| 摘要 |
PURPOSE:Aqueous ink having extremely improved grab on a nonabsorbing face of paper, glass, a metal, etc. and water resistance, comprising oil-soluble dye, an intramolecular ester of an oxycarboxylic acid, water, and a resin. CONSTITUTION:Aqueous ink at least consisting of oil-soluble dye[spirit black 3,000, etc., preferably 0.3-15wt% based on total ink amount], an intramolecular ester of an oxycarboxylic acid (powerful solubilizing agent, preferably gamma-butyrolactone, etc. having a boiling point of <=300 deg.C, and the amount used is preferably 1-45wt%), water (35-85wt%) and a resin. The resin is soluble in the intramoleular ester of an oxycarboxylic acid but not in water, and it is needed to be compatibilized in a mixed solvent of an oxycarboxylic acid and water. For example, butyral resin, etc. may be cited as the resin, and its amount used is 0.1-20wt%, preferably 0.5-10wt%. Ethyl alcohol, etc. may be further added to the ink to promote solubility. |
