AU2304584A - Invisible ink structure - Google Patents

Invisible ink structure

Info

Publication number
AU2304584A
AU2304584A AU23045/84A AU2304584A AU2304584A AU 2304584 A AU2304584 A AU 2304584A AU 23045/84 A AU23045/84 A AU 23045/84A AU 2304584 A AU2304584 A AU 2304584A AU 2304584 A AU2304584 A AU 2304584A
Authority
AU
Australia
Prior art keywords
invisible ink
ink structure
invisible
ink
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
AU23045/84A
Other versions
AU560131B2 (en
Inventor
Roderick Peter John Tomlinson
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.)
FIELD NORMAN JOHN
Lockley Services Pty Ltd
Original Assignee
Lockley Services Pty 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 Lockley Services Pty Ltd filed Critical Lockley Services Pty Ltd
Priority to AU23045/84A priority Critical patent/AU560131B2/en
Publication of AU2304584A publication Critical patent/AU2304584A/en
Application granted granted Critical
Publication of AU560131B2 publication Critical patent/AU560131B2/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/50—Sympathetic, colour changing or similar inks
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Organic Chemistry (AREA)
AU23045/84A 1977-12-02 1984-01-03 Invisible ink structure Ceased AU560131B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU23045/84A AU560131B2 (en) 1977-12-02 1984-01-03 Invisible ink structure

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
AUPD2656 1977-12-02
AUPD2655 1977-12-02
AU23045/84A AU560131B2 (en) 1977-12-02 1984-01-03 Invisible ink structure

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
AU42109/78A Division AU539923B2 (en) 1977-12-02 1978-11-30 A system of developing and erasing invisible inks

Publications (2)

Publication Number Publication Date
AU2304584A true AU2304584A (en) 1984-05-03
AU560131B2 AU560131B2 (en) 1987-04-02

Family

ID=3712157

Family Applications (1)

Application Number Title Priority Date Filing Date
AU23045/84A Ceased AU560131B2 (en) 1977-12-02 1984-01-03 Invisible ink structure

Country Status (1)

Country Link
AU (1) AU560131B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5475468A (en) * 1992-11-20 1995-12-12 Toppan Printing Co., Ltd. Method and copying machine for preventing illegal copying

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02255375A (en) * 1989-03-29 1990-10-16 Arakawa Chem Ind Co Ltd Coupler for pressure-sensitive recording material, aqueous dispersion of coupler and preparation thereof
DE10020873A1 (en) * 2000-04-28 2001-11-08 Mitsubishi Hitec Paper Flensbu Temporary authentification mark for security documents uses a substituted phthalide reacting on contact with an alkaline solution, together with a volatile solvent

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5475468A (en) * 1992-11-20 1995-12-12 Toppan Printing Co., Ltd. Method and copying machine for preventing illegal copying
US5740514A (en) * 1992-11-20 1998-04-14 Toppan Printing Co., Ltd. Information carrying sheet and illegal copying preventive image pattern

Also Published As

Publication number Publication date
AU560131B2 (en) 1987-04-02

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