Sennelier Watercolour S1 Gold Ochre (257)

Gold Ochre (257) Diarylide Yellow is a semi-opaque, moderately staining, intense, deep reddish yellow pigment with good tinting strength. Yellow Ochre provides artists with earth tones from cream to brown. PY42 is made from synthetic iron oxides. Zinc Ferrite Brown is a yellowish brown.

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 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.

Pigment Name: PY42—Yellow Ochre

Yellow Ochre provides artists with earth tones from cream to brown. It has good hiding power, produces quick-drying paint, and can safely mix with other pigments. Its transparency varies widely from opaque shades to more transparent ones, which are valued for their use as glazes. If gypsum is present, Yellow Ochre is not suitable for frescoing. (See Brown Ochre, PY43.) PY42 is made from synthetic iron oxides. PY43 is made from natural iron oxide.

Chemical Name: iron(III)-oxide, hydrated

Permanence: Yellow Ochre has excellent permanence because ochres are some of the most permanent pigments available.

Toxicity: Yellow Ochre is non-toxic unless it contains manganese.

History: Ochre comes from the Greek word ochros, meaning pale yellow. It was one of the first pigments humans used, and evidence of its use has been found at 300,000-year-old sites in France and former Czechoslovakia.

Alternate Names: Chamois, Iron Yellow, Mars Orange, Mars Yellow, Minette, Ochre, Sil, Yellow Earth, Yellow Oxide. Varieties of Yellow Ochre include Brown Ochre, Flesh Ochre, Roman Ochre, Spruce Ochre, and Transparent Gold Ochre.

Pigment Name: PY119—Zinc Ferrite Brown

Zinc Ferrite Brown is a yellowish brown.

Permanence: n/a

Toxicity: n/a

History: Zinc Ferrite Brown has been used in paints and plastics.

Alternate Names: Zinc Iron Yellow, Zinc Ferrite