| abstract |
(57) [Abstract] [Purpose] Regarding a recording ink used for ink jet recording, a recording ink that can obtain stable and high-quality printing quality regardless of the recording paper and has no safety problem provide. The recording ink is characterized by containing 1.5 to 8% by weight of partially saponified polyvinyl alcohol and 5 to 20% by weight of ethanol, and the degree of polymerization of the partially saponified polyvinyl alcohol is 100-100 0, the saponification rate is 55 to 85%. [Effect] The recording ink according to the present invention ensures safety in handling, and is stable and stable even on plain paper, which is made of natural pulp and has high hydrophilicity and water absorption, similar to the printing on special paper for inkjet. There is an effect that high quality printing is possible. |