| 摘要 |
An ink-jet printing dye-fixing agent is provided which comprises a quaternary cationic polymer having the main chain represented by general formula (1):where R1, R2, R3, and R4 are independently an aliphatic alkyl group of 1 or 2 carbons; R is an aliphatic alkylene group of 1-6 carbons or a phenylene group; and n is an integer of from 3 to 300. A recording paper sheet employing the fixing agent is also provided. This fixing agent has excellent ink dye fixability, and makes ink coloring excellent and improves water resistance of the printed matter.
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