| 摘要 |
<p>PURPOSE:To obtain the title ink which has high scratch resistance and water resistance, is free from variation in the quality of print with the kind of paper, is fast drying, and does not cause clogging by incorporating a specified polymer into a composition consisting of water, a coloring component, and a water-soluble organic solvent having a high boiling point and low volatility. CONSTITUTION:The title ink is obtained by mixing water, preferably deionized water, a water-soluble organic solvent having a high boiling point and low volatility (e.g. glycerol), a coloring component (a water-soluble due such as C.I. Direct Black 19, an inorganic pigment such as carbon black, or an organic pigment such as azo pigment), carboxymethylcellulose (preferably having a viscosity of 100mPa.S or lower at ordinary temperature), and a polyvinylpyrrolidone (preferably having a molecular weight of 10,000 to 400,000).</p> |
