Indian ink
noun/ˌɪndiən ˈɪŋk/
/ˌɪndiən ˈɪŋk/
(North American English also India ink)
[uncountable]- a very black ink used in drawing and technical drawingWord Originmid 17th cent.: originally applied to Chinese and Japanese pigments prepared in solid blocks and imported to Europe via India.
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Indian ink