| 摘要 |
PROBLEM TO BE SOLVED: To provide a reversible thermochromic hologram stacked body having a colorful coloring effect capable of clearly visualizing a color change of a reversible thermochromic layer via a hologram image when being visualized from the hologram layer side. SOLUTION: In the reversible thermochromic hologram stacked body 1 made by stacking the reversible thermochromic layer 3 and a transparent type hologram layer 2, color differenceΔE between perfect coloring and perfect discoloring of the reversible thermochromic layer 3 is at least 30. Light transmittance of the transparent type hologram layer 2 is at least 50%. The reversible thermochromic layer 3 contains a microcapsule pigment which incorporates a reversible thermochromic composition comprising: an electron-donating coloring organic compound; an electron-accepting compound; and an organic compound medium which reversibly causes the coloring reaction between the electron-donating coloring organic compound and the electron-accepting compound. COPYRIGHT: (C)2007,JPO&INPIT
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