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THERMAL COLOR DEVELOPING MATERIAL, THERMAL COLOR DEVELOPING ELEMENT, ITS MANUFACTURE, LAMINATE FOR FORMING THERMAL COLOR DEVELOPING ELEMENT, AND ITS MANUFACTURE
THERMAL COLOR DEVELOPING MATERIAL, THERMAL COLOR DEVELOPING ELEMENT, ITS MANUFACTURE, LAMINATE FOR FORMING THERMAL COLOR DEVELOPING ELEMENT, AND ITS MANUFACTURE
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机译:热彩色显影材料,热彩色显影元件,其制造,形成热彩色显影元件的层压板及其制造
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摘要
PROBLEM TO BE SOLVED: To provide a thermal color developing element for irreversibly color developing even in a low temperature range by utilizing a surface plasmon absorption of metal fine particles. ;SOLUTION: Metal fine particles are generated by a photoreduction of metal ion dispersed in a solid matrix 1 having a melting point in a low temperature range. An aggregation of the particles 2 dispersed in the matrix is suppressed in the state that the matrix 1 is sold. However, when the ambient temperature rises so that the matrix is liquefied, the particles 2 are aggregated to increase its particle size to become particles 12, and exhibit a color developing by a surface plasmon absorption. Since the particles 2 are irreversibly aggregated, even if a temperature drops after the color developing, its color is not erased, thereby visually recognizing its heat history.;COPYRIGHT: (C)2000,JPO
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