| abstract |
Disclosed is an ink composition which comprises water, an anionic dye, and a monoquaternary cationic penetrant of the formula wherein R1 is either a benzyl group or an alkyl group having at least about 3 carbon atoms, R2, R3, and R4 each, independently of the others, are hydrogen atoms, methyl groups, or ethyl groups, wherein two or more R groups can be joined together to form a ring, X is an anion, and n is an integer representing the charge on the anion, wherein the ink exhibits rapid penetration when applied to plain paper. Also disclosed is a set of inks for generating multicolored images which comprises (a) a first ink as described above; and (b) a second ink comprising water and a pigment; wherein intercolor bleed between the first ink and the second ink is reduced. Further disclosed are ink jet printing processes with the ink and ink set described above. |