JP2827786B2 - Image forming body with anti-counterfeiting by copying - Google Patents
Image forming body with anti-counterfeiting by copyingInfo
- Publication number
- JP2827786B2 JP2827786B2 JP5025229A JP2522993A JP2827786B2 JP 2827786 B2 JP2827786 B2 JP 2827786B2 JP 5025229 A JP5025229 A JP 5025229A JP 2522993 A JP2522993 A JP 2522993A JP 2827786 B2 JP2827786 B2 JP 2827786B2
- Authority
- JP
- Japan
- Prior art keywords
- pattern
- image forming
- color
- forming body
- hidden
- 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.)
- Expired - Fee Related
Links
Landscapes
- Credit Cards Or The Like (AREA)
- Printing Methods (AREA)
- Cleaning In Electrography (AREA)
- Color Electrophotography (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、株券、社債券、小切手
又はキャッシュカード等の有価証券類を、モノクロ或い
はカラーを含む各種タイプの複写機を利用しての、複写
による偽造に対する防止策を施した画像形成体に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a countermeasure against counterfeiting of securities such as stock certificates, corporate bonds, checks or cash cards by using various types of copying machines including monochrome or color. It relates to the applied image forming body.
【０００２】[0002]
【従来の技術】従来から、印刷物の複写による再現防止
技術として、複写機の解像力を利用した文字、マーク等
の隠しパターンと、そのバックグランドとなる背景パタ
ーンを網点の大、小で区別し、しかも淡い同色で印刷し
たものや、更に各パターンの印刷の区別が視認出来ない
ように、印刷物全体に地紋や絵柄層を施したコピーによ
る偽造防止策を施した印刷物が知られている。一例を記
述するならば、合成紙等の基材の表面にスクリーン線数
が１５０線で３０％の細かい網点よりなる「ニセモノ」
等の文字からなる潜像を印刷し、この周囲の背景には、
スクリーン線数が８５線の粗い網点で、肉眼では潜像も
背景も一様に見えるように印刷を施したもので、これを
複写機でコピーすると、粗い網点はそのまま再現され、
細かい網点で構成された潜像は再現時に淡くなるか或い
は再現されず、コントラストが付いて潜像を肉眼で視認
できる状態に複写される印刷物が、特開昭５４−７４１
２５号公報により周知となっている。2. Description of the Related Art Hitherto, as a technique for preventing reproduction by copying printed matter, a hidden pattern such as a character or a mark utilizing the resolving power of a copying machine and a background pattern serving as its background are distinguished by large and small halftone dots. In addition, there is known a printed matter printed in the same color, which is faint, and a printed matter which has been subjected to a counterfeiting prevention measure by a copy in which a copy-forgery-inhibited pattern or a picture layer is applied to the whole printed matter so that the printing of each pattern cannot be visually recognized. To describe one example, "Nisemono" consisting of fine halftone dots of 30% with a screen ruling of 150 on the surface of a base material such as synthetic paper
Print a latent image consisting of characters such as
The screen has a screen ruling of 85 lines and is printed so that the latent image and the background look uniform to the naked eye. When this is copied by a copying machine, the coarse halftone dots are reproduced as they are.
A latent image composed of fine halftone dots becomes faint or not reproduced at the time of reproduction, and a printed matter is copied with a contrast so that the latent image can be visually recognized by the naked eye.
