| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide india ink-like composition which contains dye as a coloring agent and can be washed off stain on nylon fiber.SOLUTION: In india ink-like composition containing water and acid dye, pH is adjusted to an alkaline region by containing fatty amine. The acid dye becomes hard to be dyed to fiber by making the pH of the india ink-like composition alkaline region by the fatty amine. Because the fatty amine prevents absorb of the acid dye to amino group of polyamide fiber, the india ink-like composition becomes easy to wash off and erasability by washing is improved.</p> |
