Sennelier Watercolour S1 Sennelier Yellow Deep (579)

Sennelier Yellow Deep (579) Diarylide Yellow is a semi-opaque, moderately staining, intense, deep reddish yellow pigment with good tinting strength. Nickel dioxine yellow is a semi-transparent, lightly staining yellow pigment with high tinting strength, although less than that of the diarylides. It is considered a good colour match for Indian Yellow, a historic pigment no longer available. Drying time is average.

Pigment Name: PY83—Diarylide Yellow

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 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 essential in printing inks.

Alternate Names: Benzidine Yellow, Diazo Yellow.

PY153—Nickel Dioxine Yellow

Nickel Dioxine Yellow is a semi-transparent, lightly staining yellow pigment with high tinting strength, although less than that of the diarylides. It is considered a good colour match for Indian Yellow, a historic pigment no longer available. Drying time is average.

Permanence: Nickel Dioxine Yellow has excellent lightfastness.

Toxicity: Nickel metal is toxic and may irritate the skin.

History: Unknown.

Alternate Names: Dioxine Yellow Nickel.