alkali blue
noun
1
: any of various alkali-soluble triphenylmethane dyes that are essentially sodium salts of monosulfonic acids of phenylated pararosaniline and are used chiefly in making pigments
2
: any of the fairly permanent pigments made from an alkali blue dye and used chiefly in printing inks
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“Alkali blue.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/alkali%20blue. Accessed 26 Nov. 2024.
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