No. 25, which is well known.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上述の
技術には下記に示すような問題が残されている。即ち、
上述の偽造防止に適する潜像入りの印刷物は、白黒モー
ドの複写機に対する反応はそこそこ良いが、近年急速に
普及しているカラー複写機に対しては、色及び解像力の
再現性が向上してきているため、効果が低下し判定が難
しい。更に潜像と背景となるパターンが隣接しているた
め、各パターンとの境界を視認し易く、肉眼で潜像の存
在が判ってしまう。またデザイン上の制約もあり、視認
を防ぐため地紋、絵柄層の別パターンを印刷する場合も
あるが、印刷物のデザインの自由度が損なわれる等の問
題があった。However, the above technique has the following problems. That is,
The printed matter containing a latent image suitable for preventing forgery described above has a reasonably good response to a black-and-white mode copying machine, but the reproducibility of color and resolution has been improved for a color copying machine that has rapidly spread in recent years. Therefore, the effect is reduced and the determination is difficult. Further, since the latent image and the background pattern are adjacent to each other, it is easy to visually recognize the boundary between the patterns and the presence of the latent image can be recognized by the naked eye. There are also restrictions on the design, and in some cases, another pattern such as a tint block and a picture layer is printed in order to prevent the visual recognition.
【０００４】そこで本発明は、各種タイプのモノクロ及
びカラー複写機に対する隠しパターンの顕出性や肉眼で
の各々のパターンの不視認性を向上させた画像形成体を
提供するものである。Accordingly, the present invention is to provide an image forming body in which the visibility of a hidden pattern for various types of monochrome and color copying machines and the invisibility of each pattern with the naked eye are improved.
【０００５】[0005]
【課題を解決するための手段】上記の課題を解決するた
めに、複写による偽造防止策を施した画像形成体は、大
きさが同等若しくは異なる円形状の図形の多くが、隣接
する図形と接しないよう無作為に散りばめられている模
様の中で、該円形状の図形の個々を構成単位として、文
字、マーク等の隠しパターンとその背景パターンを同
色、同濃度の色材で支持体上に形成し、前記隠しパター
ン又は背景パターンのいずれか一方の円形状の図形が網
点で形成されていることを特徴とするものである。In order to solve the above-mentioned problems, an image forming body which has been subjected to countermeasures for counterfeiting by copying has a large number of circular figures having the same or different sizes in contact with adjacent figures. In a pattern that is randomly scattered so that it is not scattered, hidden patterns such as characters and marks and their background patterns are formed on the support with color materials of the same color and density as individual units of the circular figure as constituent units. And wherein a circular figure of either the hidden pattern or the background pattern is formed by halftone dots.
【０００６】また、複写による偽造防止策を施した画像
形成体が、前記円形状の図形の個々を網点による構成単
位として文字、マーク等の隠しパターンとその背景パタ
ーンを形成し、該両パターンを同色、同濃度の色材で支
持体上に形成し、該隠しパターン又はその背景パターン
のいずれか一方が他方の網点よりも大きく若しくは小さ
く、かつモアレの発生しない角度で同じ網点を重ねて施
してあることを特徴とするものである。Further, an image forming body which has been subjected to countermeasures for counterfeiting by copying forms a hidden pattern such as a character or a mark and a background pattern thereof by using each of the circular figures as a unit of halftone dots, and forms the two patterns. Is formed on the support with a color material of the same color and density, and either the hidden pattern or its background pattern is larger or smaller than the other halftone dot, and the same halftone dot is overlapped at an angle at which no moiré occurs. It is characterized by having been given.
【０００７】また、請求項１及び請求項２に係わる、前
記複写による偽造防止策を施した画像形成体が、前記隠
しパターン又は背景パターンのいずれか一方のパターン
を、肉眼の比視感度の低い４５０ｎｍより短波長側およ
び／または６５０ｎｍより長波長側に高い反射率を有す
る色材を用いて形成し、他方のパターンは、前記一方の
パターンを形成する色材と同色、同濃度の通常の印刷イ
ンキで支持体上に形成すると共に、肉眼で各パターンが
個々に認識されないようにしてあることを特徴とするも
のである。Further, according to the first and second aspects of the present invention, the image forming body which has been subjected to the counterfeiting prevention by copying is capable of converting either the hidden pattern or the background pattern into a pattern having low relative luminous efficiency to the naked eye. It is formed by using a color material having a high reflectance on the wavelength side shorter than 450 nm and / or on the wavelength side longer than 650 nm, and the other pattern has the same color and the same density as the color material forming the one pattern. It is characterized in that it is formed on a support with ink and that each pattern is not individually recognized by the naked eye.
