| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain an ink for ink jet stably usable for a long period without causing the clogging of a nozzle, etc., of a recording head or the production of foreign materials by making the ink include an antibiotic substance. SOLUTION: This ink is obtained by including an antibiotic substance (e.g. penicillin G) and preferably further water, a water-soluble dye (e.g. C.I. Direct Yellow) and a high-boiling organic solvent (e.g. diethylene glycol). Furthermore, e.g. the antibiotic substance is preferably contained in an amount of 0.005-0.05 wt.% based on the total amount of the ink and a pigment or a disperse dye, a dispersing agent, etc., in place of the water-soluble dye may be contained.</p> |
