Yellow from Persian Berries and Alum Mordant. 455 



The proportions are 8 lbs. cloth, 1 lb. Persian berries, and 

 3 lbs. bran. 



Dyeing. — In this there is no great difficulty ; as the dye 

 does not readily become parti-coloured. The berries and 

 the bran are first boiled with a little water, and much cold 

 water is then to be added, and the well-moistened cloth 

 placed in the solution. The solution can always be heated 

 to the point of ebullition. The presence of the bran pre- 

 vents any injurious effects from a boiling temperature. 



Clearing. When the cloth is passed through warm soap- 

 suds, consisting of 200 lbs. water and 1 lb. soap, the cotton 

 acquires more lustre and more permanence. 



Tin mordant, No. 1, gives the dye more orange, when 

 the cloth is placed in a mixture of 1 lb. tin mordant, No. 

 1, and 1000 lbs. water. 



Properties of berry yelloio. This colour is one of the most 

 permanent yellow colours known. It withstands the ac- 

 tion of light and air for a considerable time. 



Boiling soap-suds extract from the cloth very little of 

 the dye, while the water is strongly coloured yellow. 



Solution of potash makes brownish yellow spots, which 

 vinegar converts into greenish yellow. 



Lime wader acts like potash. 



Ammonia does not change the colour, but dissolves some 

 of it, and becomes yellow. 



Vinegar produces no action. 



Lime juice forms spots like dark quercitron yellow, which 

 ammonia completely restores. 



Tin mordant, No. 1, colours those places on which it is 

 printed, orange yellow. 



Tin mordant, No. 2, does the same, only in a weaker de- 

 gree. 



Solution of chloride of lime (1 chloride to 40 water) does 

 not destroy the colour, but renders it brown. When apiece 

 of cloth is allowed to remain a quarter of an hour in the 

 solution, the brown colour becomes brighter, until the 

 shade attains that of a clear yellow rust colour. 



\ 

 ( To be continued.) 



