| 摘要 |
<p>PURPOSE:To obtain an IR radiation transmitting ink composition having a visually same color with a black ink using a carbon as a pigment, optical absorptions in a visible region and no absorption in an IR region, and resistances represented by a light fastness. CONSTITUTION:This infrared radiation transmitting ink composition comprises consisting of prepolymers, monomers, photopolymerization initiators and adjuvants, and containing 70.0-90.0wt.% UV radiation curing resin component or an oxidative polymerizable resin, and 10.0-30.0wt.% coloring material composed of a fine powder of bismuth sulfide having <=0.50mum particle diameter.</p> |