【０００８】更に、請求項１、２又は請求項３に係わ
る、前記複写による偽造防止策を施した画像形成体の構
成単位である図形は、円形状以外にも自由曲線（閉鎖曲
線）で囲まれている文字等を含む多角形状の図形で形成
されていることを特徴とするものである。Further, the figure as a constitutional unit of the image forming body subjected to the counterfeiting prevention by copying according to claim 1, 2 or 3 is surrounded by a free curve (closed curve) other than a circular shape. It is characterized by being formed of a polygonal figure including characters and the like.
【０００９】[0009]
【作用】本発明の画像形成体は、隠しパターンとその背
景パターンを同色の色相を持ったインキで印刷され、ま
た無作為に散りばめられた大きさが同等若しくは異なる
円形状の図形で形成され、しかも隠しパターン又は背景
パターンのいずれか一方又は両方が網点で支持体状に形
成されているので、隠しパターンの存在が視認できな
い。また淡い色の色材で印刷されているので、この上に
印刷又は印字等の記される文字、画線、画像等の主体画
像のの視認性やデザイン等を妨げない。According to the image forming body of the present invention, the hidden pattern and its background pattern are printed with ink having the same color hue, and are randomly formed into circular figures having the same or different sizes. In addition, since one or both of the hidden pattern and the background pattern are formed in the shape of a support with halftone dots, the presence of the hidden pattern cannot be visually recognized. In addition, since the printing is performed with a light color material, the visibility, design, and the like of the main image such as characters, image lines, and images printed or printed thereon are not hindered.
【００１０】＜モノクロ複写に対する作用＞前記隠しパ
ターン、又は背景パターンのいずれか一方が網点で形成
されているか、前記隠しパターンは大きい網点、背景パ
ターンは小さい網点とすると共に、隠しパターンの網点
を二重にすることで、複写機の解像力の差とカーボンの
トナーでパターンが濃く再現されて、背景パターンと隠
しパターンにコントラストの差が生じて隠しパターンが
明瞭に浮かび上がって視認される。<Effect on Monochrome Copying> Either the hidden pattern or the background pattern is formed by a halftone dot, the hidden pattern is a large halftone dot, the background pattern is a small halftone dot, and the hidden pattern is a small halftone dot. By duplicating the halftone dots, the pattern is reproduced densely with the difference in the resolution of the copier and the carbon toner, causing a difference in the contrast between the background pattern and the hidden pattern, and the hidden pattern is clearly visible and visible. You.
【００１１】＜色再現性が高く（分光反射率曲線に忠実
な再現性）解像力の高い電子写真方式のカラー複写機や
銀塩タイプのカラー複写機に対する作用＞本発明の画像
形成体において、背景パターンには肉眼で比視感度の低
い４５０ｎｍより短波長側及び／又は６５０ｎｍより長
波長側に高い反射率を有し緑色に調色した色材の分光反
射率曲線は、図４(A) に示す(a) となり、隠しパターン
に用いる前記の色材と同色（緑色）、同濃度の通常の印
刷インキの色素の分光反射曲線は、図４(A) に示される
(b) となる。ここで肉眼の比視感度曲線は図４(B)のよ
うになり、５００〜６５０ｎｍの波長はこれ以外の波長
より強く感じるので、背景パターンと隠しパターンの分
光反射率曲線の６５０〜７００ｎｍで示される反射率の
差を感じないので、本発明の画像形成体は肉眼では同じ
緑色に認識される。しかしながら、色再現性の高い電子
写真方式のカラー複写機や銀塩タイプのカラー複写機
は、高い反射率を示す曲線(a) の６５０〜７００ｎｍの
領域は赤色として再現されるために、背景パターンの緑
色が黄褐色に再現され、隠しパターンはそのまま緑色と
して再現され、複写物は色のコントラストに差が生じ
て、隠しパターンが浮かび上がり肉眼で視認することが
できる。<Effect of High Color Reproducibility (Reproducibility Faithful to Spectral Reflectance Curve) and High Resolution Electrophotographic Color Copier or Silver-Salt Type Color Copier> FIG. 4 (A) shows a spectral reflectance curve of a color material which has a high reflectance on the short wavelength side of 450 nm and / or a long wavelength side of 650 nm and has a low relative luminous efficiency to the naked eye and is toned green. FIG. 4A shows a spectral reflection curve of a dye of a normal printing ink having the same color (green) and the same density as that of the color material used for the hidden pattern.
