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Today, the Winsor & Newton Professional Watercolor range benefits from continued advancements in pigment technology and production methods, building on the company's already high standards to produce even brighter, more transparent, and more stable colors.
Color Swatches created using heavy application/diluted application and were applied on cold press watercolor paper (150 lb) material.
organic, vat dyes
complex, insoluble anthraquinone
C28H14N2O4
Indanthrene Blue is a clear, clean, deep blue organic pigment. It has moderate to high tinting strength and is not as overpowering as Phthalo Blue. Hansa Yellow Deep, Benzimidazolone Orange, and Raw Umber are its best mixing complements.
Indanthrene Blue is permanent with excellent lightfastness in both masstone and tints.
Indanthrene Blue varies in its acute toxicity, though toxicity is generally slight.
Indanthrene Blue is the oldest vat dye, discovered and patented in 1901 by Rene Bohn. It is considered the first anthraquinone vat dye, a group of dyes characterized by excellent lightfastness. The pigment originates from this dye.
Indanthrone.
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