Few, if any, of the natural dyestuffs are resistant to external influences, such as light; they do, however, fade at different rates. Upon fading, they either darken or undergo a change in hue.
Some of the natural dyestuffs are: blues—indigo, woad, chemic, and Prussian blue; reds—madder, cochineal, brazilwood, alkanet, annatto, and safflower; yellows—fustic, quercitron, dock, goldenrod, sassafras, and tumeric; browns—butternut, catechu, alder, and hemlock; purples—orchil and cudbear; blacks—logwood; and neutral colors—barks of various trees, including birches and oaks, galls and sumac. (4 )
Timestamp: Saturday, 19-Nov-2011 13:18:43 PST
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