Kuretake Gansai Tambi Watercolor Pan - Rose Madder

Pigment Information

This color contains the following pigments:

PY3-Hansa Yellow 10G

PR48:3-Permanent Red

PR81-Rhodamine 6G

BR12-Basic Red

Pigment Name

PY3-Hansa Yellow 10G

Pigment Type

organic, monoazo

Chemical Formula

C16H12CL2N4O2

Properties

This Hansa yellow is a transparent yellow. It has great brightness and tinting strength and its drying time ranges from average to slow. Hansa Yellow makes more intense tints and cleaner secondaries than Cadmium Yellows, especially when mixed with other organic or modern colors like Phthalo Blue and Green. Because they are more transparent, they have great value as glazing colors.

Permanence

This Hansa Yellow has fair to good permanence, particularly in the lighter shades.

Pigment Name

PR48:3-Permanent Red

Pigment Type

organic, monoazo

Chemical Name

beta-oxynaphthoic acid lake, strontium salt

Properties

Permanent Red is a common name used for the strontium salt of beta-oxynaphthoic acid (BONA) lake pigment PR:48. It is substantially bluer than other shades of PR:48. BONA pigment lakes tend to have high tinting strength, however the tinting strength of PR48:3 is only average.

Permanence

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 PR48:3 has been reported to be the most lightfast of the BONA lake pigments.

History

Pigment Red PR48:3 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. PR48:3 is used in printing, plastics, architectural paints, and industrial finishes.

Pigment Name

PR81-Rhodamine 6G

Pigment Type

organic, fluorone dye

Chemical Formula

C28H31N2O3Cl

Properties

Rhodamine 6G is a staining reddish-yellow pigment that has fluorescent properties. It is extremely soluble in both water and alcohol. Fluorescent molecules absorb light at one wavelength and emit light at a longer wavelength.

Permanence

Rhodamine 6G, like all fluorescent dyes, is not considered permanent, however it is reported  to have high stability for a fluorone dye.

History

Rhodamine dyes are often used for microscopy in the biological sciences. Rhodamine 6G is often used as a laser dye.

Pigment Name

BR12-Basic Red

Chemical Name

astra phloxine lake