642

DYEING AND CALICO PRINTING.

The darker green is a mixture of chrome green (Guignet’s) and aldehydgreen; the pale green is chrome green alone. The black is composed oflogwood liquor, iron liquor, and red liquor. The orange is dichromate oflead. The greens and orange are fixed with albumen thickened with gumtragacanth. After printing the pieces are steamed for an hour.

The blues, dark and light, are ultramarine; the orange, dichromate of lead,all fastened with albumen and thickened with gum tragacanth. The black ischrome black, a mixture of logwood liquor, bark liquor, with chlorate ofpotash as an oxidising agent, and chrome liquor (acetate of chrome) as amordant, and thickened with starch and gum. After printing the pieces aresteamed for an hour.

The dark and light purples are mixtures of ultramarine and vermillion ; andthe yellow is chrome, all mixed and fixed with albumen, and steamed afterprinting.

Z'M-m

Ultramarine and Vermillion and Chrome.

The next two specimens show a combination of pigment colours withmadder-work. The blue in the first of these is ultramarine, the yellow achrome-yellow, and the green a chrome-green, fastened with albumen, andsubsequently steamed from thirty minutes to an hour. The black is a steamchrome-black, consisting of logwood and bark liquors oxidised with chlorateof potash, with acetate of chromium for a mordant, and thickened withgum and starch. The red is extradt of madder, applied in the usual mannerby printing on a mordant “ colour ” of acetate of alumina.

In the next pattern the slate colour is a pigment, carbonaceous grey, fixedas above directed. The black, green, and yellow are produced in mannerssimilar to those in the preceding specimen, and the two shades of red arealso produced with extradl of madder. The mordants, thickenings, andmanner of application are the same as those just described.