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Ancient oriental watercolors are characterized by their delicate hues. Now today's artist can journey back into time to create with the same timeless palette used by Japanese and Chinese artists 15 centuries ago.
Color Swatches created using heavy application/diluted application and were applied on cold press watercolor paper (150 lb) material.
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.
beta-oxynaphthoic acid lake, barium salt
Permanent Red is a common name used for the barium salt of beta-oxynaphthoic acid (BONA) lake pigment PR:48. It is more yellow than other shades of PR:48. BONA pigment lakes have high tinting strength.
Beta-oxynaphthoic acid (BONA) lake pigments are more lightfast than their beta-naphthol counterparts. Although their lightfastness makes them the pigment of choice in many applications, they may shift slightly in color or lose intensity under some conditions. Pigment PR48:1 has poor resistance to soap, alkali, and acid, and it is less lightfast than other BONA lake salts. It loses lightfastness when it is used in combination with titanium dioxide.
Permanent Red is a lake pigment of beta-oxynaphtholic acid, a dye that resembles the common beta-Naphthol pigments. Beta-oxynaphthoic acid may have been synthesized as early as 1887. Commerical use of BONA lake pigments began in the 20th century. Permanent Red is used in industrial paints and plastics.
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