JPS5536871A - Formation method for secreting image - Google Patents

Formation method for secreting image

Info

Publication number
JPS5536871A
JPS5536871A JP11048578A JP11048578A JPS5536871A JP S5536871 A JPS5536871 A JP S5536871A JP 11048578 A JP11048578 A JP 11048578A JP 11048578 A JP11048578 A JP 11048578A JP S5536871 A JPS5536871 A JP S5536871A
Authority
JP
Japan
Prior art keywords
spectral characteristics
image
efficiency
region
display
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
JP11048578A
Other languages
Japanese (ja)
Inventor
Satoshi Takeuchi
Akira Izawa
Yoshiaki Hida
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.)
Dai Nippon Printing Co Ltd
Original Assignee
Dai Nippon Printing 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 Dai Nippon Printing Co Ltd filed Critical Dai Nippon Printing Co Ltd
Priority to JP11048578A priority Critical patent/JPS5536871A/en
Publication of JPS5536871A publication Critical patent/JPS5536871A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00—Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/04—Preventing copies being made of an original
    • G03G21/043—Preventing copies being made of an original by using an original which is not reproducible or only reproducible with a different appearence, e.g. originals with a photochromic layer or a colour background

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)

Abstract

PURPOSE:To form a secreted image by forming an image using 2 kinds of color materials having specified spectral characteristics neighboring each other on a base sheet. CONSTITUTION:A display, for example, DNP is formed on base sheet 1 using color material (ink C) 2B and color material (ink D) 2A having difference in transmission (reflection) spectral characteristics in the region low in relative luminous efficiency in the visible wavelengths and the similar spectral characteristics in the region higher in the above efficiency. The above display renders recognition of the figure impossible because of similar spectral characteristics in the higher efficiency region, but the formed display can be clearly recognized by observing this using a filter transmitting only the wavelength region low in the efficiency.
JP11048578A 1978-09-08 1978-09-08 Formation method for secreting image Pending JPS5536871A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11048578A JPS5536871A (en) 1978-09-08 1978-09-08 Formation method for secreting image

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11048578A JPS5536871A (en) 1978-09-08 1978-09-08 Formation method for secreting image

Publications (1)

Publication Number Publication Date
JPS5536871A true JPS5536871A (en) 1980-03-14

Family

ID=14536918

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11048578A Pending JPS5536871A (en) 1978-09-08 1978-09-08 Formation method for secreting image

Country Status (1)

Country Link
JP (1) JPS5536871A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58225290A (en) * 1982-03-22 1983-12-27 ドナルド・デクル・バ−ソロミユ− Connector assembly
JP2000078387A (en) * 1998-08-28 2000-03-14 Fuji Photo Film Co Ltd Printing method and device, pattern read method and device and recording medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58225290A (en) * 1982-03-22 1983-12-27 ドナルド・デクル・バ−ソロミユ− Connector assembly
JP2000078387A (en) * 1998-08-28 2000-03-14 Fuji Photo Film Co Ltd Printing method and device, pattern read method and device and recording medium

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