Winsor & Newton Professional Watercolors offer artists the widest and most balanced choice of pigments with the greatest possible permanence. These paints have brilliance, transparency, and purity of color unparalleled by any other watercolor.
Color Swatch created using heavy application/diluted application and was applied on cold press watercolor paper (150 lb) material.
Benzimidazolone Orange is a staining, yellowish orange pigment that can become dull in tints. It has an average drying time, and it loses some of its intensity as it dries. The yellowish orange varieties are more transparent.
Benzimidazolone Orange has excellent lightfastness and outstanding heat and solvent stability for a monoazo pigment.
Benzimidazolone Orange is not considered toxic.
The benzimidazolone group of pigments was developed and patented in 1960 by Hoechst A.G., a German chemical manufacturer that was a forerunner of the pharmaceutical company Aventis. Use of benzimidazolone pigments in the auto industry, especially Benzimidazolone Orange, became common in the 1980s because they were common replacements for lead chromate pigments, which were phased out during this period.
Permanent Orange, Benzimida Orange
Isoindolinone Yellow is a new-generation organic pigment that has a very high tinting strength and average drying time.
Isoindolinone Yellow has excellent lightfastness.
Isoindolinone Yellow is not considered toxic.
The first isoindolinone pigments were patented in 1946, and commercial production of pigments in this group began in the 1960s. Several isoindolinone yellow pigments are available.
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