596

DYEING AND CALICO PRINTING.

No. 6. Blue-black Discharge .—

Logwood liquor, at 8“ Tvv. 3 gals.

Gall liquor, at g° Tw. 7 „

Starch.20 lbs.

Boil and add whilst still hot—

Yellow prussiate. 2J lbs.

When cold add—

Muriate of iron, at 6o° Tw. 3 quarts.

Nitrate of iron, at 80° Tw. 3 ,,

No. 7. Black .—

Logwood liquor, at 8° Tw. 7 gals.

Pyroligneous acid . 1 gal.

Starch. 10 lbs.

Boil and add—

Copperas . 2 lbs. 10 ozs.

Boil again, cool, and add—

Nitrate of iron, at 8o° . 3i pints.

Blue paste (see below) . 1 gal.

No. 8. Bltie Paste .—

a. Copperas . 6 lbs.

Water. 2 qts. Dissolve.

b. Prussiate of potash. 4 lbs.

Water. 1 gal.

Mix a and b together, and add—

Standard red liquor . 1 quart.

Nitric acid, at 6o° Tw. 1 quart.

No. g. Blue Discharge (Machine ).—

a. Prussian blue . 1 lb.

Oxalic acid. 1 ,,

Hot water . 1 quart.

Grind finely up together, and allow to stand for twenty-four hours.

b. Water. 3 quarts.

Starch. ij lbs.

Boil and add—

Tartaric acid. 2 lbs.

Mix a and b together.

No. 10. Blue Discharge .—

Tartaric acid . 5 lbs.

Water.■. 1 gal.

Tin pulp . 1 „

Double muriate, at 120° Tw.2 gals.

Gum tragacanth water . 2 ,,

No. 11. Blue Discharge .—

Oxalic acid .. 8 ozs.

Tartaric acid . 4J lbs.

Yellow prussiate. 2 „

Copperas . 2 ozs.

Starch. 1 lb.

Gum tragacanth. 2 ozs.

Water. 3 quarts.