GB1245927A - Improvements relating to a thermographic method of recording information - Google Patents

Improvements relating to a thermographic method of recording information

Info

Publication number
GB1245927A
GB1245927A GB4479567A GB4479567A GB1245927A GB 1245927 A GB1245927 A GB 1245927A GB 4479567 A GB4479567 A GB 4479567A GB 4479567 A GB4479567 A GB 4479567A GB 1245927 A GB1245927 A GB 1245927A
Authority
GB
United Kingdom
Prior art keywords
water
heat
substance
colour
soluble
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.)
Expired
Application number
GB4479567A
Inventor
Marcel Nicolas Vrancken
Daniel Alois Claeys
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.)
Agfa Gevaert NV
Agfa Gevaert AG
Original Assignee
Agfa Gevaert NV
Agfa Gevaert AG
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 Agfa Gevaert NV, Agfa Gevaert AG filed Critical Agfa Gevaert NV
Priority to GB4479567A priority Critical patent/GB1245927A/en
Priority to FR1583139D priority patent/FR1583139A/fr
Priority to DE19681800383 priority patent/DE1800383A1/en
Priority to BE721706D priority patent/BE721706A/xx
Publication of GB1245927A publication Critical patent/GB1245927A/en
Expired 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
    • B41M5/36—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using a polymeric layer, which may be particulate and which is deformed or structurally changed with modification of its' properties, e.g. of its' optical hydrophobic-hydrophilic, solubility or permeability properties
    • B41M5/366—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using a polymeric layer, which may be particulate and which is deformed or structurally changed with modification of its' properties, e.g. of its' optical hydrophobic-hydrophilic, solubility or permeability properties using materials comprising a polymeric matrix containing a polymeric particulate material, e.g. hydrophobic heat coalescing particles

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Heat Sensitive Colour Forming Recording (AREA)

Abstract

1,245,927. Thermographic materials and processes. AGFA GEVAERT. Sept.10, 1968 [Oct.2, 1967], No.44795/67. Heading G2C. A heat-sensitive material comprising a support coated with a water-permeable layer of hydrophobic thermoplastic particles dispersed in a hydrophilic binder, (a) a substance which absorbs visible light and/or infrared radiation to yield sufficient heat to render the layer less water-permeable, this substance being water-soluble or capable of being bleached by using an aqueous bleach and (b) a non-water-soluble and/or non-bleachable coloured substance or colour former which can produce a coloured compound on heating or by reaction with a colour reactant. The invention also relates to a thermographic process in which the heat sensitive material above but without substance (b) is imagewise exposed so that the heated areas are rendered less water-permeable but are still permeable and developed with an aqueous liquid or bleach, to remove substance (a) from both the heated and non-heated areas either simultaneously or in successive steps. Preferred substances (a) are silver and water-soluble dye salts. Colour proofs may be produced by coating a support with the heat-sensitive layer above containing carbon instead of substances (a) and (b), imagewise exposing to the black separation negative and developing to remove the unheated areas to leave a black image. This image is coated with a heat-sensitive layer containing a water-insoluble cyan pigment and two water-soluble dyes absorbing visible light. The material is imagewise exposed to the cyan separation negative developed with water to remove the unheated areas and also to remove the water-soluble dyes from the heated areas. This last process is repeated using layers containing magenta and yellow water-insoluble pigments to build up a four-colour proof. Alternatively, silver may replace the water-soluble dyes and the silver is finally removed from the three top layers of the colour proof by a bleach bath. The preferred heat-sensitive layers are those disclosed in Specification 1,139,891 and 1,160,221 and the exposure techniques disclosed in those Specifications are preferred in the present process.
GB4479567A 1967-10-02 1967-10-02 Improvements relating to a thermographic method of recording information Expired GB1245927A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB4479567A GB1245927A (en) 1967-10-02 1967-10-02 Improvements relating to a thermographic method of recording information
FR1583139D FR1583139A (en) 1967-10-02 1968-09-30
DE19681800383 DE1800383A1 (en) 1967-10-02 1968-10-01 Procedure for registering and reproducing information
BE721706D BE721706A (en) 1967-10-02 1968-10-02

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4479567A GB1245927A (en) 1967-10-02 1967-10-02 Improvements relating to a thermographic method of recording information

Publications (1)

Publication Number Publication Date
GB1245927A true GB1245927A (en) 1971-09-15

Family

ID=10434783

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4479567A Expired GB1245927A (en) 1967-10-02 1967-10-02 Improvements relating to a thermographic method of recording information

Country Status (4)

Country Link
BE (1) BE721706A (en)
DE (1) DE1800383A1 (en)
FR (1) FR1583139A (en)
GB (1) GB1245927A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0573091B1 (en) * 1992-06-05 1996-03-20 Agfa-Gevaert N.V. A heat mode recording material and method for producing driographic printing plates
US5665524A (en) * 1995-06-05 1997-09-09 Toray Industries, Inc. Method for producing a printing plate and method if its use

Also Published As

Publication number Publication date
DE1800383A1 (en) 1969-05-22
FR1583139A (en) 1969-10-17
BE721706A (en) 1969-04-02

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