Impregnate with brown oxide of iron, and then dip in a bath of quercitron bark.
"Enquire Within Upon Everything" by Anonymous
QUERCITRON, a yellow dye obtained from the bark of a North American oak.
"The Nuttall Encyclopaedia" by Edited by Rev. James Wood
Quercitron, which should be brought slowly to the boil and boiled for a few minutes only.
"Vegetable Dyes" by Ethel M. Mairet
The American quercitron bark gives us also a useful additional yellow dye.
"Arts and Crafts Essays" by Various
The same mordants, with a dye of quercitron bark, give yellow and olive or drab.
"Popular Technology, Vol. I (of 2)" by Edward Hazen