ARTIFICIAL ALIZARIN.

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reader is referred to the sedtion on the madder colours, where also will befound a specimen dyed with artificial alizarin for comparison with aTurkey red.

The following recipes for printing with artificial alizarin will be founduseful:—

Reds.

5 lbs alizarin paste (10 per cent);

16 lbs. thickening;

1 lb. acetate of alumina, at 15 0 Tw.;J lb. acetate of lime, at 25° Tw.

Pinks.

The same, diluted with 2 or 3 parts of thickening.

For double printing, when deep red is printed on first, the goods must besteamed one hour before the second printing takes place. After the secondprinting the goods are again steamed for one hour and aged for twenty-fourhours; they are then passed through one of the following baths, at from 120°to 140° F., remaining in the bath not longer than 1 to ij minutes :—

250 gals, water;

60 lbs. chalk;

3 lbs. tin crystals.

Or 250 gals, water ;

40 lbs. chalk;

10 lbs. arseniate of soda.

The goods are then washed and cleared as followsTake for 10 pieces of50 yards each—

1st soaping, at 120° F., 3 lbs. soap; i lb. tin crystals.

2nd ,, at 160 0 F., 3 lbs. soap.

3rd „ at 175° F., 3 lbs. soap.

Wash between each soaping.

Red for Mosaics.

8 lbs. alizarin paste (10 per cent) ;

10 quarts thickening;g$ ozs. nitrate of alumina, at 23 0 Tw. ;ig ozs. acetate of alumina, at 15° Tw.

13 ozs. acetate of lime, at 25° Tw.

Or 10 lbs. alizarin paste (10 per cent)

10 quarts thickening;

13 ozs. nitrate of alumina, at 23 0 Tw.ig ozs. acetate of alumina, at 15° Tw.

16 ozs. acetate of lime, at 25° Tw.

Another Red without Oil.

8$ lbs, alizarin paste (10 per cent) ;gi lbs. acetic acid, at 12 0 Tw.;

3i lbs, wheat flour ;

5 pints water.

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