| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a thermochromic writing utensil with which an accurate environmental temperature can be obtained. <P>SOLUTION: The thermochromic writing utensil 1 includes a reversible thermochromic layer 3 provided on a surface of a shaft cylinder of the writing utensil, and changes in color according to the environmental temperature. The reversible thermochromic layer includes a plurality of reversible thermochromic layers having different color changing temperatures provided at locations excluding a grip part 2 of the shaft cylinder, and a reversible thermochromic layer provided close to the grip part is changed in color at a temperature which is hardly affected by body temperatures compared with a reversible thermochromic layer provided far from the grip part. <P>COPYRIGHT: (C)2013,JPO&INPIT |
