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The dye was used for imperial manuscripts on purple parchment, often with text in silver or gold, and porphyrogenitos or "born in the purple" was a term for Byzantine offspring of a reigning Emperor. The color matched the increasingly rare purple rock porphyry, also associated with the imperial family.
The classic book about woad is The Woad Plant and its Dye [38] by J. B. Hurry, Oxford University Press of 1930, which contains an extensive bibliography. [39] A method for producing blue dye from woad is described in The History of Woad and the Medieval Woad Vat (1998) ISBN 0-9534133-0-6. [40] Woad is biodegradable and safe in the environment.
In Burmese and Thai cuisines, the flowers are also dipped in butter and fried. It is also used to colour the Nyonya dish Pulot tartal. [18] Butterfly pea flower tea is made from the ternatea flowers and dried lemongrass and changes color depending on what is added to the liquid, with lemon juice turning it purple. [19]
The "rare and unusual" cactus flower is being studied by Cambridge scientists and an artist. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: 800-290 ...
Turkey red was a strong, very fast red dye for cotton obtained from madder root via a complicated multistep process involving "sumac and oak galls, calf's blood, sheep's dung, oil, soda, alum, and a solution of tin." [5] Turkey red was developed in India and spread to Turkey. Greek workers familiar with the methods of its production were ...
The flowers of the 'Hopi Red Dye' amaranth were used by the Hopi (a tribe in the western United States) as the source of a deep red dye. Also a synthetic dye was named "amaranth" for its similarity in color to the natural amaranth pigments known as betalains. This synthetic dye is also known as Red No. 2 in North America and E123 in the ...