| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain an ink composition having specific physical properties, containing a coloring agent treated by metal vaporization, capable of printing clear images or letters on a material to be printed such as cloth, leather or paper and enabling the erasure of them by washing with water. SOLUTION: A coloring agent obtained by dispersing (A) powdery particles having a volume-average particle diameter of about >=1μm, preferably >=7μm, further preferably >=10μm and surfaces treated by metal evaporation in (B) a solvent is used in this ink composition. Further, the metal evaporation treatment is preferably performed using aluminum by vacuum evaporation, spattering, etc. The particles are easily dispersed even in the case where water is used as the component B.</p> |
