| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a solid writing body excellent in a practicality, with a function capable of: thermally changing the color of a handwriting easily by friction, wherein the handwriting memorizes and holds the states before and after the color change interchangeably in a normal temperature region; and holding the color-changed state of the handwriting under the normal temperature. <P>SOLUTION: The solid writing body is obtained by holding and molding a reversible thermochromic composition in an excipient in a dispersed state. In the solid writing body, the composition shows large hysteresis characteristics with respect to a color density-temperature curve and exhibits an interchangeability between a first hue and a second hue, a coloring starting temperature is within a range of -30 to 0°C and a completely colorless temperature is within a range of 50 to 90°C. <P>COPYRIGHT: (C)2013,JPO&INPIT |
