| 摘要 |
<p>PURPOSE:To provide a water based ink for ink jet recording, which has excellent image clarity, image dryness, shelf stability, ejection stability and ejection response, containing at least one water-soluble dye represented by a specified chemical formula. CONSTITUTION:The titled water based ink contains at least one water-soluble dye of the formula (wherein R is H, alkyl, acyl, unsubstituted or substd. benzoyl, unsubstituted or substd. benzenesulfonyl; R1 is H, alkyl, alkoxy, carboxyl, halogen, sulfo group; Z is N, O, S and combined together with a benzene ring to form a five- or six-membered ring, Z may be 1 or more and when a plurality of Zs are used, atoms may be the same or different; M is H or a cation such as sodium, potassium, lithium or an org. amine; n is 1, 2, 3).</p> |
