The dyeing was then followed by steaming and soaping.
For red on white grounds and for red grounds, a mordant of red liquor at
5 deg. to 6 deg. B. is printed on, with a little salt of tin or nitro-muriate of
tin. It is fixed by oxidation at 30 deg. to 35 deg. C., and dunged with cow-dung
and chalk. The pieces are then dyed with 1 part alizarin for reds at 10
per cent., 1/4 to 1/2 oil for reds (containing 50 per cent.), 1-6th part
acetate of lime at 15 deg. B., giving an hour at 70 deg. and half an hour at the
same heat. Wash, pad in oil (50 to 100 grms. per liter of water), dry on
the drum, or better, in the hot flue, and steam for three-quarters to an
hour and a half. The padding in oil is needless, if sufficient oil has
been used in dyeing, and the pieces may be at once dried and steamed.
Wash and soap for three-quarters of an hour at 60 deg.. Give a second
soaping if necessary. If there is no fear of soiling the whites, dye at
a boil for the last half-hour, which is in part equal to steaming.
Red pieces and yarns may be dyed by the process just given for red
grounds; or, prepare in neutral red oil, in the proportion of 150 grms.
per liter of water for pieces and 15 kilos for 100 kilos of yarns. For
pieces, pad with an ordinary machine with rollers covered with
calico. Dry the pieces in the drum, and the yarn in the stove. Steam
three-quarters of an hour at 11/2 atmosphere.
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