| 摘要 |
PROBLEM TO BE SOLVED: To provide a technique for printing near-infrared absorption patterns that exhibit high contrast when viewed with an infrared camera and superior solvent resistance of dots.SOLUTION: A near-infrared absorption pattern printed sheet 1 comprises a near-infrared absorbing layer 2 pattern-printed on a substrate 3. The near-infrared absorbing layer is pattern-printed using an ink composition containing (a) a near-infrared absorber, (b) an urethane acrylate of a molecular weight of 1000 to 3000 and having nine or ten acryloyl groups, (c) an urethane acrylate of a molecular weight of 30,000 to 70,000 and having two or three acryloyl groups, where a mass ratio of the component (b) and the component (c) is (50-90):(10-50).SELECTED DRAWING: Figure 1 |
