3 lbs. alizarin paste (10 per cent.); 10 quarts purple thickening; 6 oz. pyrolignite of lime, at 18° Tw.; 12 oz. acetate of lime, at 25° Tw.
The printed goods are steamed for an hour or two, and then aged from twenty-four to thirty-six hours. They are then padded in the chalk and arseniate of soda bath; after which they are washed and soaped in a single soap-bath without tin crystals; and, if needful, cleaned in a weak solution of bleaching powder.
Thickening for Reds.
12 lbs. wheat starch; 40 quarts water; 4 quarts acetic acid, 99 Tw.; 11⁄4 lbs. gum tragacanth; 2 lbs. olive oil.
Boil well together, and stir till cold.
Thickening for Purple.
10 lbs. starch; 27 quarts water; 3 quarts acetic acid; 11⁄8 lbs. gum tragacanth; 2 lbs. olive oil.
Boil well together, and stir till cold.
The mordants in the above recipes are prepared as fellows:
Acetate of Alumina.