Blick StudioArtists' ColoredPencils and Sets
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These artist grade watercolors continue the Blockx family legacy that began in 1865. They are made using the same processes developed many years ago. Pigments are mixed with only the finest quality ingredients, including the purest gum arabic and honey.
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
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.
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® Blockx is a registered trademark.