Democratic Sentinel, Volume 19, Number 42, Rensselaer, Jasper County, 25 October 1895 — Artificial Indigo. [ARTICLE]

Artificial Indigo.

What is known as “indigo salt” is now being introduced as the latest substitute for the genuine article. It is said to possess the property oi being converted into indigo by 7 means of caustijC soda, and, in dyeing, all that is necessary is to treat the cot-, ton in a bath of the salt and then pass the treated cotton into a solution of the soda. The value of this method may be estimated from the statement made that, in printing, it suffices to thicken a solution of the salt with dextrine, print this on, and pass the printed fabric through caustic soda.