JPS5536872A - Copy prevention method - Google Patents
Copy prevention methodInfo
- Publication number
- JPS5536872A JPS5536872A JP11048678A JP11048678A JPS5536872A JP S5536872 A JPS5536872 A JP S5536872A JP 11048678 A JP11048678 A JP 11048678A JP 11048678 A JP11048678 A JP 11048678A JP S5536872 A JPS5536872 A JP S5536872A
- Authority
- JP
- Japan
- Prior art keywords
- wavelength region
- color
- sensible
- color copying
- spectral characteristics
- 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
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 prevent forgery of a check, a merchandise bond, or the like with a color copying machine, by using adjacently for printing 2 colors different from each other in spectral characteristics in the wavelength region insensible by a photosensitive material for color copying but similar to each other in spectral characteristics in the other wavelength region. CONSTITUTION:The wavelength region sensible by a photosensitive material for color copying is generally discontinuous and the material is not sensitive to a wavelength region near 560-600nm. The image formed by using 2 kinds of color materials C and D having difference in reflection spectral characteristics in the visible wavelength region beyond the wavelength region sensible by the photosensitive material for color copying, but similar characteristics in the visible wavelength region sensible by the material can be recognized by human eyes, but the color copied image becomes similar colors and unrecognizable. Therefore, adjacent use of the 2 color materials in printing renders the image, color-copied from the recognizable original, unrecognizable, permitting forgery of a check, a merchandise bond, etc. to be prevented.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11048678A JPS5536872A (en) | 1978-09-08 | 1978-09-08 | Copy prevention method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11048678A JPS5536872A (en) | 1978-09-08 | 1978-09-08 | Copy prevention method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5536872A true JPS5536872A (en) | 1980-03-14 |
Family
ID=14536947
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11048678A Pending JPS5536872A (en) | 1978-09-08 | 1978-09-08 | Copy prevention method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5536872A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5640581A (en) * | 1979-09-12 | 1981-04-16 | Kyodo Printing Co Ltd | Forgery protection printed matter |
FR2503890A1 (en) * | 1979-09-17 | 1982-10-15 | Auken John Van | Multi-colour anti-copying system for e.g. xerographic copier - uses pre-selected background and image colours for colouring original document to prevent copying |
US6255567B1 (en) | 1999-01-19 | 2001-07-03 | Yamaha Corporation | Stringed musical instrument with composite body partially formed of metal or synthetic resin |
US6664453B2 (en) | 2001-03-05 | 2003-12-16 | Yamaha Corporation | Guitar neck attachment structure |
US6888054B2 (en) | 2002-05-16 | 2005-05-03 | Yamaha Corporation | Body structure of guitar |
-
1978
- 1978-09-08 JP JP11048678A patent/JPS5536872A/en active Pending
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5640581A (en) * | 1979-09-12 | 1981-04-16 | Kyodo Printing Co Ltd | Forgery protection printed matter |
JPS6340677B2 (en) * | 1979-09-12 | 1988-08-12 | Kyodo Printing Co Ltd | |
FR2503890A1 (en) * | 1979-09-17 | 1982-10-15 | Auken John Van | Multi-colour anti-copying system for e.g. xerographic copier - uses pre-selected background and image colours for colouring original document to prevent copying |
US6255567B1 (en) | 1999-01-19 | 2001-07-03 | Yamaha Corporation | Stringed musical instrument with composite body partially formed of metal or synthetic resin |
US6664453B2 (en) | 2001-03-05 | 2003-12-16 | Yamaha Corporation | Guitar neck attachment structure |
US6888054B2 (en) | 2002-05-16 | 2005-05-03 | Yamaha Corporation | Body structure of guitar |
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