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Basic dye

a dye soluble in acid and insoluble in basic solution, consisting mostly of amino or imino compounds of xanthene or triarylmethane: used mainly for inks, carbon paper, and typewriter ribbon.
Historical Examples

If there is a precipitate there is a basic dye, if not, an acid dye.
The Manufacture of Paper Robert Walter Sindall

This is effected by the judicious addition of a suitable acid dye to the pulp already coloured with the basic dye.
The Manufacture of Paper Robert Walter Sindall

basic dye n.
Any of various usually synthetic dyes that produce brilliant colors, react as bases, and are usually used as stains. Also called basic stain.


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