Stabilized stain composition

摘要

Formulations of a cationic dye component (e.g., Azure A-Azure B-Azure C mixtures), an anionic dye component (e.g., Eosin Y) and an alcohol solvent (e.g., methanol or methanol-glycerol mixtures) are stabilized by an amino acid or its acid addition salt (e.g. lysine hydrochloride or glycine or a mixture of these).