| 摘要 |
<p>PURPOSE:To improve the washing fastness of an oil-based ink containing a basic dye without degrading the characteristic features of the ink, by adding a specific amount of tannic acid to the ink. CONSTITUTION:An oil-based ink containing preferably 1-20(wt)% basic dye or dye produced by making a basic dye soluble in oil and preferably 70-98.9% ethylene glycol monomethyl ether, diethylene glycol monoalkyl ether, etc., is added with 0.1-10% tannic acid.</p> |
