quercitron

In winter they are passed through a slightly chalky water, then washed at the wheel, and dyed in quercitron or weld.

A very minute proportion of quercetin, a principle yielded by quercitron bark, has been obtained from catechu.

Some of the latter is so deficient as to afford colours nearly as fugitive as those of Brazil wood and quercitron.

According to Bancroft, Quercitron is the yellow above all others for dyeing greens.

The same mordants, with a dye of quercitron bark, give yellow and olive or drab.