(b). Here, the relative luminous efficiency curve of the naked eye is as shown in FIG. 4 (B). Since the wavelength of 500 to 650 nm feels stronger than the other wavelengths, the spectral reflectance curve of the background pattern and the hidden pattern is shown at 650 to 700 nm. Since no difference in reflectance is felt, the image forming body of the present invention is recognized as the same green color by the naked eye. However, in an electrophotographic color copier or a silver halide type color copier having high color reproducibility, the 650-700 nm region of the curve (a) showing high reflectance is reproduced as red, so that the background pattern Is reproduced in yellow-brown, the hidden pattern is reproduced as it is as green, and a difference occurs in the color contrast of the copy, so that the hidden pattern emerges and can be visually recognized by the naked eye.
【００１２】＜オリジナルに対する色再現性が肉眼に忠
実なように４００〜４５０ｎｍ近辺及び６５０ｎｍ近辺
〜７００ｎｍの領域をフィルター等でカットしてある電
子写真方式のカラー複写機に対する作用＞一般のカラー
複写機は、イエロー、マゼンタ、シアン、ブラックの４
色のトナーやリボンを使用しているが、イエローの濃度
が低いために、他の色よりも標準色を再現する場合、他
の色に比べてイエローの量が多くなる。この為、標準色
で設定してあったり、解像力が低い複写機では黄色分の
多い淡色系の色は、複写物が、シアンやマゼンタの色分
のトナーの使用量が極端に抑えられ、イエロー分が普通
に使用される為に黄色に変色して再現されたり、小さな
網点で構成されているものは、黄色に再現されるか、無
くなってしまう。この為、例えば緑色の淡い色で印刷し
た本発明の画像形成体を複写すると、小さな網点で構成
した背景パターンは黄色に変色するか、無くなってしま
い、大きな網点で構成したパターンは緑色に再現される
か、再現されずに無くなってしまう為に、色のコントラ
ストがつき隠しパターンが視認されか、有るべきデザイ
ンが無くなってしまうので複写物と識別される。<Effects on an electrophotographic color copying machine in which a region around 400 to 450 nm and a region around 650 nm to 700 nm are cut by a filter or the like so that the color reproducibility of the original is close to the naked eye> General color copying machine Is 4 for yellow, magenta, cyan, and black
Although color toners and ribbons are used, when the standard color is reproduced more than other colors due to the lower density of yellow, the amount of yellow is larger than other colors. For this reason, in a copying machine having a standard color setting or a low resolving power, a light-colored color having a large amount of yellow can be used in a copy machine in which the amount of toner used for the cyan and magenta colors is extremely suppressed, and Minutes that are normally used are reproduced with discoloration to yellow, or those composed of small halftone dots are reproduced or lost in yellow. For this reason, for example, when the image forming body of the present invention printed in a pale green color is copied, the background pattern composed of small dots turns yellow or disappears, and the pattern composed of large dots becomes green. Since the image is reproduced or disappears without being reproduced, the hidden pattern is visually recognized, or the design to be used is lost.
