Title:
HEAT-SENSITIVE RECORDING MEDIUM
Document Type and Number:
Japanese Patent JP3118978
Kind Code:
B2
Abstract:
PURPOSE: To provide absorption wavelength at a near infrared part and obtain a developed black-color image excellent in sharpness and storage capability by permitting a fatty acid ferric salt and a plurality of phenolic compounds having a hydroxyl group at their respectively specified positions to be contained in a heat-sensitive color forming layer formed on a base material.
CONSTITUTION: A heat-sensitive recording medium has a heat-sensitive color forming layer formed on the upper face of a base material. In this case, the heat-sensitive color forming layer contains a fatty acid ferric salt, a phenolic compound (A) having hydroxyl groups in at least 3- and 4-positions, and a phenolic compound (B) having hydroxyl groups in 2- and 4-positions only. The phenolic compound (A) is composed of a gallic acid ester, a 3,4-dihydroxybenzoic acid ester or a 3,4-dihydroxy-4-methyldiphenyl sulfone, or a mixture thereof. Further, the phenolic compound (B) is composed of a 2,4-dihyroxybenzophenone or a 2,4-dihydroxybenzoic acid ester, or a mixture thereof.
Inventors:
Katsumi Moronuki
Nobuyuki Iwasaki
Nobuyuki Iwasaki
Application Number:
JP24277792A
Publication Date:
December 18, 2000
Filing Date:
August 19, 1992
Export Citation:
Assignee:
Oji Paper Co.,Ltd.
International Classes:
B41M5/323; B41M5/30; B41M5/32; B41M5/333; B41M5/40; B41M5/46; (IPC1-7): B41M5/26; B41M5/30
Domestic Patent References:
| JP4164687A | ||||
| JP59136287A | ||||
| JP63214478A | ||||
| JP62105688A |
Attorney, Agent or Firm:
Kiyoko Arai