| 摘要 |
PURPOSE: To realize fresh printing record by using specific imino compound as thermal color developing ingredient and aromatic isocyanate compound as developer ingredient of unreacted material in solvent type gravure printing ink for printing a non-absorbent support at a high speed by utilizing a laser heat mode. CONSTITUTION: In solvent type gravure printing ink for printing a support at a high speed, as imino compound represented by a formula I is used as a thermal color developing ingredient, and aromatic isocyanate compound is used as developer ingredient of unreacted material, and sensitizer for absorbing infrared laser to heat is contained. In the formula I, Φ is aromatic compound residue capable of forming conjugation with adjacent C=N. As the aromatic isocyanate, 2,5-dimethoxy-4,4',4"-triisocyanatetripheylamino represented by a formula II is used. As the binder of the printing ink, silicic acid anhydride sol is sued, and as the sensitizer, cerium oxide is used. |
