Chrome yellow is chromate (II) chromate (PbCrO 4 ). It occurs naturally as a crocoite mineral but the mineral itself is never used as a pigment in painting. After the French chemist Louis Vauquelin discovered a new chromium element in 1797 chrome lead was synthesized in the laboratory and its use as pigment began in the second decade of the nineteenth century.
Chromium yolk is generally produced by mixing a solution of lead nitrate and potassium chromate and filtering the precipitate of lead chromate.
Because pigments tend to oxidize and darken on exposure to air over time, and contain lead, toxic heavy metals, originally replaced by other pigments, yellow cadmium (mixed with enough orange cadmium yields the color equivalent to yellow chrome).
The first recorded usage of yellow ivy as the color name in English was in 1818.
The Piper J-3 Cub aircraft has a chrome yellow color as the standard overall color, usually called "Cub Yellow" or "Lock Haven Yellow" in the flight circle, from the Piper factory in Lock Haven, Pennsylvania, where it was made in the 1930s and during World War II.
Video Chrome yellow
See also
- List of colors
- List of inorganic pigments
- School bus yellow
Maps Chrome yellow
References
Further reading
- KÃÆ'¼hn, H. and Curran, M., Chrome's Yellow Color and Other Chromat Pigments, in Artist Pigments. The History Handbook and Their Characteristics , Vol. 1, L. Feller, Ed., Cambridge University Press, London 1986
External links
- Chrome Chrome, Colourlex
- Pichon, A. Pigment degradation: The dark side of yellow Chrome. Natural Chemistry, 5 (11), 2013, 897-897. doi: 10.1038/nchem.1789
Source of the article : Wikipedia
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