Important: Safety Warning
This page describes trade processes that use dangerously toxic materials such as cyanide solutions, mercury amalgams, or strong acids. These processes require training, equipment, and precautions far beyond what the text describes.
This information has been left in for historical purposes but should not be acted upon.
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To Dye Aniline Scarlet
For every 40 pounds of goods, dissolve 5 pounds Brown. Cotton requires mordanting with white vitriol (sulphate of zinc) at 180c Fahr., sumach and acetate of alumina, and is dyed in place the goods into this bath for 10 minutes, a bath under 100° Fahr., prepared according then add the color, prepared by boiling for a few to No. 2591. By the use of bichromate of potminutes, 1 pound aniline scarlet in 3 gallons ash redder shades may be obtained. The usual water, stirring the same continually. This color inclines to cinnamon. solution has to be filtered before being added to the bath. The goods remain in the latter for 15 minutes, when they have become browned, and must be boiled for another half hour in the same bath, after the addition of sal ammoniac. The more of this is added the redder the shade will become.