Title:
TEMPERATURE HISTORY DISPLAY MATERIAL COMPOSITION
Document Type and Number:
Japanese Patent JP2008014884
Kind Code:
A
Abstract:
To provide a temperature history display material composition to be colored irreversibly at a desired temperature with a simple configuration.
The temperature history display material composition has developer particles and color coupler particles containing carriers carrying a color coupler. When the composition is exposed to a management temperature or higher, the developer reacts with the color coupler to cause a coloring reaction, and contact of the developer with the color coupler is maintained even if it is cooled again. The coloring reaction becomes irreversible, and the composition is colored irreversibly at the desired temperature.
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Inventors:
NAKASUMI HIROYUKI
YAMAUCHI KOSUKE
HYODO YUTAKA
YAGI SHIGEYUKI
YAMAUCHI KOSUKE
HYODO YUTAKA
YAGI SHIGEYUKI
Application Number:
JP2006188825A
Publication Date:
January 24, 2008
Filing Date:
July 10, 2006
Export Citation:
Assignee:
UNIV OSAKA PREFECTURE
NARD INSTITUTE LTD
NARD INSTITUTE LTD
International Classes:
G01K11/16; C09K3/00; G01K1/02
Domestic Patent References:
| JP2002257641A | 2002-09-11 | |||
| JP2004233344A | 2004-08-19 | |||
| JP2006009837A | 2006-01-12 | |||
| JP2001221704A | 2001-08-17 | |||
| JPS6213611B2 | 1987-03-27 |
Attorney, Agent or Firm:
Keiko Kato
Masaki Hiroyuki
Masaki Hiroyuki