French purple

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English

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Noun

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French purple (usually uncountable, plural French purples)

  1. A dyestuff obtained from certain lichen known as orchella weeds, used for colouring woollen and silken fabrics, without the aid of mordants.[1]

See also

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References

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  1. ^ 1839, Andrew Ure, A Dictionary of Arts, Manufactures, and Mines
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