JPS6017778A - Copy impossible form and its manufacture - Google Patents

Abstract

PURPOSE:To prevent the copy and the recopy of a secret document, etc. by preparing a form disabling the copy when it is set to a copying machine. CONSTITUTION:A ground color surface which is developed in black when it is copied, and a continuous pattern making the contrast against this ground color surface distinctive, and constituting to dazzle a naked eye are formed. That is to say, the ground color surface 2, for instance, consisting of a net point of 150 lines.50% is printed by ink of a sepia tone on the whole surface of a form 1, also a continuous pattern 3 which has combined a vertical and horizontal lattice-shaped pattern of about 1mm. interval with a tortoise shell-shaped pattern whose diameter is 4-5mm. is printed at the same time, and a black ink character is written on this from by writing or printing. As for the form obtained in this way, the constrast of the ground color surface 2 and the continuous pattern 3 becomes remarkable, the ground color surface and the pattern look light and dark, respectively, and a density difference is observed in both of them. Accordingly, a character written on the form is seen clearly in a state as it is, but when it is copied, it is assimilated to the pattern 2 and cannot be discriminated. That is to say, when this form is copied, the pattern and the character cannot be discriminated from each other, and the character cannot be read.

Description

【発明の詳細な説明】 本発明はカラー・白黒の別に拘わらず複写機Ｋかけると
コピーが不能となる用紙及びその製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a paper that cannot be copied by a copying machine, regardless of whether it is color or black and white, and a method for manufacturing the same.

機密書類等のコピー・再コピーを防止するためコピー後
に印刷又は筆記された文字が見えなくなるようにした印
刷物が種々提案されている。In order to prevent confidential documents from being copied or re-copied, various printed matter have been proposed in which printed or written characters are no longer visible after copying.

しかして従来品は用紙表面に特殊インキや特殊物質を施
す形式のものが殆んどで製造工程が煩雑となったシ製品
が高価となる欠点を有していた。However, most of the conventional products require special ink or special substances to be applied to the surface of the paper, which has the disadvantage that the manufacturing process is complicated and the products are expensive.

本発明はこれらの欠点を解消すべく提案されたもので、
いま実施例につき説明すると以下のとおシである。The present invention was proposed to solve these drawbacks.
An example will now be explained as follows.

用紙１の表面全体に、セピア調のインキで１５０線・５
０チの網点よりなる地色面２を印刷し、且つ直径４〜５
ミリの亀甲状パターンに約１ミリ間隔の縦横格子状パタ
ーンを組合わせた連続状パターン３を同時印刷し、この
用紙上に筆記又は印刷によシ黒インキ文字を書記せしめ
るものである。150 lines/5 in sepia tone ink on the entire surface of paper 1
Print the background color surface 2 consisting of halftone dots with a diameter of 4 to 5.
A continuous pattern 3, which is a combination of a hexagonal pattern of millimeters and a vertical and horizontal lattice pattern of about 1 millimeter intervals, is simultaneously printed, and black ink characters are written or printed on this paper.

以上のようにして得られた用紙は、地色面２と連続状パ
ターン３のコントラストが顕著となって地色面は淡く、
パターンは濃く外見され、両者に濃度差が認められる。In the paper obtained in the above manner, the contrast between the ground color surface 2 and the continuous pattern 3 is remarkable, and the ground color surface is pale.
The pattern appears dark and there is a difference in density between the two.

したがって用紙上に書記した文字はそのままの状態では
明瞭に見えるが、コピーしたときにはパターン３に同化
して判別されなくなる。っまシ地色面２とパターン３は
コピーにかけると黒ずんで見えるのとパターンの構成が
黒インキ文字の構成と相紛られしくなる結果パターンと
文字の区別がつかず文字の判読が不可能となるわけであ
る。Therefore, characters written on paper can be clearly seen as they are, but when copied, they become assimilated into pattern 3 and cannot be distinguished. When copying background color side 2 and pattern 3, they appear darkened and the composition of the pattern becomes confused with the composition of black ink letters.As a result, it is impossible to distinguish between the pattern and the letters, making it impossible to decipher the letters. That is why.

しかしてインキの色相はコピーすると黒く発色゛する暗
色がかったものを要し、他にグレー調・うぐいす色調等
が好適し、赤・青・黄等の明色インキは不可である。Therefore, the hue of the ink needs to be a dark color that will appear black when copied, and other suitable colors include gray and gray tones, and bright colored inks such as red, blue, and yellow are not acceptable.

