Daniel Smith Extra Fine Watercolor - Black (Blue/Orange), 15 ml Tube

Pigment Information

This color contains the following pigments:

PB15:6-Phthalo Blue

PR188 -Naphthol Red

PO71-Pyrrole Orange

Pigment Name

PB15:6-Phthalo Blue

Pigment Type

organic

Chemical Name

epsilon copper phthalocyanine

Chemical Formula

C32H16CuN8

Properties

Phthalo Blue PB15:6 is a structural variant of Phthalo Blue PB15 that produces more yellowish tones.

Permanence

Phthalo Blues are completely lightfast and stable and are permanent for all paint uses. They are currently used in inks, coatings, and many plastics due to their stability and are considered a standard pigment in printing ink and the packaging industry.

Toxicity

Phthalo Blues have no significant hazards, although those made before 1982 contained some PCBs (polychlorinated biphenyls).

History

Developed by chemists using the trade name Monastral Blue, the organic blue dyestuff now known as Phthalo Blue was presented as a pigment in November 1935 in London. Its discovery was accidental. The dark color was observed in a kettle where a dye was being made from a British dyestuff plant. The demand for such a pigment came from commercial printers who wanted a cyan to replace Prussian Blue.

Pigment Name

PR188 -Naphthol Red

Pigment Type

organic monoazo

Chemical Formula

C33H24Cl2N2O6

Properties

This Naphthol Red is yellowish, with a high tinting strength and average drying time. It produces warmer shades and tints.

Permanence

This Naphthol Red has excellent lightfastness, though it is generally not considered adequate for exterior use.

Toxicity

Naphthol Reds are not considered toxic. They may cause eye, skin, or respiratory irritation. Contact with dry pigment should be avoided.

History

Naphthol pigments are actually dyes that are "laked" to form pigments. First developed by the German chemical company Hoechst A.G. before World War I, their use in artist paints began in the 1920s.

Pigment Name

PO71-Pyrrole Orange

Pigment Type

organic, diketopyrrolo

Chemical Name

diketo-pyrrolo pyrrole orange

Properties

Pyrrole Orange PO71 is a transparent pigment with average or moderate tinting strength. It produces cleaner mixtures than cadmium-based colors.

Permanence

Pyrrole Orange PO71 has been reported to have excellent lightfastness, and better weather fastness than comparable cadmium pigments.

Toxicity

Pyrrole Orange PO71 has not been reported to be hazardous. In art materials, diketopyrrolo-pyrrole pigments are often promoted as non-hazardous alternatives to cadmiums.

History

Pyrrole Orange is one of the most popular diketopyrrolo-pyrrole pigments (DPP), discovered and marketed since the 1980s by Ciba-Geigy. It is used mainly in printing inks and plastics. It has also been used in automotive and industrial paints. In art materials, it has become most widely used in acrylics.

DJ284600250
TU
1
Watercolors
0.065000000000000002
DS W/C 15ML JANES BLK BLUE/ORG