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The best distinction between inks and pigments is that ink is a colored liquid while pigments are colored particles suspended in a liquid. [4] Areas colored by pigments usually have multiple layers of pigments and other mediums. [2] The most important aspect of preserving pigments and inks is to identify their composition.
Quinacridone is an organic compound used as a pigment. Numerous derivatives constitute the quinacridone pigment family, which finds extensive use in industrial colorant applications such as robust outdoor paints, inkjet printer ink, tattoo inks, artists' watercolor paints, and color laser printer toner. As pigments, the quinacridones are insoluble.
Pigment Yellow 16 is an organic compound that is classified as a diarylide pigment. Pigment Yellow 16 is used as a yellow colorant, and is classified as an arylide yellow. Also called permanent yellow, its color index number is 20040. [1] The compound is obtained via acetoacetylation of o-tolidine using diketene.
Pigments may be any number of natural or synthetic substances with color, such as sulfides for yellow or cobalt salts for blue. Traditional pigments were based on minerals or plants, but many have proven unstable over long periods. Modern pigments often use synthetic chemicals. The pigment is mixed with oil, usually linseed, but other oils may ...
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The cyanotype was discovered, [2] and named thus, by Sir John Herschel who in 1842 published his investigation of light on iron compounds, [3] expecting that photochemical reactions would reveal, in form visible to the human eye, the infrared extreme of the electromagnetic spectrum detected by his father William Herschel and the ultra-violet or 'actinic' rays that had been discovered in 1801 ...
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