulean Blue - cobalt blue - Egyptian blue - Indigo       Prussian blue - smalt - Ultramarine