JPS5596973A - Copying preventing method - Google Patents
Copying preventing methodInfo
- Publication number
- JPS5596973A JPS5596973A JP371879A JP371879A JPS5596973A JP S5596973 A JPS5596973 A JP S5596973A JP 371879 A JP371879 A JP 371879A JP 371879 A JP371879 A JP 371879A JP S5596973 A JPS5596973 A JP S5596973A
- Authority
- JP
- Japan
- Prior art keywords
- reflecting film
- thin film
- copying
- synthetic resins
- confidential documents
- 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 the copying of confidential documents and the like and ease the administration of confidential documents by forming a metal thin film on one surface of a thin film of synthetic resins to form the reflecting film of a required reflectance and attaching this on the stated surface of the confidential documents and the like to be prevented from being copied. CONSTITUTION:A reflecting film 3 is made by forming a metal thin film 3' of Al or the like on one surface of a thin film 4 of transparent synthetic resins by such a method as plating, vapor deposition or coating as thinly as possible to a coarse density. This reflecting film 3 is directly bonded onto the stated surface 2 of the paper 1 for statement to be prevented from being copied or the reflecting film 3 is beforehand bonded to the inner or outer side of a cover 5 of transparent synthetic resins and is then attached onto the written surface 2. As a result of this, it reflects most of rays of the lighting necessary for copying and the copying finish becomes blurred to the extent of making the contents of the stated surface 2 illegible, and yet, in the ordinary use, the contents are legible by the slight transmitted light remained in the reflecting film 3.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP371879A JPS5596973A (en) | 1979-01-17 | 1979-01-17 | Copying preventing method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP371879A JPS5596973A (en) | 1979-01-17 | 1979-01-17 | Copying preventing method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5596973A true JPS5596973A (en) | 1980-07-23 |
Family
ID=11565083
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP371879A Pending JPS5596973A (en) | 1979-01-17 | 1979-01-17 | Copying preventing method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5596973A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS59125770A (en) * | 1983-01-05 | 1984-07-20 | Fuji Xerox Co Ltd | Original prevented from copy |
JPS6023850U (en) * | 1983-07-25 | 1985-02-18 | キソ化成産業株式会社 | blackout film |
JPS6123187A (en) * | 1984-07-11 | 1986-01-31 | Kiso Kasei Sangyo Kk | Copy preventive film |
US4586811A (en) * | 1982-04-23 | 1986-05-06 | Ricoh Company, Ltd. | Confidential document reproduction prevention method |
NL9301507A (en) * | 1993-09-01 | 1995-04-03 | Enschede & Zonen Grafisch | Carrier for a graphic image with copy protection. |
JPH07172035A (en) * | 1994-06-24 | 1995-07-11 | Dainippon Printing Co Ltd | Copy preventive medium |
-
1979
- 1979-01-17 JP JP371879A patent/JPS5596973A/en active Pending
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4586811A (en) * | 1982-04-23 | 1986-05-06 | Ricoh Company, Ltd. | Confidential document reproduction prevention method |
JPS59125770A (en) * | 1983-01-05 | 1984-07-20 | Fuji Xerox Co Ltd | Original prevented from copy |
JPH05711B2 (en) * | 1983-01-05 | 1993-01-06 | Fuji Xerox Co Ltd | |
JPS6023850U (en) * | 1983-07-25 | 1985-02-18 | キソ化成産業株式会社 | blackout film |
JPS6123187A (en) * | 1984-07-11 | 1986-01-31 | Kiso Kasei Sangyo Kk | Copy preventive film |
NL9301507A (en) * | 1993-09-01 | 1995-04-03 | Enschede & Zonen Grafisch | Carrier for a graphic image with copy protection. |
EP0646472A1 (en) * | 1993-09-01 | 1995-04-05 | Joh. Enschedé en Zonen Grafische Inrichting B.V. | Support for a graphical image having a copying security |
JPH07172035A (en) * | 1994-06-24 | 1995-07-11 | Dainippon Printing Co Ltd | Copy preventive medium |
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