CA2149947A1 - Heat sensitive system and use thereof - Google Patents

Heat sensitive system and use thereof

Info

Publication number
CA2149947A1
CA2149947A1 CA 2149947 CA2149947A CA2149947A1 CA 2149947 A1 CA2149947 A1 CA 2149947A1 CA 2149947 CA2149947 CA 2149947 CA 2149947 A CA2149947 A CA 2149947A CA 2149947 A1 CA2149947 A1 CA 2149947A1
Authority
CA
Canada
Prior art keywords
chromogenic
heat sensitive
chromogenic composition
sensitive system
pressure sensitive
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
CA 2149947
Other languages
French (fr)
Other versions
CA2149947C (en
Inventor
John C. H. Chang
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.)
Wallace Computer Services Inc
Original Assignee
Wallace Computer Services Inc
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 Wallace Computer Services Inc filed Critical Wallace Computer Services Inc
Priority to CA 2149947 priority Critical patent/CA2149947C/en
Publication of CA2149947A1 publication Critical patent/CA2149947A1/en
Application granted granted Critical
Publication of CA2149947C publication Critical patent/CA2149947C/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • B41M5/337—Additives; Binders
    • B41M5/3375—Non-macromolecular compounds
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • B41M3/142—Security printing using chemical colour-formers or chemical reactions, e.g. leuco-dye/acid, photochromes
    • 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

Landscapes

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

Abstract

A heat sensitive system comprises a document having a localized, non-pressure sensitive, coating of chromogenic composition activated at moderate temperatures. Quickly striking the chromogenic composition with a fingernail or blunt object produces a colored image by frictional heat. The chromogenic composition contains a chromogenic compound and a color developer which are non-pressure sensitive and non-reactive at room temperature. The chromogenic composition can be an intimate mixture of the chromogenic compound and the developer or alternatively separate layers of each of the components.
CA 2149947 1995-05-23 1995-05-23 Heat sensitive system and use thereof Expired - Fee Related CA2149947C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA 2149947 CA2149947C (en) 1995-05-23 1995-05-23 Heat sensitive system and use thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA 2149947 CA2149947C (en) 1995-05-23 1995-05-23 Heat sensitive system and use thereof

Publications (2)

Publication Number Publication Date
CA2149947A1 true CA2149947A1 (en) 1996-11-24
CA2149947C CA2149947C (en) 2002-04-16

Family

ID=4155888

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2149947 Expired - Fee Related CA2149947C (en) 1995-05-23 1995-05-23 Heat sensitive system and use thereof

Country Status (1)

Country Link
CA (1) CA2149947C (en)

Also Published As

Publication number Publication date
CA2149947C (en) 2002-04-16

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed