THE FINISHING TOUCH. : Page 140
Brown from Logwood.—Logwood chips boiled in enough water to cover them, for fifteen or
twenty minutes, yield a yellow brown. The rattan is simply soaked in the extract for several hours, or boiled in it, and then dried; no mordant being used.
Purple Shades from Logwood.—The alum mor-dant is used as previously described. The rattan is then dyed a soft purple by soaking it for a few hours, or boiling it, in the extract of logwood, obtained from the chips; or in the extract sold by dye houses, diluted to the right consistency with hot water. The addition of ammonia or baking soda will give a bluer purple.