M. TECHNOLOGY. 505 



part of it in 20 parts of strong alcohol, or in 10 parts of alco- 

 hol and 10 of acetic acid, and continue boiling with constant 

 stirring for a quarter of an hour, then diluting with water, 

 and passing through a hair sieve (or, instead of this solution, 

 aniline blue soluble in water would be better). For greater 

 certainty, it is best to add the alcoholic solution of aniline 

 blue, or the proper quantity of that soluble in water, in two 

 portions, and to work the goods in the boiling bath for half 

 an hour after each addition. The color is finally improved 

 and preserved from rubbing off by passing the goods through 

 a cold soap or bran bath. 23 C, March 16, 1874, 109. 



YELLOW OX SILK GARMENTS. 



Boil the articles, for half an hour, in Marseilles soap, with 

 the addition of wheat bran; then rinse, and dye to a buff in 

 a bath of soap and annatto, lift, and pass through a sulphuric- 

 acid bath of ^ Beaume, in which they will acquire a beauti- 

 ful yellow color. 24 (7, 1874, x., 73. 



VIOLET OIL-PIGMENT FOR PRINTING ON FABRICS. 



Pour alcoholic solution of violet aniline B. B. upon finely 

 powdered chalk in a saucer, stir well with a rod, and allow it 

 to dry on a hot plate or in the stove ; then stir to a powder, 

 and again simply moisten it with the aniline solution ; dry 

 again, pulverize, and preserve in a dry place. For use, rub 

 some with zinc-white, according to the shade desired. The 

 pigment is rich, and prints well, but is not permanent in the 

 air with ordinary usage, and the best B. B. must therefore 

 be employed, of a greenish cast, like diamond fuchsine. With 

 this the oil color wears as well as much more expensive 

 ones. 26 C, 1874, vi., 54. 



A FAST AND EASILY PREPARED BLACK. 



Place the cleaned and washed goods overnight in a cold 

 bath of li pounds of sulphate of iron for five pounds of half- 

 wool goods; drain them off well from this, and work a quar- 

 ter of an hour in a fresh bath with two ounces of ehromate 

 of potash, and rinse well in running water. Then boil for 

 some time, until the bath is spent, in a kettle in which half a 

 pound of sumac and two pounds of logwood have been boiled 

 in a bag, removing the bag if the room is needed, and rinse 



Y 



