Sennelier Watercolour S1 Alizarin Crimson (689)

Alizarin Crimson (689) Diarylide Yellow is a semi-opaque, moderately staining, intense, deep reddish yellow pigment with good tinting strength. Perylene Maroon is a transparent, dull to moderately dull, deep red pigment. Its transparency makes it useful as a glazing colour. Its mixing complement is Phthalo Green, and together, they produce a pure black that is darker than most carbon-based pigments. Perylene Maroon is not suitable for acrylics. Quinacridone Red is a bright, clean red pigment with an average drying time. Quinacridone pigments have relatively low tinting strength in general.

Pigment Name: PY83—Diarylide Yellow 83

Diarylide Yellow is a semi-opaque, moderately staining, intense deep reddish yellow pigment with good tinting strength.

Permanence: Diarylide Yellow 83 has excellent lightfastness and permanence. However, it can fade in tints, so some artists do not consider it suitable as an artist’s colour. Many other diarylide yellow pigments are reported to have fair to poor lightfastness, and some are completely fugitive. Diarylide Yellow 83 is reputed to be one of the most permanent of the entire group.

Toxicity: Diarylide Yellow has no significant acute hazards, but chronic hazards have not been well studied.

History: 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.

Alternate Names: Benzidine Yellow, Diazo Yellow.

Pigment Name: PR179—Perylene Maroon

Perylene Maroon is a transparent, dull to moderately dull, deep red pigment. Its transparency makes it useful as a glazing colour. Its mixing complement is Phthalo Green, and together, they produce a pure black that is darker than most carbon-based pigments. Perylene Maroon is not suitable for acrylics.

Permanence: Perylene Maroon has excellent permanence and lightfastness, and it can be an appropriate replacement for Anthraquinone Red in watercolour form.

Toxicity: Perylene Maroon has no significant acute toxicity. Its long-term hazards are currently unknown.

History: Perylenes have been used as vat dyes since 1912 but were not manufactured and sold as pigments until 1957.

Alternate Names: Perylene.

Pigmennt Name: PR209—Quinacridone Red

Quinacridone Red is a bright, clean red pigment with average drying time. Quinacridone pigments have relatively low tinting strength in general. For this reason, quinacridone colours are often expensive because more pigment is required in the formulation.

Permanence: Quinacridone Red has excellent permanence and lightfastness.

Toxicity: Quinacridone Red has no known acute hazards. Overexposure to quinacridone pigments may cause skin irritation. Quinicridone pigments contain a compound found to be a skin, eye, and respiratory irritant.

History: Although quinacridone compounds became known in the late 19th century, manufacturing methods that made them practical for use as commercial pigments did not begin until the 1950s. Quinacridone pigments were first developed as coatings for the automotive industry but were quickly adopted by artists.

Alternate Names: n/a