Olive and Blue.—The dye-bath is made with 1½ lb. Diamine fast yellow A, 2½ lb. Diamine orange DC, ¼ lb. Diamine sky blue, and 1 lb. Alkali blue 6 B, After dyeing rinse, then acidulate as above and wash well.
CHAPTER VII.
OPERATIONS FOLLOWING DYEING.
WASHING, SOAPING, DRYING.
After loose cotton or wool, or cotton and woollen yarns, or piece goods of every description have been dyed, before they can be sent out for sale they have to pass through various operations of a purifying character. There are some operations through which cloths pass that have as their object the imparting of a certain appearance and texture to them, generally known as finishing processes; of these it is not intended here to speak, but only of those which precede these, but follow on the dyeing operations.
These processes are usually of a very simple character, and common to most colours which are dyed, and here will be noticed the appliances and manipulation necessary in the carrying out of these operations.
Squeezing or Wringing.—It is advisable when the goods are taken out of the dye-bath to squeeze or wring them according to circumstances, in order to press out all surplus dye-liquor, which can be returned to the dye-bath if needful to be used again. This is an economical proceeding in many cases, especially in working with many of the old tannin materials like sumac, divi-divi, myrobolams, and the modern direct dyes which in the dyeing operations are not completely extracted out of the bath, or in other words, the dye-bath is not exhausted of colouring matter, and, therefore, it can
be used again for another lot of goods, simply by adding fresh material to make up for that absorbed by the first lot of goods.