Sennelier Watercolour S1 Light Yellow Ochre (254)

Light Yellow Ochre (254) Nickel Azo Yellow is a transparent, moderately staining yellow pigment with high tinting strength. It is considered a good colour match in botanical and landscape painting for natural gamboge (NY24), a historic yellow pigment with fair to poor lightfastness.

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.

Pigment Name: PY150—Nickel Azo Yellow

Nickel Azo Yellow is a transparent, moderately staining yellow pigment with high tinting strength. It is considered a good colour match in botanical and landscape painting for natural gamboge (NY24), a historic yellow pigment with fair to poor lightfastness.

Chemical Name: nickel azomethine yellow

Permanence: Nickel azomethine yellow has excellent lightfastness.

Toxicity: Nickel azo yellow pigment is mildly toxic and often labelled hazardous. Avoid respiratory and skin exposure to pigment dust. It should be disposed of properly with other hazardous wastes, not washed down the sink. However, the contribution of artist pigments to levels of nickel metal complexes in the environment is almost insignificant. Nickel is often present naturally in the environment. Nickel is used heavily in steelmaking and many industrial processes and products.

History: Nickel azomethine yellow has been developed as an artist's pigment because it is closely matched to gamboge, a historic yellow.

Alternate Names: Gamboge Hue, New Gamboge.

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.