【００１３】[0013]
【実施例】図に基づき実施例を説明する。図１は、本発
明の実施例における大きさの異なる円形状の図形で構成
された隠しパターン(A) と背景パターン(B) を拡大した
説明図である。図２は、一方はベタ印刷し、他方を網点
で形成した構成単位を示す大きさの異なる円形状の図形
(A) と前記の構成単位で支持体上に形成した隠しパター
ンと背景パターン(B) を示す説明図である。また図３
は、他の実施例における大きさの異なる円形状の図形を
網点による構成単位とした説明図(A) と前記の構成単位
で支持体上に形成した隠しパターンと背景パターン(B)
を示す説明図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is an explanatory diagram showing an enlarged view of a hidden pattern (A) and a background pattern (B) composed of circular figures having different sizes according to the embodiment of the present invention. FIG. 2 shows circular figures of different sizes showing structural units formed by solid printing on one side and halftone dots on the other side.
FIG. 3A is an explanatory view showing a hidden pattern and a background pattern (B) formed on a support by the constituent units. FIG.
(A) is an explanatory diagram of a circular figure having a different size in another embodiment as a structural unit by halftone dots, and a hidden pattern and a background pattern (B) formed on a support in the structural unit described above.
FIG.
【００１４】本発明の複写による偽造防止策を施した画
像形成体は、紙、合成樹脂紙、塩化ビニルシート、ＰＥ
Ｔ等の支持体(15)上に、無作為に描かれた円形状の図形
(10)を作り、この図形を画素として隠しパターン(11)
（例えば、複写、コピー、ニセモノ等の文字或いはマー
クが好ましい）を作る。この隠しパターンをポジとする
とネガの関係にある、隠しパターンを除くバックグラン
ドとして、上記同様に円形状の図形(10)で背景パターン
(12)を作る。またこの円形状の図形は、同じ大きさの図
形を用いることもできるが、異なる大きさの図形を無作
為に散りばめた模様が好ましく、かつ図形の多くが隣接
する図形と接しないように無作為に散りばめた模様とす
る（図１を参照）。更に、図２に示すように図形の構成
単位を一方をベタ(T) 、他方を網点(S) で形成したもの
で、例えば前記隠しパターン(11)又はこの背景パターン
(12)のいずれか一方の取り出したパターンに、６５線〜
１５０線で１５〜４０％（面積率）のスクリーンを用い
て網かけを行い、網点(S) で形成されたパターン構成と
し、両方のパターンを組合わせて色相、色濃度を合わせ
て印刷する。この印刷の際、両パターン共に淡い色の色
相に調色したインキを用いることが好ましい。上述した
実施例においては、一方の図形の構成単位をベタ(T) と
したが、これに限定されるものではなく、万線、破線、
或いは網点と線の組合せなども可能であり、適宜選択す
ることができる。The image forming body of the present invention which has been subjected to the counterfeiting by copying is paper, synthetic resin paper, vinyl chloride sheet, PE
A circular figure drawn at random on a support (15) such as T
Create (10) and use this figure as a pixel to hide the pattern (11)
(For example, characters or marks such as copy, copy, fake, etc. are preferable). If this hidden pattern is positive, it has a negative relationship.As a background excluding the hidden pattern, a circular pattern (10) is used as the background pattern as described above.
Make (12). Although the same figure can be used for the circular figure, it is preferable that the figure is a pattern in which figures of different sizes are scattered at random, and the figure is randomly selected so that many of the figures do not touch adjacent ones. (See FIG. 1). Further, as shown in FIG. 2, one of the constituent units of the figure is formed by a solid (T) and the other is formed by a halftone dot (S), for example, the hidden pattern (11) or the background pattern.
(12) Either of the patterns taken out, 65 lines ~
Shading is performed using a screen of 15 to 40% (area ratio) with 150 lines to form a pattern composed of halftone dots (S), and printing is performed by combining both patterns with the same hue and color density. . At the time of this printing, it is preferable to use an ink toned to a light color hue for both patterns. In the above-described embodiment, the constituent unit of one figure is solid (T). However, the present invention is not limited to this.
Alternatively, a combination of a halftone dot and a line is also possible, and can be appropriately selected.
