JPS64188A - Color-forming composition - Google Patents

Color-forming composition

Info

Publication number
JPS64188A
JPS64188A JP62298098A JP29809887A JPS64188A JP S64188 A JPS64188 A JP S64188A JP 62298098 A JP62298098 A JP 62298098A JP 29809887 A JP29809887 A JP 29809887A JP S64188 A JPS64188 A JP S64188A
Authority
JP
Japan
Prior art keywords
color
dye
forming
ketal
acetal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP62298098A
Other languages
Japanese (ja)
Other versions
JPH01188A (en
Inventor
Noritoshi Mise
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Takeda Pharmaceutical Co Ltd
Original Assignee
Takeda Chemical Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Takeda Chemical Industries Ltd filed Critical Takeda Chemical Industries Ltd
Priority to JP62-298098A priority Critical patent/JPH01188A/en
Priority claimed from JP62-298098A external-priority patent/JPH01188A/en
Publication of JPS64188A publication Critical patent/JPS64188A/en
Publication of JPH01188A publication Critical patent/JPH01188A/en
Pending legal-status Critical Current

Links

Landscapes

  • Heat Sensitive Colour Forming Recording (AREA)

Abstract

PURPOSE: To prepare a color-forming composition which has excellent shelf stability and good color stability and provides excellent coloration, by combining a color-forming dye with a color developer comprising a ketal or acetal of L-ascorbic or D-erysorbic acid.
CONSTITUTION: The title composition is prepared by combining a color-forming dye with a color developer comprising L-ascorbic acid 5,6-O-ketal or 5,6-O-acetal, or D-erysorbic acid 5,6-O-ketal or 5,6-O-acetal. An example of the color-forming dye is a dye generally called leuco dye. This color-forming composition can be used for a thermal recording medium such as heat-sensitive paper, or for a pressure-sensitive recording medium such as pressure-sensitive copying paper.
COPYRIGHT: (C)1989,JPO&Japio
JP62-298098A 1986-11-27 1987-11-26 coloring composition Pending JPH01188A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62-298098A JPH01188A (en) 1986-11-27 1987-11-26 coloring composition

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP28395286 1986-11-27
JP61-283952 1986-11-27
JP62-29999 1987-02-12
JP62-298098A JPH01188A (en) 1986-11-27 1987-11-26 coloring composition

Publications (2)

Publication Number Publication Date
JPS64188A true JPS64188A (en) 1989-01-05
JPH01188A JPH01188A (en) 1989-01-05

Family

ID=

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04216094A (en) * 1990-12-14 1992-08-06 Ricoh Co Ltd Electron accepting color developer and thermal recording method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04216094A (en) * 1990-12-14 1992-08-06 Ricoh Co Ltd Electron accepting color developer and thermal recording method

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