direct dye(n = noun.substance) substantive dye - dye with a high affinity for cellulose fibers (cotton or rayon etc.);
is a kind of dye, dyestuff

acid dye, aniline dye, azo dye, basic dye, cyanine dye, direct, direct action, direct antonym, direct contrast, direct correlation, direct current, direct discourse, direct evidence, direct examination, direct fire, direct flight, direct line, direct loan, direct mail, direct mailer, direct marketing, direct object, direct primary, direct quotation, direct sum, direct support, direct supporting fire, direct tax, direct tide, direct transmission, direct trust, double dye, dye, fast dye, fluorescent dye, foreign direct investment, hair dye, joint direct attack munition, lac dye, metallized dye, radiopaque dye, stage direct, substantive dye, vat dye