1835.] 



Calico- Printing . 



171 



When this process was first put in practice, the edges of 

 the holes in the lead were left sharp, the consequence of 

 this was, that the violent pressure to which they were sub- 

 jected caused them to cut the cloth, so that the whole 

 spots soon fell out, leaving holes in their place. This was 

 ascribed to the corrosive effect of the chlorine, whereas, it 

 was in reality owing to the bad construction of the leaden 

 plates. Henry Monteath & Co. were the first persons who 

 manufactured these handkerchiefs, or bandanas, as they are 

 called, and they realized by them a very large fortune. 



19. Two Turkey-Reds and White. 



iSS 4& 



This is an improvement on the original bandanas described 

 in the last paragraph. The two reds are dyed at the same 

 time ; difference in the tint is owing to the aluming, a much 

 greater portion of the alumina, being fixed upon those parts 

 of the cloth that are to have the deep red than those that are 

 to receive the light red. The white flowers and sprigs are 

 produced by discharging the dye. The method of doing 

 this was originally contrived in France. Mr. Thomson of 

 Primrose Hill, near Clitheroe, took out a patent for it about 

 eighteen years ago, which having now expired, the process 

 is open to every person. To accomplish it, a solution of 

 tartaric acid thickened with gum-senegal, is printed in the 

 usual way upon those parts of the cloth that are to be 

 white. The cloth is then passed slowly through a solution 

 of chloride of lime. The acid disengages the chlorine from 

 the bleaching liquor, and the free chlorine discharges the 

 colour. The cloth is immediately passed through pure 

 water to prevent the discharge from spreading. 



