GB947633A - Improved copy sheets - Google Patents

Improved copy sheets

Info

Publication number
GB947633A
GB947633A GB473560A GB473560A GB947633A GB 947633 A GB947633 A GB 947633A GB 473560 A GB473560 A GB 473560A GB 473560 A GB473560 A GB 473560A GB 947633 A GB947633 A GB 947633A
Authority
GB
United Kingdom
Prior art keywords
chloride
acid
water soluble
heat
magnesium
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
GB473560A
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.)
3M Co
Original Assignee
Minnesota Mining and Manufacturing Co
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 Minnesota Mining and Manufacturing Co filed Critical Minnesota Mining and Manufacturing Co
Publication of GB947633A publication Critical patent/GB947633A/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
    • B41M5/30—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers
    • B41M5/32—Thermography ; Marking by high energetic means, e.g. laser otherwise than by burning, and characterised by the material used using chemical colour formers one component being a heavy metal compound, e.g. lead or iron
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S101/00—Printing
    • Y10S101/29—Printing involving a color-forming phenomenon
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/913—Material designed to be responsive to temperature, light, moisture
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/165—Thermal imaging composition
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249994—Composite having a component wherein a constituent is liquid or is contained within preformed walls [e.g., impregnant-filled, previously void containing component, etc.]

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)
  • Polysaccharides And Polysaccharide Derivatives (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)

Abstract

947,633. Heat-sensitive copying sheets. MINNESOTA MINING & MANUFACTURING CO. Feb. 10, 1960 [Feb. 13, 1959], No. 4735/60. Heading G2C. A heat-sensitive copying sheet suitable for thermographic production of graphic original has a heat-sensitive layer comprising a water soluble compound of a cation and a difficulty reducible heteropoly acid complex having a central atom with an enclosing structure of atoms selected from molybdenum, tungsten or vanadium or mixtures thereof, a water soluble hydrolyzable salt of a strong acid anion and a metal cation not readily oxidisable in aqueous solution, and a water soluble reducing agent having a mild reducing action in acid solution, the heat-sensitive layer being capable of permanently converting to a visibly distinct form upon being momentarily pressed against a metal test bar at a temperature in the range 60 to 150‹C. Said heteropoly acid complex, preferably a phosphomolybdate, may be produced in aqueous solution for example by the interaction of a molybdate - e.g. ammonium molybdate - and a phosphate - e.g. disodium acid phosphate. Analogous reactions occur between molybdates and silicates or arsenates and between tungstates or vanadates and phosphates. Aluminium, chromium, iron, cobalt, manganese, antimony, germanium, boron, copper, tellurium, titanium, selenium, zirconium and thorium also form a heteropoly acid complex anion with molybdenum, tungsten or vanadium. Ascorbic acid and thiourea are the preferred reducing agents but itaconic acid, malic acid, para-amino-phenolsulphate, tartaric acid and sodium thiosulphate may also be used alone or in combination. Suitable hydrolyzable salts include magnesium chloride, calcium chloride, aluminium chloride, cadmium chloride, lithium chloride, magnesium bromide, magnesium nitrate, magnesium sulphate, manganese chloride, manganese sulphate, nickel chloride, strontium choride, zinc chloride zinc sulphate and cobalt chloride. A water soluble salt of a weak acid having an ionisation constant of less than 10<SP>-3</SP> may be added to stabilize the compositions. Preferred examples include ammonium or alkali metal citrates, tartrates, acetates, formates, lactates, benzoates, phthalates, malates, carbonates and bicarbonates. Examples are given in which the reactants are dissolved in an aqueous solution for coating on to or impregnating into a suitable web material including aluminium foil and also (Example 8) in which they are dissolved in a film forming material which may be ethyl cellulose in acetane or water soluble cellulose or polyvinyl derivatives for producing self supporting sheets. The web material may be coated with a thin opacifying layer (Example 2) to increase contrast and may also have a thin transparent protective surface coating.
GB473560A 1959-02-13 1960-02-10 Improved copy sheets Expired GB947633A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US79298559 US2980551A (en) 1959-02-13 1959-02-13 Method of making a heat-sensitive copysheet and resultant article

Publications (1)

Publication Number Publication Date
GB947633A true GB947633A (en) 1964-01-22

Family

ID=25158723

Family Applications (1)

Application Number Title Priority Date Filing Date
GB473560A Expired GB947633A (en) 1959-02-13 1960-02-10 Improved copy sheets

Country Status (3)

Country Link
US (1) US2980551A (en)
DE (1) DE1240097B (en)
GB (1) GB947633A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2164462A (en) * 1984-08-09 1986-03-19 Japan Res Dev Corp Optical recording material, process for preparing the same and optical recording method
CN103182875A (en) * 2011-12-27 2013-07-03 理想科学工业株式会社 Body paper used for thermosensitive porous printing

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL259126A (en) * 1960-11-21
US3166433A (en) * 1962-08-01 1965-01-19 Nashua Corp Heat sensitive copy and recording sheet
US3435759A (en) * 1966-03-02 1969-04-01 Dymo Industries Inc Duplicating method involving color formation
US3793075A (en) * 1971-12-20 1974-02-19 Moore Business Forms Inc Dialkyl tartrate-heteropolyacid developing system for dye precursor compounds
JPS5323630A (en) * 1976-08-17 1978-03-04 Dainippon Printing Co Ltd Method of forming picture
JPS61173987A (en) * 1985-01-30 1986-08-05 Sugai Kagaku Kogyo Kk Thermal transfer recording material

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA552750A (en) * 1947-05-10 1958-02-04 Minnesota Mining And Manufacturing Company Heat-sensitive copying-paper
US2663655A (en) * 1952-05-15 1953-12-22 Minnesota Mining & Mfg Heat-sensitive copying paper

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2164462A (en) * 1984-08-09 1986-03-19 Japan Res Dev Corp Optical recording material, process for preparing the same and optical recording method
CN103182875A (en) * 2011-12-27 2013-07-03 理想科学工业株式会社 Body paper used for thermosensitive porous printing

Also Published As

Publication number Publication date
DE1240097B (en) 1967-05-11
US2980551A (en) 1961-04-18

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