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    Cobalt Zinc Aluminate Blue

    PB72

    Alternate Names

    Cobalt Blue Deep

    Cobalt Blue Dark

    Pigment Description

    Decent to excellent lightfastness with some fading in tints. A variety of Cobalt Blue Deep. Like all cobalts it has toxicity, and it is rated at "B" so handle with extra care and proper precautions.

    Resources

    PB72 pigment data from David G. Myers, The Color of Art Pigment Database, Artiscreation.com

    Information about PB72 from Bruce MacEvoy, Handprint Guide to Watercolors,

    Stats

    Lightfastness

    Excellent

    Excellent but may fade in tints (8’s and 7’s on BWS). See also Golden’s (lightfastness testing)[https://justpaint.org/astm-lightfastness-testing-for-oil-paints/] for Cobalt Blue Deep PB74. There may be a bit more variability in lightfastness than was once thought.

    Transparency

    Semi-Transparent

    Toxicity

    Hazard, Use more caution

    Hazardous, contains cobalt. Monona Rossol has information on cobalt pigments available through her site as well as the Artist's Guide to Health and Safety. CAMEO also comments on some of the toxic effects of cobalt. We are not toxicologists nor safety experts so please consult the relevant authorities and also SDS. Treat all pigments and paints with studio safety protocols.

    Particle Size

    Fine

    Chemical Name

    Cobalt Zinc Aluminate Blue Spinel

    with PB72 (Cobalt Zinc Aluminate Blue)
    No single-pigment Oil found with PB72

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