fluorescent brightening agent

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Lusitania sinking, illustration from The War of the Nations (New York), December 31, 1919. World War I, WWI. This image is one of three on the page. (See source file for the other two.)

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Mona Lisa, oil on wood panel by Leonardo da Vinci, c. 1503-06; in the Louvre, Paris, France. 77 x 53 cm.

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Dr. Martin Luther King Jr. addresses marchers during his "I Have a Dream" speech at the Lincoln Memorial in Washington. August 28th 1963

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Title: Senate Square, St. Petersburg, December 14, 1825: repression of the troop mutiny - watercolor by Carl Ivanovitch Kollman, 1825 depicts Decembrist uprising clashing with cavalry, with spectators watching. (new style December 26, 1825) Europe. Saint

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fluorescent brightening agent

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In dye: Fluorescent brighteners
Raw natural fibres, paper, and plastics tend to appear yellowish because of weak light absorption near 400 nm by certain peptides and natural pigments in wool and silk, by natural flavonoid dyes in cellulose, and by minor decomposition products in plastics. Although bleaching…
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