| In winter they are passed through a slightly chalky water, then washed at the wheel, and dyed in quercitron or weld. |
| Yellow dyes are chiefly given us by weld, quercitron bark, and old fustic, an American dye-wood. |
| Yellow dyes from native lichens and tree bark were replaced by Old Fustic, a flowering plant, and quercitron bark, both from North America. |
| Under the deep-furrowed, brown surface bark is a yellow layer, rich in tannin, and a dyestuff called quercitron. |
| A very minute proportion of quercetin, a principle yielded by quercitron bark, has been obtained from catechu. |
| If a dead black is wanted, add some decoction of quercitron or turmeric to the bath. |
