Rose-red dye

Usage examples of eosine.

O, Acid Magenta, Indigo Extract, Phloxine, Naphthol Yellow, Orange G G, Scarlet S, Azo Red A, Eosines, Thiocarmine R, Naphthol Black B B, New Victoria Black Blue, Erythrosine, and Roccelline.

Such inks are made from a fine, cheap powder, of which nigrosine is used in making black inks, eosine for red, and methylene for blue ink, and they cost only a few dimes a gallon to manufacture.

The intensity of some of the aniline colors may be indicated by the fact that a single grain of eosine in ten millions of water exhibits a definite rose-pink color.

With a view to testing the truth of this testimony the contestants submitted the draft to scientific experts, who pronounced the red ink to be a product of eosine, a substance invented by a German chemist named Caro in the year 1874, and after that time imported to this country.

The shades obtained from these Eosine reds are remarkable for their brilliance, but unfortunately their fastness to light, washing, etc.