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14Purple colours are also made by tinging chalk with madder-root and hysginum. Divers colours are also made from flowers. Thus, when dyers are desirous of imitating the Attic ochre, they put dry violets into a vessel, and boil them. When so prepared, they pour the contents of the vessel on to a cloth, and, squeezing it with their hands, receive in a mortar the water thus coloured by the violet, and then, mixing Eretrian earth with it, and grinding it, the colour of Attic ochre is produced.
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