| 摘要 |
PURPOSE:To provide a jigsaw puzzle and a sheet member in which colors are changed with a set temperature as a boundary by a thermochromism effect to display two kinds of patterns and a specified part emits light. CONSTITUTION:In a jigsaw puzzle formed by plural pieces 2 which can be connected to each other, a part of a pattern of a picture, a photo and so on is applied to the surface of each piece 2, and at least a part of a pattern of a picture, a photo and so on of each piece 2 is formed by a reversible temperature-sensitive color change coloring matter and a luminous material. The colors are changed by the temperature of the periphery and a part formed by the luminous material is caused to emit light. The change of colors is such that when it is lower than the set temperature, a color change layer 22 forms a color, and when it is higher than the set temperature, it loses a color. That is, if the temperature of the periphery is lower than the set temperature, mixed colors of the colors of the pattern and the color change layer 22 appear, and if the temperature of the periphery is higher than the set temperature, the colors of the pattern appear so that two kinds of patterns are displayed, with the set temperature as a boundary. |
