| 摘要 |
<p>PURPOSE:To obtain a water-base pigment ink improved in lubricating properties and decreased in pen point abrasion by mixing a pigment with a dispersant, a specified substance and water. CONSTITUTION:2-30wt.% at least one pigment selected from among an azo pigment, a condensed polyazine pigment, a phthalocyanine pigment, a quinacridone pigment, etc., is mixed with 2-20wt.% dispersant (e.g. styrene/maleic acid copolymer salt), 0.05-5wt.% substances of formula I (wherein at least two of R1-4 are each an alkali salt of COOH, and the rest are hydrogen atoms) and/or formula II [wherein three of R1-4 are PO(OH)2, and the rest are alkali salts of COOH] and optionally an antifreezer, an antiseptic, a mildewproof rust preventive, etc., and water, and the mixture is ground by mixing.</p> |