【００１５】また、図３に示すように、上述した大きさ
が同等若しくは異なる大、小の円形状の図形を網点(S)
で形成するもので、例えば、隠しパターン(11)をスクリ
ーン線数６５線、２０％の網点(S) で形成し、背景パタ
ーン(12)をスクリーン線数１５０線、２０％の網点(S)
で形成し、更に６５線２０％の網点で形成された隠しパ
ターン上に、６５線２０％の網点をスクリーン角度を変
えて（モアレの発生を防ぐ為）重ねて印刷した網点の図
形(10)で構成された画像形成体である。この際の網点の
形成は、スクリーンが６５線〜１５０線で１５％〜４０
％の範囲で組み合わせることが好ましい。このことは、
大、小の網点のみで隠しパターンと背景パターンを形成
すると、両パターンの区画された境界が視認できるが、
スクリーン角度を変えて重ねることで判らなくなる。As shown in FIG. 3, large and small circular figures having the same or different sizes as described above are represented by halftone dots (S).
For example, the hidden pattern (11) is formed with a screen ruling of 65 lines and 20% of halftone dots (S), and the background pattern (12) is formed with a screen ruling of 150 lines and a 20% halftone dot ( S)
The figure of halftone dots printed by changing the screen angle (to prevent the occurrence of moiré) on halftone dots of 65 lines by changing the screen angle on a hidden pattern formed by halftone dots of 65 lines and 20% An image forming body constituted by (10). At this time, the halftone dots are formed when the screen is 65 to 150 lines and 15% to 40%.
% Are preferably combined. This means
If a hidden pattern and a background pattern are formed using only large and small halftone dots, the boundary between the two patterns can be visually recognized.
Changing the screen angle makes it difficult to understand.
【００１６】上記の印刷は、淡い色相に調色した印刷イ
ンキを用いたが、前記隠しパターン(11)又はこの背景パ
ターン(12)のいずれか一方のパターンに、肉眼での視感
度の低い４５０ｎｍより短波長側及び／又は６５０ｎｍ
より長波長に高い反射率を有する色材を、コバルトブル
ーを用いて緑色に調色して支持体上に印刷し、他のパタ
ーンは通常の印刷インキにより前記の緑色に調色した色
材に色相、濃度を合わせて印刷することで、各種タイプ
のカラー複写機に対応することができる。In the above printing, a printing ink toned to a light hue was used. However, one of the hidden pattern (11) and the background pattern (12) was provided with 450 nm having low visibility to the naked eye. Shorter wavelength side and / or 650 nm
A color material having a higher reflectance at a longer wavelength is printed on a support by toning the color to green using cobalt blue, and the other pattern is applied to the color material toned to green using a normal printing ink. By printing with matching hue and density, it is possible to support various types of color copying machines.
【００１７】また、隠しパターン(11)、背景パターン(1
2)を構成する図形(10)は、円形状に限定するものではな
く、文字や星形等、自由曲線（閉鎖曲線）で囲まれた多
角形状の図形（図示はしない）で形成するこもでき、適
宜選択することができる。The hidden pattern (11) and the background pattern (1
The figure (10) that constitutes 2) is not limited to a circular shape, but may be a polygonal figure (not shown) surrounded by a free curve (closed curve) such as a character or a star. Can be appropriately selected.
【００１８】[0018]
【発明の効果】本発明の複写による偽造防止策を施した
画像形成体は、複写する以前における隠しパターンと背
景パターン印刷の境界が判らないため、隠しパターンの
存在を視認し難く、またこの隠しパターン、背景パター
ン上に他の文字、絵柄等の主体画像が施されていても、
両パターンが淡い色で形成されるので主体画像は見にく
いことがなく、複写した際、複写画像には複写物である
ことを証明する隠しパターンが明瞭なコントラストをも
って顕出される効果があり、各種印刷物のバックグラン
ドとしての地紋等として使用できる。また本発明の複写
による偽造防止策を施した画像形成体は、各種タイプの
モノクロ及びカラー複写機に対して対応することができ
る等種々の優れた効果を生ずるものである。According to the image forming apparatus of the present invention in which the counterfeiting prevention by copying is performed, the boundary between the hidden pattern and the background pattern printing before copying is not known, so that the existence of the hidden pattern is hard to visually recognize. Even if the main image of other characters, patterns, etc. is given on the pattern, background pattern,
Because both patterns are formed in pale colors, the main image is not difficult to see, and when copied, the copied image has the effect of revealing a hidden pattern that proves to be a copy with a clear contrast, and various printed materials Can be used as a background pattern or the like. In addition, the image forming body of the present invention, in which countermeasures for counterfeiting by copying are performed, produces various excellent effects such as being applicable to various types of monochrome and color copying machines.
