| 摘要 |
PURPOSE:To provide an ink which has excellent water resistance and is free from bleeding on a recording material having exposed fibers, and has excellent fixability and which comprises a water-soluble pigment, an aq. liq. medium capable of dissolving the pigment, and a particular compd. having a three- dimensional structure. CONSTITUTION:A desired ink is obtd. by adding a compd. with a three- dimensional structure having an MW of at least 100 and having pores therewithin to an ink for ink jet recording which comprises a water-soluble pigment as a component capable of forming an image and, as another component, an aq. liq. capable of dissolving the pigment. Representative examples of the compd. with a three-dimensional structure include deoxycholic acid, natural valinomycin antibiotics, and phenylurea oligomers. The aforesaid compd. is added in an amt. of 0.1-20wt.% based on the total wt. of the ink. When the amt. of the compd. is less than 0.1wt.%, any advantageous effect cannot be exhibited with respect to the fixability, printing quality and ejection stability improvement. On the other hand, an amount of larger than 20wt.% unfavorably brings about an increase in the viscosity of the ink and the clogging. |
