JPS6480980A - Copy preventing method - Google Patents

Copy preventing method

Info

Publication number
JPS6480980A
JPS6480980A JP62237951A JP23795187A JPS6480980A JP S6480980 A JPS6480980 A JP S6480980A JP 62237951 A JP62237951 A JP 62237951A JP 23795187 A JP23795187 A JP 23795187A JP S6480980 A JPS6480980 A JP S6480980A
Authority
JP
Japan
Prior art keywords
line part
absorptivity
image formation
wavelength
formation body
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.)
Pending
Application number
JP62237951A
Other languages
Japanese (ja)
Inventor
Kiyoshi Toukou
Masato Takada
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.)
Teikoku Printing Inks Manufacturing Co Ltd
Original Assignee
Teikoku Printing Inks Manufacturing 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 Teikoku Printing Inks Manufacturing Co Ltd filed Critical Teikoku Printing Inks Manufacturing Co Ltd
Priority to JP62237951A priority Critical patent/JPS6480980A/en
Publication of JPS6480980A publication Critical patent/JPS6480980A/en
Pending legal-status Critical Current

Links

Landscapes

  • Credit Cards Or The Like (AREA)
  • Printing Methods (AREA)
  • Cleaning In Electrography (AREA)

Abstract

PURPOSE:To securely a copy from being taken without permission by obtaining an image formation body which has absorptivity of specific wavelength equal to or smaller than the absorptivity of wavelength of a non-line part. CONSTITUTION:The image formation body whose absorptivity of 400-600nm wavelength of a line part is equal to or smaller than the absorptivity of 400-600nm wavelength of the non-line part is formed. This image formation body is obtained by forming the line part in optional color on, for example, a base material (non-line part) having a specular surface, and metal foil such as aluminum, a plastic film where metal such as aluminum, copper, etc., are vapor-deposited, etc., are usable as the base material having the specular surface. An in-use electrophotographic copying machine uses light of 400-600nm wave length for exposure, so when this image formation body is copied electrophoto graphically, the line part and non-line part are copied in black and a copy whose line part can not be read is obtained. Consequently, a copy is prevented from being taken without permission.
JP62237951A 1987-09-22 1987-09-22 Copy preventing method Pending JPS6480980A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62237951A JPS6480980A (en) 1987-09-22 1987-09-22 Copy preventing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62237951A JPS6480980A (en) 1987-09-22 1987-09-22 Copy preventing method

Publications (1)

Publication Number Publication Date
JPS6480980A true JPS6480980A (en) 1989-03-27

Family

ID=17022883

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62237951A Pending JPS6480980A (en) 1987-09-22 1987-09-22 Copy preventing method

Country Status (1)

Country Link
JP (1) JPS6480980A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001088425A (en) * 1999-09-27 2001-04-03 Dainippon Printing Co Ltd Counterfeit discrimination medium
JP2008034661A (en) * 2006-07-28 2008-02-14 Sharp Corp Circuit board, manufacturing method thereof, and electronic apparatus using the same

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59125770A (en) * 1983-01-05 1984-07-20 Fuji Xerox Co Ltd Original prevented from copy
JPS60220784A (en) * 1984-04-17 1985-11-05 Toppan Printing Co Ltd Picture former

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59125770A (en) * 1983-01-05 1984-07-20 Fuji Xerox Co Ltd Original prevented from copy
JPS60220784A (en) * 1984-04-17 1985-11-05 Toppan Printing Co Ltd Picture former

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001088425A (en) * 1999-09-27 2001-04-03 Dainippon Printing Co Ltd Counterfeit discrimination medium
JP2008034661A (en) * 2006-07-28 2008-02-14 Sharp Corp Circuit board, manufacturing method thereof, and electronic apparatus using the same

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