ceruleum definition

  • noun:
    • A greenish blue pigment prepared in several ways, consisting really of cobalt stannate. Unlike various other cobalt blues, it will not transform shade by gaslight.
    • A blue pigment, consisting of stannate of protoxid of cobalt, mixed with stannic acid and sulphate of lime. Ure, Dict. Also spelled cæruleum.
    • A greenish blue pigment prepared in a variety of techniques, consisting essentially of cobalt stannate. Unlike other cobalt blues, it will not change color by gaslight.
    • A blue pigment, comprising stannate of protoxid of cobalt, blended with stannic acid and sulphate of lime. Ure, Dict. Also spelled cæruleum.

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