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    • Sennelier Watercolour No. 305 Cerulean Blue Red Shade series 4

      Sennelier Watercolour No. 305 Cerulean Blue Red Shade series 4

      C$22.65

      Sennelier French Artists' Watercolors offer a bright and lively palette in the tradition of French Impressionists. Featuring brilliant colors, including 50 single pigment colors (many unique to Sennelier), the colors evoke the beauty of Southern France.

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        PRODUCT DESCRIPTION

        Pigment Information

        This color contains the following pigments:
        PB28-Cobalt Blue
        Pigment Name
        PB28-Cobalt Blue
        Pigment Type
        inorganic
        Chemical Name
        cobalt(II) oxide + aluminum oxide
        Chemical Formula
        CoO + Al2O3
        Properties
        Cobalt blue is a semitransparent pigment with low to moderate tinting strength. When it dries, it appears lighter and less saturated. Pigment particles are large and grainy. Differences in how the pigment is ground and mixed lead to considerable differences in its performance among various manufacturers.
        Permanence
        Cobalt blue is absolutely lightfast and extraordinarily stable. The stability of cobalt salts at high temperatures make them the standard for blues used in ceramics and glassware.
        Toxicity
        Cobalt salts are toxic. Avoid respiratory and skin contact. Soluble cobalt may cause irritation and allergic reaction through contact with skin. It is considered a possible carcinogen.
        History
        Since ancient times, smalt blue has been used to color glass and ceramics. Cobalt salts, which give smalt its characteristic blue color, were identified in the 18th century. Techniques for manufacturing Cobalt Blue, a chemically pure salt of cobalt and aluminum oxide, were developed in 1802.

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