Sennelier Watercolour S3 Red Orange (640)

Red Orange (640) Diarylide Yellow is a semi-opaque, moderately staining, intense, deep reddish yellow pigment with good tinting strength. 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. Diarylide Yellow 83 is reputed to be one of the most permanent of the entire group. Perinone Orange is an intense, clean, reddish-orange pigment classified as a vat pigment. It has an average drying time.

PY83—Diarylide Yellow 83 is a semi-opaque, moderately staining, intense, deep reddish yellow pigment with good tinting strength.

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 entirely 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.

PO43—Perinone Orange is an intense, clean, reddish-orange pigment classified as a vat pigment. It has an average drying time.

Permanence: Perinone Orange has excellent lightfastness and weather fastness.

Toxicity: Perinone Orange is not considered toxic.

History: Perinone orange is often used in plastics, vinyl, automotive finishes, and printing inks. Its high cost limits its application to products for which superior lightfastness and weather resistance are essential. Textiles are used in synthetic fabrics that must survive in harsh conditions, such as tents and awnings.

Alternate Names: Perionone Orange.