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JPS58118682A - Object which cannot be copied - Google Patents

Object which cannot be copied

Info

Publication number
JPS58118682A
JPS58118682A JP139182A JP139182A JPS58118682A JP S58118682 A JPS58118682 A JP S58118682A JP 139182 A JP139182 A JP 139182A JP 139182 A JP139182 A JP 139182A JP S58118682 A JPS58118682 A JP S58118682A
Authority
JP
Japan
Prior art keywords
copying
characters
color
black
contrast
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
JP139182A
Other languages
Japanese (ja)
Inventor
Yoshiro Nakamatsu
義郎 中松
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP139182A priority Critical patent/JPS58118682A/en
Publication of JPS58118682A publication Critical patent/JPS58118682A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03GELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G21/00Arrangements not provided for by groups G03G13/00 - G03G19/00, e.g. cleaning, elimination of residual charge
    • G03G21/04Preventing copies being made of an original
    • G03G21/043Preventing 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)
  • Combination Of More Than One Step In Electrophotography (AREA)
  • Holders For Sensitive Materials And Originals (AREA)

Abstract

PURPOSE:To prevent leakage of secret of confidential documents through copying, by making objects in such a way that the color contrast between the ground of paper and characters and graphs written on the paper can be discriminated by naked eyes but hardly discriminated by lights for copying. CONSTITUTION:An object 9 is a sheet of vermilion color 8, on which characters 2, graphs, etc., are printed in black, and the black characters, etc., can be read by naked eyes against the vermilion color of the ground. When the object 9 is put on a PPC copying machine and a copying light 4 for forming electrostatic image is irradiated upon the object 9, the contrast between the ground color and the color of characters, etc., is very inferior and the characters 2 cannot be read. Therefore, the copy 10 of the object 9 has a black ground 11 for the whole surface by the toner. Thus the object 9 cannot be copied. In this way leakage of secrets of confidential documents through copying can be prevented.

Description

【発明の詳細な説明】 本発明は、内容がコピィされて漏洩し、盗用されてはな
らないような機密書類等の複写防止被写体に関するもの
である。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to copy-protected objects such as confidential documents whose contents must not be copied, leaked, or misappropriated.

従来公知の複写においては、第1図、第2図に示すごと
く手描き、印刷、複写等により白地の紙(1)等の上に
黒色の文字(2)図形等をあらわした被写体(3)をP
PC又はCPC静電式被写機、ゾアゾ式被写機、写真機
等により、複写用光(4)を用い複写して例えば白地の
紙(5)等に、黒色の文字(6)図形等の第3図のごと
くコントラスト(C1)がある被写体(7)を得ていた
In conventionally known copying, as shown in Figs. 1 and 2, a subject (3) representing black letters (2), figures, etc. is drawn on a white paper (1) by hand-drawing, printing, copying, etc. P
Using a PC or CPC electrostatic copying machine, Zoazo copying machine, photographic machine, etc., copy using a copying light (4) to copy black letters (6), figures, etc. onto white paper (5), etc. As shown in Figure 3, an object (7) with contrast (C1) was obtained.

本発明は、地色と文字、図形等のカラーコントラストが
肉眼では識別出来、複写用光線ではコントラストが極め
て悪いようにしたことを特徴とする複写できぬ被写体で
あり、複写しても文字、図形等が判読できぬ被写体であ
る。
The present invention is a subject that cannot be copied, and is characterized in that the color contrast between the background color and characters, figures, etc. is distinguishable with the naked eye, and the contrast is extremely poor with copying light. etc. are illegible subjects.

第4図は本発明実施例を示すもので、本発明は朱色地(
8)の紙に黒色の文字(2)、図形等を印刷したもの(
9)であって、その黒色文字等は朱の地色に対し肉眼で
容易に読むことができる。
Figure 4 shows an embodiment of the present invention.
8) Paper with black letters (2), figures, etc. printed on it (
9), and the black characters etc. can be easily read with the naked eye against the vermillion background color.

これをPPC複写機により静電像形成用複写用光線(4
)を当てると第5図のように両者のコントラスト(C2
)がきわめて悪く、文字(2)が判読できない。従って
複写されたもの(10)は、全面にわたり黒色のトナー
による黒地(11)であり、複写出来ない事が本発明者
の繰返し実験により確認された。
This is then used with a PPC copying machine to form a copying light beam (4
), the contrast between the two (C2
) is extremely poor and character (2) is illegible. Therefore, it has been confirmed through repeated experiments by the present inventor that the copy (10) has a black background (11) made of black toner over the entire surface and cannot be copied.

