417-25 Cobalt Turquoise

• PB28 ^{●●●●●}

Cobalt Turquoise pigment is cobalt aluminate blue spinel (CoAl2O4) produced by calcining, at high temperature, a mixture of cobalt (II) oxide, and aluminum (III) oxide in varied ratios forming an interdiffused crystalline spinel. It may include any one or more modifiers MgO, ZnO, Li2O, and/or TiO2. Cobalt blue pigments are the most durable blue pigments commercially available. They have excellent chemical and heat stability and can be used in chemically aggressive environments and exterior durable applications without color fade.