Title:
REVERSIBLE THERMAL DISCOLORING MATERIAL
Document Type and Number:
Japanese Patent JPH04267190
Kind Code:
A
Abstract:
PURPOSE: To improve the properties of a material which becomes discolored reversibly in accordance with temperature change.
CONSTITUTION: A reversibly thermal discoloring material contains an electron- donative, color developing organic compound, an electron-receptive chemical compound and a discoloring temperature-adjustable compound, and further R1-PO(OH) or R2-CH(OH)COOH (R1 is 8 to 30C alkyl group; R2 is a 6 to 28C alkyl group). This reversibly thermal discoloring material has improved thermal response, developed color density and discharging properties.
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Inventors:
KAWAMURA EIICHI
GOTO HIROSHI
GOTO HIROSHI
Application Number:
JP10325491A
Publication Date:
September 22, 1992
Filing Date:
February 21, 1991
Export Citation:
Assignee:
RICOH KK
International Classes:
B41M5/337; B41M5/26; B41M5/30; B41M5/333; C09K9/02; (IPC1-7): B41M5/26; B41M5/30; C09K9/02
Attorney, Agent or Firm:
Hidetake Komatsu (2 outside)