236

CALICO-PRINTING.

vat, ten minutes in and ten minutes out each time; but more dips may be given accord-ing to the desired depth of the shade. The cloth must be afterwards rinsed in runningwater for half an hour. The next process is to remove the paste; which is done by winc-ing the goods in a bran bath, lowered to 150°, during twenty minutes. They are thenwinced for five minutes in a bath of water slightly sharpened with vinegar. When wellcleansed they are ready for the madder bath. The lapis goods are finally cleared in abran bath, by exposure on the grass, and a soap boil.

The lazulite style is susceptible of many modifications.

8. Deep blue ground, with light blue, Carmelite , and white figures.

1. Print-on the white reserve, No. 1.

2. Dip in the strongest blue vat; rinse and dry.

3. Ground-in with the block, the Carmelite reserve (containing the mixed acetatesof iron and alumina.)

4. Ground-in the neutral reserve.

5. Dip for the light blue; rinse.

6. Dung, dye, and clear, as above.

By varying the proportions of the reserve mordants, and the dye-stuffs, as madder,quercitron, &c. a great variety of effects may be produced.

9. Deep green ground, with buff and white figures.

1. Print-on the white reserve.

2. Dip in the blue vat; rinse and dry.

3. Pad in the buff liquor, as formerly prescribed.

4. Ground in upon the buff spots, the discharge No. 2, presently to be described.

5. Wash away the paste in chalky water.

6. Wince through a boiling alkaline ley, to raise the buff iron color.

IV. The Discharge style; first, of simple discharges.

1. Discharge for block printing.

Take 1 gallon of lemon or lime-juice, of spec. grav. 1-09, in which dissolveI pound of tartaric acid,

1 pound of oxalic acid, and thicken the solution with

4 pounds of pipe or china clay, and 2 pounds of pulverized gum; as soon as thegum is dissolved, the mixture must be put through a searce.

2. Another discharge is made of half the above acid strength.

3. A third with one half of the solid acids of the second.

4. Take 1 gallon of water, in which dissolve with heat

1 pound of cream of tartar, adding, to facilitate the solution,

1 pound of warm sulphuric acid of spec. grav. 1-7674; after 24 hours mix4 lbs. of pipe or China clay, and three lbs. of gum, with the decanted clear liquor-In some cases British gum is used alone, as a thickener.

5. Discharge for the cylinder machine.

Take 1 gallon of lime-juice, of spec. grav. 1-085; dissolve in it

3 pounds of tartaric acid,"and one pound of oxalic acid ; thicken with6 pounds of gum Senegal, or 5 pounds of British gum. .

6. 7. A stronger and weaker discharge is made of the same materials; and one is ®a

without the tartaric acid.

Second; combination of discharges with mordants.

1. Black, red, lilach, and white figures upon an olive ground.

i white*

The olive being given in a madder bath, and the ground well whitened (see Mapd^u)’

the cloth is padded in a weak buff mordant; and upon the parts that are to remain tthe weakest simple discharge No. 3 is printed-on by the cylinder; (in some works thecharge paste is applied and made dry before padding through the iron liquor;) the goare cleared of the paste in a tepid chalky water, then dyed in a quercitron bath, coning a little glue, and cleared in a bran bath. _ - t j, e

Discharge mordants upon mordants may be regarded as a beautiful modification o

preceding style. Example.

A violet ground or impression, with red and white. r or of

3. Pad with an acetate of iron of 1-004; or print-on with the cylinder, iron hq u1-027 thickened with British gum.

2. Print-on a red mordant, stronuly acidulated with lime-juice of 1*226.

3. Ground in the discharge No. 2; dry.

4. Clear off the paste in chalky water.

5. Dung, madder, and brighten.

6. Ground-in the topical colors at pleasure.

V. China blues.

Take 16 pounds of coarsely ground indigo, and f . ; n 6

4 pounds of sulphuret of arsenic; dissolve 22 pounds of sulphate . ot . 1 lC ein forGallons of water; introduce these three, matters into the indigo mill, and grind t