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Iron Buff or Nankeen
Take 2 pounds copperas, and dissolve in warm water, then add the requisite quantity of water for working the goods; work in this for 20 minutes; wring out, and put immediately into another vessel filled with lime-water, and work in this for 15 minutes; wring out and expose to the air for half an hour, when the goods will assume a buff color. If the color is not sufficiently deep, the operation may be repeated, working through the same copperas solution, but using fresh lime-water each time.
The goods should be finally washed through clean warm water and dried. 136. Nankeen or Buff Dye for Cotton Goods. To a tub of hot water add 1 pint nitrate of iron, and work in this for half an hour 10 pounds cotton previously bleached (see No. 125); wash out in water, and dry.
This process is simple and easy, and produces a permanent dye. 137. General Receipts for Dyeing Cotton. In the following receipts, the quantities are given for 10 pounds cotton, whether minutes; wring out and wash through cold yarn or cloth. For more or less cotton, the water, in which is dissolved 1 ounce of alum; quantities can be increased or diminished in wring out and dry. For lighter or darker proportion; but when small articles are to be shades of blue, use less or more of the iron dyed-such as ribbons, gloves, &c. -a little and ferrocyanide; or, should the color be too more of the materials may be used in proporlight after passing through the process de- tion to advantage. Where washing is referred scribed, add 1 ounce more ferrocyanide, repeat to, it is always in cold water, unless otherthe operation through the same tubs, and the wise specified. shade will be deepened nearly double.