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Brilliant and beautiful, Holbein Artists' Watercolor Half Pans have been created for artists who enjoy painting anywhere and everywhere. Made with traditional and modern pigments, these watercolors offer exceptional brilliance, excellent lightfastness, and crisp, clean results without muddiness.
Color Swatches created using heavy application/diluted application and were applied on cold press watercolor paper (150 lb) material.
beta-oxynaphthoic acid lake
Beta-oxynaphthoic acid (BONA) lake pigments vary in their hue and other properties, depending on what metals they form a salt with. Both pure and mixed metal salts are used. They tend to have high tinting strength and good stability and lightfastness.
Beta-oxynaphthoic acid lake pigments tend to have high tinting strength and good stability and lightfastness, but results vary with the application, and the presense of titanium dioxide may reduce lightfastness.
Beta-oxynaphthoic acid may have been synthesized as early as 1887. Commerical use of BONA lake pigments began in the 20th century.
Brilliant Red, Ruby Red
This Naphthol Red is an intense scarlet red pigment that is heavily staining. It has an average drying time. It is semi-transparent and has relatively poor covering power.
This Naphthol Red has been rated as having excellent lightfastness under ASTM testing, but other testing methods have demonstrated some tendancy for the color to fade with exposure to strong ultraviolet light. It has been considered a replacement for less lightfast naphthol reds such as PR3. Not suitable for exterior use.
Naphthol Reds are not considered toxic. Naphthol Red AS-D may cause eye, skin, or respiratory irritation. Contact with dry pigment should be avoided.
Naphthal, Naphthol Bordeaux, Naphthol Carbamide, Naphthol Carmine, Permanent Carmine, Permanent Red, Fanchon Red.
diarylide yellow H10G
Diarylide Yellow is a semi-opaque, moderately staining, intense deep reddish yellow pigment with good tinting strength and excellent heat resistance.
Diarylide Yellow 81 is considered to have very good lightfastness, 7 on the blue wool scale (1-8).
Diarylide Yellow has no significant acute hazards, but its chronic hazards have not been well studied.
Diarylide Yellow comes from a family of azo pigments called diarylide. These yellow hued pigments were developed around 1940 and are very important in printing inks.
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