Scientific American 2, 7.1.1860
This dye was invented by Mr. Perkins, of Greenford Green, near London. It is prepared by taking equal proportions of sulphate of aniline and bi-chromate of potash, dissolving them in water, mixing and allowing them to stand for several hours. The whole is then thrown upon a filter, and the black precipitate which is formed is washed and dried. This black substance is then digested in coal-tar naphths, to extract a brown resinous substance; and finally digested with alcohol to dissolve out the coloring matter, which is left behind on distilling off the spirit, as a coppery friable mass. This is the dyeing agent producing all the varieties of purples known by the name of mauve. The particularity of these purples consists in the peculiar blend-ing of the red and blue of which they are constituted. These hues admit of almost infinite variation; consequently, we may have many varities of red mauve, and as many of blue mauve, and any depth of tint can be secured. The permanence of these combinations is their strongest recommendation.