500 CALICO PRINTING. 



for orpiments, as it is equally efficacious in disoxy- 

 genating the indigo, and will also serve instead 

 of gum. 



Some calicoes are printed only with one colour ; 

 others have two ; others three, or more, even to 

 the number of eight, ten, or twelve. The smaller 

 the number of colours, the fewer are the processes. 

 To give an example where six colours are used. 



1. A nankeen yellow, of various shades down to 

 a deep yellowish brown or drab, is given by acetite 

 of iron put on with gum or paste, and afterwards 

 plunged into the potash ley. 



2. Yellow, by a mordant of acetite of alumine, 

 the dyeing by quercitron bark and bleaching. 



3. Red, by the last process, only madder is sub- 

 stituted for the bark. 



4. Light blue is given by making a block for all 

 those parts that are to be white, and printing by 

 it on the cloth a composition of which wax is the 

 principal ingredient, or pipe- clay and paste. The 

 cloth is then dyed in a cold indigo vat, and the 

 wax removed by hot water. 



5. Lilac flea-brown, and blackish brown, are 

 given by acetite of iron, and dyeing afterwards 

 with madder. 



6. Dove-colour and drab, by acetite of iron and 

 quercitron bark. 



The same mordant will frequently do tor several 

 colours. Thus, suppose one part of the cloth 

 should be printed with acetite of alumine, another 

 with acetite of iron, and a third with a mixture of 

 these two mordants, and the whole afterwards dyed 

 with quercitron bark ; then the following colours 

 would appear, viz. yellow, drab, olive ; and various 

 depths of shade will be given by varying the pro- 

 portions ot" iron in the mordant. 