また地色面２の網点とパターン３は文字の大小太さなど
に応じた大きさのものをあらかじめ選定しておき、就中
パターン形状は上記実施例のものに限定はされないが、
肉眼をげん惑してコピー後の文字が判別できなくなる複
雑な構成をとることは勿論である。Further, the halftone dots on the background color surface 2 and the pattern 3 are selected in advance in a size corresponding to the size and thickness of the characters, and the shape of the pattern is not limited to that of the above embodiment, but
Needless to say, it has a complicated structure that confuses the naked eye and makes it impossible to distinguish the characters after copying.

なお上記実施例では網点と連続状パターンの組合わせに
よる一回刷シの場合につき述べたが同一インキによる所
謂べた刷りと連続状パターンの組合わせによる方法によ
っても本発明の目的は達成される。In the above embodiment, the case of single printing using a combination of halftone dots and continuous patterns was described, but the object of the present invention can also be achieved by a method using a combination of so-called solid printing and continuous patterns using the same ink. .

すなわち本発明の用紙は複写機でコピーすると黒く発色
する色相の地色面と、該地色面とのコントラスト顕著に
して且つ肉眼をげん惑する構成の連続状パターンを印刷
し、この紙面上に黒インキ文字を暗記又は印刷により書
記せしめることによって製造されたコピー不能用紙であ
るから、地色面２とパターン３におのずから濃度差が現
われ、然もこの濃度差は異なるインキや特殊インキを使
用するものではないため安価に得られる効果も併せ具有
する すなわち従来は用紙に特殊インキや物質を用いる手段に
よったため製造工程がか＼るのと製品価格も高くなる欠
点があったが、本発明の用紙はインキの色相とパターン
形状によって地色面とパターンに濃度差をもたせるとい
う手法を採った結果、複写機の再現精度の弱点が遺憾な
く発揮されて黒インキ文字が識別できず、機密事項の漏
洩防止に役立つと共に量産に好適すること顕著な効果が
ある。That is, the paper of the present invention is printed with a continuous pattern having a structure that makes the contrast between the background color surface of a hue that becomes black when copied with a copying machine and the background color surface, and is confusing to the naked eye, and printed on this paper surface. Since it is a non-copyable paper manufactured by memorizing or printing black ink characters, a density difference naturally appears between the background color side 2 and the pattern 3, and this density difference is created by using different ink or special ink. Because it is not a product, it also has the effect of being inexpensive.In other words, conventional methods used special inks and substances for paper, which had the drawbacks of requiring a long manufacturing process and increasing the product price. As a result of adopting a method in which the paper has a density difference between the ground color surface and the pattern depending on the ink hue and pattern shape, the weaknesses in the reproduction accuracy of copying machines are fully exploited, making it impossible to distinguish black ink characters and confidential information. It has a remarkable effect in preventing leakage and is suitable for mass production.

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

図は本発明に係る用紙の一実施例を示す一部拡大平面図
である。 １は用紙、２は地色面、３は連続状パターン。 特許出願人　株式会社　細川活版所 代理人　弁理士　金　子　幸　彦The figure is a partially enlarged plan view showing one embodiment of the paper according to the present invention. 1 is the paper, 2 is the ground color surface, and 3 is the continuous pattern. Patent applicant Hosokawa Letterpress Co., Ltd. Agent Patent attorney Yukihiko Kaneko

Claims (1)

【特許請求の範囲】 １、コピーすると黒く発色する地色面と、該地色面との
コントラスト顕著にして且つ肉眼をげん惑する構成の連
続状パターンを形成したことを特徴とするコピー不能用
紙。 ２、コピーすると黒く発色する暗色ががったインキを用
いて地色面を印刷し、該地色面とのコントラストを顕著
にする線によって肉眼をげん惑する構成の連続状パター
ンを印刷してなる紙面上に、筆記又は印刷にょυ黒イン
キ文字を書記するようにしたコピー不能用紙の製造方法
。[Scope of Claims] 1. Non-copyable paper characterized by forming a background color surface that becomes black when copied, and a continuous pattern with a structure that makes the contrast between the background color surface remarkable and confuses the naked eye. . 2. Print the background color using dark ink that turns black when copied, and print a continuous pattern that confuses the naked eye with lines that create a noticeable contrast with the background color. A method for manufacturing non-copyable paper on which black ink characters are written or printed.