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    • Sennelier Watercolour No. 344 Cinereous Blue series 1

      Sennelier Watercolour No. 344 Cinereous Blue series 1

      C$14.77

      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:
        PB15:3-Phthalo Blue
        PW4-Zinc White
        Pigment Name
        PB15:3-Phthalo Blue
        Pigment Type
        organic
        Chemical Name
        beta copper phthalocyanine
        Chemical Formula
        C32H16CuN8
        Properties
        Phthalo Blue PB15:3 is a structural variant of Phthalo Blue PB15 that produces more greenish tones.
        Permanence
        Phthalo Blues are completely lightfast and stable and are permanent for all paint uses. They are currently used in inks, coatings, and many plastics due to their stability and are considered a standard pigment in printing ink and the packaging industry.
        Toxicity
        Phthalo Blues have no significant hazards, although those made before 1982 contained some PCBs (polychlorinated biphenyls).
        History
        Developed by chemists using the trade name Monastral Blue, the organic blue dyestuff now known as Phthalo Blue was presented as a pigment in November 1935 in London. Its discovery was accidental. The dark color was observed in a kettle where a dye was being made from a British dyestuff plant. The demand for such a pigment came from commercial printers who wanted a cyan to replace Prussian Blue.
        Pigment Name
        PW4-Zinc White
        Pigment Type
        inorganic
        Chemical Name
        zinc(II)-oxide
        Chemical Formula
        ZnO
        Properties
        Zinc White is the coolest white, and it has a cold, clean masstone and a slightly bluish tint. It has less hiding power and is more transparent than other whites. It dries slowly and is good for painting wet into wet and for glazing and scumbling. Zinc White is neither as opaque nor as heavy as Lead White, its covering power is not as good, and it takes much longer to dry. However, it does not blacken when exposed to sulfur in the air as Lead White does. It is very valuable for making tints with other colors. Unmixed Zinc White dries to a brittle and dry paint film that may crack over the years, so it is not good for frescoing. It is more transparent in acrylic form than Titanium White and is the most commonly used white with gouache. Chinese White is a version of Zinc White appropriate for opaque watercolor techniques.
        Permanence
        Zinc White has great permanence and lightfastness.
        Toxicity
        Zinc White is moderately toxic if ingested and slightly toxic if inhaled.
        History
        Though historians are divided on who first isolated the element zinc, they agree that it was first suggested as a white pigment in 1782. Zinc White was accepted as a watercolor in 1834 and was called Chinese White due to the popularity of oriental porcelain in Europe at the time. Ten years later, a suitable oil form was produced. By the early 20th century, it had improved to the point where it was an acceptable alternative to Flake White.

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