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Dyes

Most red writ...

Question

Most red writing inks are a dilute solution of the red dye :

A

triphenylmethane

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B

methylene blue

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C

basic fucsin

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D

eosin

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Solution

The correct option is D eosin
Pigments are insoluble, whereas dyes are soluble. Most red writing inks are a dilute solution of the red dye eosin. Ballpoint ink is usually a paste containing 40 to 50 percent dye.

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