JPS6442279A - Thermal recording material - Google Patents

Thermal recording material

Info

Publication number
JPS6442279A
JPS6442279A JP62200567A JP20056787A JPS6442279A JP S6442279 A JPS6442279 A JP S6442279A JP 62200567 A JP62200567 A JP 62200567A JP 20056787 A JP20056787 A JP 20056787A JP S6442279 A JPS6442279 A JP S6442279A
Authority
JP
Japan
Prior art keywords
color
formula
leuco dye
dye
recording material
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.)
Granted
Application number
JP62200567A
Other languages
Japanese (ja)
Other versions
JP2608730B2 (en
Inventor
Kunio Hayakawa
Hiromi Furuya
Miho Ohashi
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.)
Ricoh Co Ltd
Original Assignee
Ricoh Co 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP62200567A priority Critical patent/JP2608730B2/en
Publication of JPS6442279A publication Critical patent/JPS6442279A/en
Application granted granted Critical
Publication of JP2608730B2 publication Critical patent/JP2608730B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
    • B41M5/323—Organic colour formers, e.g. leuco dyes
    • B41M5/327—Organic colour formers, e.g. leuco dyes with a lactone or lactam ring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M5/00—Duplicating or marking methods; Sheet materials for use therein
    • B41M5/26—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used
    • B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
    • B41M5/333—Colour developing components therefor, e.g. acidic compounds
    • B41M5/3333—Non-macromolecular compounds

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)

Abstract

PURPOSE:To obtain a thermal recording material having strong absorption in a near infrared region at or above a specified wavelength, by using a speci fied leuco dye and a specified color developer. CONSTITUTION:A leuco dye of formula I, wherein each of R1 and R2 is hydrogen or an alkyl, and each of R3 and R4 is an alkyl, is used in a thermal recording material utilizing a color forming reaction with a leuco dye and a color devel oper for developing the dye into a color upon making contact with the dye. When the leuco dye of formula I is developed into color by a conventionally known color developer, the images formed are difficult to read in the wave length range of at least than 900nm through they can be satisfactorily read in the wavelength range of up to 800nm. However, when the leuco dye is com bined with a color developer of formula II, wherein X is a halogen, absorption intensity at wavelengths of at least 900nm is drastically enhanced, and the images to be formed can be read by an image reader using a general-purpose semiconductor laser. The compound of formula I may be, for example, 3-(N,N-diphenylaminophenyl)-3-{bis-1,1-(p-dimethylaminophenyl)-ethylen o-2}-6-dimethyla minophthalide, whereas the color developer of formula II may be, for example, chloranil or bromanil.
JP62200567A 1987-08-10 1987-08-10 Thermal recording material Expired - Lifetime JP2608730B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62200567A JP2608730B2 (en) 1987-08-10 1987-08-10 Thermal recording material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62200567A JP2608730B2 (en) 1987-08-10 1987-08-10 Thermal recording material

Publications (2)

Publication Number Publication Date
JPS6442279A true JPS6442279A (en) 1989-02-14
JP2608730B2 JP2608730B2 (en) 1997-05-14

Family

ID=16426470

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62200567A Expired - Lifetime JP2608730B2 (en) 1987-08-10 1987-08-10 Thermal recording material

Country Status (1)

Country Link
JP (1) JP2608730B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60115528A (en) * 1983-11-28 1985-06-22 Takeda Chem Ind Ltd Human interleukin-2 protein, its production and pharmacological composition containing the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60115528A (en) * 1983-11-28 1985-06-22 Takeda Chem Ind Ltd Human interleukin-2 protein, its production and pharmacological composition containing the same

Also Published As

Publication number Publication date
JP2608730B2 (en) 1997-05-14

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