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Jet Black

The goods are dyed in the same manner as the last receipt; but along with the logwood is added 1 pound fustic. catechu prepared according to No. 96; wring out, and then work for half an hour in a hot solution of 6 ounces bichromate of potassa; wash from this in hot water. If a little soap be added to the wash water, the color is improved.

Deeper shades of brown may be dyed by repeating the operation.