acid fastness

  • 31anthraquinone dye — noun : any of a large class of dyes (as mordant, acid, acetate, and vat dyes) derived from anthraquinone and noted for their fastness see dye table I * * * Chem. any of the class of dyes derived from anthraquinone, used for dyeing textiles, esp.… …

    Useful english dictionary