The Art of Dyeing. (Recipes 183-188) (Dick's encyclopedia of practical receipts and processes)

Dick's encyclopedia of practical receipts and processes:
containing over 6400 receipts embracing thorough information, in plain language, applicable to almost every possible industrial and domestic requirement
William B. Dick
Dick & Fitzgerald, New York 1884.

183. Chrome Dyes for Cotton Goods.

The following recipes will serve to illustrate the use and value of chrome (bichromate of potassa) as a dyeing agent. The quantities given are for dyeing 10 pounds weight of cotton, and may be increased or diminished in proportion, according to the quantity of goods to be dyed.

184. Light Straw.

To a tab of cold water add 4 ounces acetate of lead, previously dissolved; work the goods through this for 15 minutes, and wring out; into another tub of water add 2 ounces bichromate of potassa; Work the goods through this 10 minutes, wring out and pass again through the lead solution for 10 minutes; wash and dry.

185. Lemon Color.

Into a tub of cold water put 1 pound acetate of lead, previously dissolved; work the goods in this for 15 minutes, and wring out; into another tub of cold water put 6 ounces biehromate of potassa, in solution; work the goods for 15 minutes through this, and wring out; then work it 10 minutes in the lead solution; wring out, wash, and dry.

186. Deep Yellow.

To a tub of cold water add 1 pound acetate of lead, and 1 pound nitrate of lead in solution; work the goods in this for 30 minutes, and wring out; then to a tub of warm water add 12 ounces bichromate of potassa, and work the goods in it for 15 minutes; expose to the air for half an hour, then pass again through both solutions, working them the same time in each as before, and expose to the air for one hour; then pass them through the lead solution; wring out, wash and dry. If the color is not deep enough they may be passed through the solutions again, observing the same rules.

187. Deep Amber Yellow.

Put into a tub of water 1 pound acetate of lead, and to this add gradually caustic potassa or soda, until the precipitate formed be redissolved, taking care not to add more alkali than is required for this solution; work the goods in this for 30 minutes; wring out, and work for 15 minutes in another tub of water to which 8 ounces bichromate of potassa has been added in solution; wring out, wash and dry. 2 or 3 ounces sulphate of zinc may be added to the chrome solution with good effect. If a deep red amber be required, add to the chrome solution ½ pint muriatic acid.

188. Chrome Green.

Dye a blue by the process described in No. 131; then dye a yellow according to the last receipt. The depth of the blue and yellow will regulate the tint of green.

The principal difficulty is when a particular depth or shade of green is wanted, to ascertain the exact shade of blue to be given, as blue cannot be added upon the yellow. This is a matter which can only be learned by practice.