Natural dyes come from many parts of plants: roots, leaves, bark,
fruits.The dye sources in the ancient world included such plants
as madder for red, saffron and weld for yellow, woad for blue.
The bark of oak outer shells of fresh walnuts,pomegranate flowers,
dyer's bugloss were among others used.Gall-nuts, woody swellings
caused by attack of gallflies, presumably on the Lusitanian oak
later provided both a dye (brown, gray,and black)
and a mordant in the form of a tannin.
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