To use all functions of this page, please activate cookies in your browser.
With an accout for my.chemeurope.com you can always see everything at a glance – and you can configure your own website and individual newsletter.
- My watch list
- My saved searches
- My saved topics
- My newsletter
A Lake pigment is a pigment manufactured by precipitating a dye with an inert binder, usually a metallic salt. Manufacturers and suppliers to artists and industry frequently omit the lake designation in the name. Many lake pigments are fugitive, because the dyes involved are unstable when exposed to light.
Additional recommended knowledge
The metallic salt or binder used must be very inert and insoluble in the vehicle, and it must be white or very neutral. It must have low tinting strength, so that the dye itself determines which wavelengths are absorbed and reflected by the resulting precipitate. In ancient times, chalk, white clay, and crushed bones were used, sources of calcium carbonate and calcium phosphate. The salts that are commonly used today include barium sulfate, calcium sulfate, aluminum hydroxide, and aluminum oxide (alumina), all of which can be produced cheaply from inexpensive mineral ores.
Lake pigments have a long history in decoration and the arts. Some have been produced for thousands of years, and traded over long distances.
Indigo and Rose Madder are now produced more cheaply from synthetic sources, although some use of natural products persists, especially among artisans. The food and cosmetics industries have shown renewed interest in cochineal as a source of natural red dye.
|This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Lake_pigment". A list of authors is available in Wikipedia.|