| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a solid-writing material excellent in practical property, capable of thermally changing the color of a hand by a friction, capable of memorizing and holding the states before and after the color change interchangeably in a normal temperature region and equipping a function of holding the color-changed state of the hand under the normal temperature. <P>SOLUTION: This solid-writing material is obtained by holding a reversible thermochromic composition in a formable wax as a dispersed state and forming is provided with that the composition shows a large hysteresis characteristic on a color density-temperature curve and also an interchangeability between a first color and second color, and having -30 to 0°C range color development temperature and 45 to 95°C range completely achromatizing temperature. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
