| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a color developing laminate capable of confirming validity and prohibiting illegal printing. <P>SOLUTION: The color developing laminate includes a plurality of sheet base materials comprising at least three layers that include a color developing sheet base material that can develop a color by laser beams. A black or deep color surface colored part is provided on or in the layer of the sheet base material on one surface side, and the color developing sheet base material has a laser coloring part that develops black or deep color. In a normal line direction of the sheet base material, the laser coloring part overlaps with at least a part of the surface colored part, and one or more of light-transmitting sheet base materials in a visible light region are interposed between the surface colored part and the laser coloring part. <P>COPYRIGHT: (C)2013,JPO&INPIT |
