CALICO-PRINTING 



617 



sept away from the steam of the colour-house. Near the colour-house should be a 

 well appointed laboratory, where drugs can be tested and experiments made. 



370 



371 



Formerly, all the decoctions and mordants used in print-works were made on .the 

 spot ; but the trade having very much extended, the manufacture of the various 

 mordants and decoctions of dyewood is now a separate business, and printers can be 

 supplied with these articles at the same or in some cases a lower rate than they could 

 be produced for on the works, the quality also being uniform and good. The printer 

 now only makes for himself a few unimportant articles. The province of the foreman 

 colour-maker, who is generally a well-paid and responsible servant, is to combine 

 these primary materials so as to form the different colours required for the different 

 styles of work ; as the taste of customers varies, he is required to be able to make any 

 given variation of shade at will, and be able to judge of the quality of the various 

 materials submitted to him. The ordinary decoctions that are kept in stock in the 

 colour department are : 



Logwood liquor. 

 Peachwood liquor. 

 Sapan liquor. 

 Quercitron-bark liquor. 

 Gall liquor. 



Persian-berry liquor. 

 Cochineal liquor. 

 Fustic liquor. 

 Catechu liquor. 



And the various mordants and solutions are : 



Red liquor, or acetate of 



alumina . 

 .Iron liquor, or acetate of 



iron. 

 Buff liquor, or pyrolig- 



nito of iron. 

 Pernitrato of iron. 

 Permuriate of iron. 

 Protomuriato of iron. 



Protochloride of tin in 

 solution. 



Oxy muriate of tin in solu- 

 tion. 



Nitrate of copper in solu- 

 tion. 



Acetate of copper in solu- 

 tion. 



Lime juice. 



Ammonia liquor. 



Ammoniacal cochineal 



liquor. 



Extract of indigo. 

 Extracts of madder. 



Acetic acid. 

 Pyroligneous acid. 

 Nitric acid. 

 Muriatic acid. 

 Sulphuric acid. 

 Caustic-soda liquor. 

 Caustic-potash liquor. 

 Aniline hydrochlorate. 

 Aniline. 



