| 摘要 |
<p>PURPOSE:To provide the titled ink which exhibits a high color value of dye and does not cause clogging due to crystallization of ink, by dissolving a water- soluble direct dye, a specified wetting agent, an alkanolamine and a solubilizing agent in water. CONSTITUTION:0.5-6.0wt% water-soluble direct dye such as C.I. Direct Black 19, 10-15wt% at least one wetting agent selected from polyethylene glycol, polypropylene glycol, ethylene glycol, diethylene glycol (alkyl ether) and triethylene glycol, 0.5-1.0wt% at least one alkanolamine selected from di- or triethanolamine and propanolamine and 3-7wt% at least one solubilizing agent selected from N-methyl-2-pyrrolidone and sustd. pyrrolidones are dissolved in water. The pH of the mixture is adjusted to 9.5-10.</p> |
