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William Henry Perkin. Sir William Henry Perkin FRS (12 March 1838 – 14 July 1907) [1] was a British chemist and entrepreneur best known for his serendipitous discovery of the first commercial synthetic organic dye, mauveine, made from aniline. Though he failed in trying to synthesise quinine for the treatment of malaria, he became successful ...
Purple is a color similar in appearance to violet light. In the RYB color model historically used in the arts, purple is a secondary color created by combining red and blue pigments. In the CMYK color model used in modern printing, purple is made by combining magenta pigment with either cyan pigment, black pigment, or both.
Mauveine, also known as aniline purple and Perkin's mauve, was one of the first synthetic dyes. [1][2] It was discovered serendipitously by William Henry Perkin in 1856 while he was attempting to synthesise the phytochemical quinine for the treatment of malaria. [3] It is also among the first chemical dyes to have been mass-produced. [4][5]
A medieval depiction of the coronation of the Emperor Charlemagne in 800 AD wearing royal blue. The bishops and cardinals wear Tyrian purple, and the Pope wears white. A fragment of the shroud in which the Emperor Charlemagne was buried in 814 AD. It was made of gold and Tyrian purple from Constantinople.
In the 18th century, purple was a color worn by royalty, aristocrats and other wealthy people. Good-quality purple fabric was too expensive for ordinary people. The first cobalt violet, the intensely red-violet cobalt arsenate, was highly toxic. Although it persisted in some paint lines into the 20th century, it was displaced by less toxic ...
Subtractive. [edit] A 1908 color wheel with red, green, and violet "plus colors" and magenta, yellow, and cyan blue "minus colors". The typical artists' paint or pigment color wheel includes the blue, red, and yellow primary colors. The corresponding secondary colors are green, orange, and violet or purple.
Color theory, or more specifically traditional color theory, is the historical body of knowledge describing the behavior of colors, namely in color mixing, color contrast effects, color harmony, color schemes and color symbolism. [1] Modern color theory is generally referred to as Color science. While there is no clear distinction in scope ...
Website. www.post-it.com. A Post-it note (or sticky note) is a small piece of paper with a re-adherable strip of glue on its back, made for temporarily attaching notes to documents and other surfaces. A low- tack pressure-sensitive adhesive allows the notes to be easily attached, removed and even re-posted elsewhere without leaving residue.