abstract |
Concentrated storage-stable quaternary styryl dye solutions useful to dye paper, the solutions comprising, by weight, I. 20% TO 40% OF THE DYE <IMAGE> wherein A is an anion, II. 30% TO 50% OF AT LEAST ONE OF ACETIC ACID AND PROPIONIC ACID, III. 10% TO 40% OF AT LEAST ONE ACRYLIC ACID AND METHACRYLIC ACID, AND IV. 3.3% TO 4.5% OF WATER. |