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A practical handbook of dyeing and calico-printing / by William Crookes
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i°3

RANDOMS, OR CLOUDED YARNS.

Prussian Blue Random.

The yarn must be unbleached. Soak the yarn in the dilute muriate of tinbath; and prepare the kettle with 4 lb. red prussiate of potash (to every 15 lbs.of yarn), adding 4 lb. of sulphuric acid and 1 lb. of muriate of tin. Heat to120° F., and enter the yarn, raising the bath to the boiling-point in the courseof an hour. Remove, cool, and expose to the oxygen of the atmosphere forseveral hours ; then rinse. Should the yarn show green spots a few minutessteaming will remedy the defedt.

Magenta Random.

Half an ounce of magenta crystals (to 20 lbs. of unbleached yarn) dissolvedin a bath heated to 170° F. Treat as for Saxon blue; rinse quickly, andbleach in the sulphur-house. Rinse again in cold water.

Purple Random.

For 20 lbs. of yarn. Soak the yarn in water acidified with sulphuric acid(1 lb. of acid to 6 pails of water). Then enter it in a bath containing 4 oz. ofaniline purple dissolved in hot alcohol, to which is added 1 lb. of acetic acid.Heat to 160° F., and enter the yarn in one lot. The yarn should be bleachedafter colouring.