Sennelier keeps a watchful eye on the pigments selected for its lines of extra-fine oils, oil sticks, watercolors, soft pastels, and oil pastels. These same pure pigments are now available to artists wishing to master the preparation of their own colors.
Color Swatch created using loose powder and was applied on 4" diameter × ½" deep dish of plastic material.
Chrome Yellow is a relatively inexpensive pigment with excellent covering power. It has only fair to poor chemical stability, although modern varieties of this pigment are photochemically stabilized. This pigment is quick drying in oil. Darker shades of Chrome Yellow have been known to brown over time and blacken when in contact with sulfur bearing air. A green color sometimes results when it is mixed with organic pigments. Cadmium Yellow has been considered a suitable replacement for Chrome Yellow for over 160 years.
Chrome Yellow is more permanent in darker shades than lighter ones, and it is more permanent in oil than watercolor. Its lightfastness ranges from fair to poor. Overall, it is not suitable for permanent painting.
Chrome Yellow is a known human carcinogen. It is extremely toxic if inhaled and highly toxic when ingested or put in contact with skin. Evidence of Chromium(III) carcinogenicity is inconclusive. Chromium(III) salts appear in greenish pigments. Chromium(VI) salts, which appear in yellowish pigments, have been proven to cause cancer. WARNING: This product contains a chemical known to the State of California to cause cancer.
In 1797, the Parisian chemist Louis Nicholas Vauquelin isolated natural lead chromite (chrocoite). Its name came from the Greek word khroma, meaning color, because of the range of hues that could be derived from it. The use of chrome colors was limited until a substantial supply of chrome ore was found in North America, allowing large scale production.
Leipzig Yellow, Paris Yellow.
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