第6図も本発明実施例を示すもので、白地(12)の上
にライトブルーの水性インクで文字(13)を書いた紙
(14)を被写体とするもので、その文字は地色を色相
、明度のカラーコントラストにより肉眼で視認できるが
、これをPPC複写機により静電像形成用複写用光線を
当て得たところの複写体の紙(15)は全面が白地のま
まで文字を全く認めることができない事が本発明者の実
験により確認された。すなわち被写体の白地も文字のラ
イトブルーも被写体において第7図のように両者のコン
トラスト差(C3)がなく文字(13)が判読できなか
った。
Figure 6 also shows an embodiment of the present invention, in which the subject is a paper (14) on which letters (13) are written with light blue water-based ink on a white background (12), and the letters are colored in the background color. This can be seen with the naked eye due to the color contrast of hue and brightness, but when the copying light beam for electrostatic image formation was applied using a PPC copying machine, the copy paper (15) was completely white with no letters. The inventor's experiments have confirmed that this cannot be accepted. That is, as shown in FIG. 7, there was no contrast difference (C3) between the white background of the subject and the light blue text, and the text (13) could not be read.

本発明によれば、複写機をなんら改造、変更することな
く被写体の地色と文字等の組合わせにより、第三者に予
知されることなく複写を防止することができ、文書の機
密漏洩防止等に卓効を得ることができるものである。
According to the present invention, it is possible to prevent copying without being predicted by a third party by combining the background color of the subject and characters without making any modifications or changes to the copying machine, thereby preventing leakage of confidential documents. It is something that can be extremely effective.

本発明は上記例の朱色のシートそのものを複写用紙とし
たりこの目的のため黒文字印刷しようとする前の朱色ソ
ートそのものやこれに静電複写して黒い文字等が入った
ものや、黒地に朱色文字を入れたもの、ライトブルーの
シートそのものを複写不能用に白色文字等記入するため
のライトブルー紙そのものや、複写を防ぐため白色地に
ライトブルー文字等入れたものなどすべて本発明に含ま
れ、又上記実施例のほか、複写により得た被写体の地色
とその上の文字図形等が、複写機の複写用光と、それに
よる感光発像の特性等によりコントラストが認められな
くなるようなカラーコントラストの被写体、および被複
写体の全面あるいは一部分をコピィできぬようにしたも
の等はすべて本発明に含まれるものである。
The present invention is applicable to the above-mentioned vermilion sheet itself as copy paper, to the vermilion sorting itself before black characters are printed for this purpose, to electrostatically copied sheets with black characters, etc., and to the vermilion sheets on black background. , light blue paper itself on which white characters are written to prevent copying, light blue sheets with light blue characters written on a white background to prevent copying, etc., are all included in the present invention. In addition to the above-mentioned embodiments, the color contrast between the background color of the object obtained by copying and the characters and figures on it is such that the contrast cannot be recognized due to the copying light of the copying machine and the characteristics of photosensitive imaging caused by it. The present invention includes all objects in which the whole or part of the object cannot be copied.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は従来公知の複写を示す側面図、第2図は第1図
の平面図、 第3図は従来公知の複写体のコントラスト図、第4図は
本発明第1実施例の平面図、 第5図は本発明第1実施例のコントラスト図、第6図は
本発明第2実施例の平面図、 第7図は本発明第2実施例のコントラスト図、8,12
・・・地色 2,13・・・文字、図形等 4・・・複写用光源 出願人 中松義郎
FIG. 1 is a side view showing a conventionally known copy, FIG. 2 is a plan view of FIG. 1, FIG. 3 is a contrast diagram of a conventionally known copy, and FIG. 4 is a plan view of the first embodiment of the present invention. , FIG. 5 is a contrast diagram of the first embodiment of the present invention, FIG. 6 is a plan view of the second embodiment of the present invention, FIG. 7 is a contrast diagram of the second embodiment of the present invention, 8, 12
... Ground color 2, 13 ... Characters, figures, etc. 4 ... Light source for copying applicant Yoshiro Nakamatsu

Claims (1)

【特許請求の範囲】[Claims] 地色を文字、図形等のカラーコントラストが肉眼では識
別出来、複写用光線ではコントラストが極めて悪いよう
にしたことを特徴とする複写できぬ被写体。
A subject that cannot be copied, characterized in that the background color of characters, figures, etc. is such that the color contrast is discernible with the naked eye, and the contrast is extremely poor when exposed to copying light.
JP139182A 1982-01-09 1982-01-09 Object which cannot be copied Pending JPS58118682A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP139182A JPS58118682A (en) 1982-01-09 1982-01-09 Object which cannot be copied

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP139182A JPS58118682A (en) 1982-01-09 1982-01-09 Object which cannot be copied

Publications (1)

Publication Number Publication Date
JPS58118682A true JPS58118682A (en) 1983-07-14

Family

ID=11500186

Family Applications (1)

Application Number Title Priority Date Filing Date
JP139182A Pending JPS58118682A (en) 1982-01-09 1982-01-09 Object which cannot be copied

Country Status (1)

Country Link
JP (1) JPS58118682A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01263686A (en) * 1988-04-15 1989-10-20 Dainichiseika Color & Chem Mfg Co Ltd Copy preventing method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01263686A (en) * 1988-04-15 1989-10-20 Dainichiseika Color & Chem Mfg Co Ltd Copy preventing method

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