【図１】本発明の実施例における大きさの異なる円形状
の図形で構成された隠しパターン(A) と背景パターン
(B) の拡大した一例を示す説明図である。FIG. 1 shows a hidden pattern (A) and a background pattern composed of circular figures having different sizes according to an embodiment of the present invention.
It is an explanatory view showing an example which expanded (B).
【図２】本発明の一実施例における一方はベタで形成し
他方を網点で形成した構成単位を示す大きさの異なる円
形状の図形(A) と前記の構成単位で支持体上に形成した
隠しパターンと背景パターン(B) を示す説明図である。FIG. 2 shows an embodiment of the present invention, in which a solid figure (A) showing a structural unit having one solid shape and the other being a halftone dot, and a structural unit having different sizes formed on a support. FIG. 4 is an explanatory diagram showing a hidden pattern and a background pattern (B).
【図３】本発明の他の実施例における大きさの異なる円
形状の図形を網点による構成単位とした説明図(A) と前
記の構成単位で支持体上に形成した隠しパターンと背景
パターン(B) を示す説明図である。FIG. 3A is an explanatory view showing a circular figure having a different size in another embodiment of the present invention as a structural unit of halftone dots, and a hidden pattern and a background pattern formed on a support by the structural unit; It is explanatory drawing which shows (B).
【図４】本発明に係わる分光反射率曲線(A) と肉眼の比
視感度曲線(B) を示す説明図である。FIG. 4 is an explanatory diagram showing a spectral reflectance curve (A) and a relative luminous efficiency curve (B) of the naked eye according to the present invention.
１０ …異なる大小で構成された円形状の図形 １１ …隠しパターン １２ …背景パターン １５ …支持体 Ｓ …網点 Ｔ …ベタ印刷 Reference numeral 10: a circular figure composed of different sizes 11: a hidden pattern 12, a background pattern 15, a supporter S, halftone dots T, solid printing
Claims (4)
の多くが、隣接する図形と接しないよう無作為に散りば
められている模様の中で、前記円形状の図形の個々を構
成単位として、文字、マーク等の隠しパターンとその背
景パターンを同色、同濃度の色材で支持体上に形成し、
前記隠しパターン又は背景パターンのいずれか一方が網
点で形成されていることを特徴とする複写による偽造防
止策を施した画像形成体。In a pattern in which many circular figures having the same or different sizes are randomly scattered so as not to be in contact with an adjacent figure, each of the circular figures is used as a constituent unit. Form a hidden pattern such as characters and marks and its background pattern on the support with the same color and the same density of color material,
An image forming body provided with a counterfeiting prevention measure by copying, wherein either the hidden pattern or the background pattern is formed by halftone dots.
の多くが、隣接する図形と接しないよう無作為に散りば
められている模様の中で、前記円形状の図形の個々を網
点による構成単位して文字、マーク等の隠しパターンと
その背景パターンを形成し、該両パターンを同色、同濃
度の色材で支持体上に形成し、該隠しパターン又はその
背景パターンのいずれか一方が他方の網点よりも大きく
若しくは小さく、かつモアレの発生しない角度で同じ網
点を重ねて施してあることを特徴とする複写による偽造
防止策を施した画像形成体。2. In a pattern in which many circular figures having the same or different sizes are randomly scattered so as not to be in contact with an adjacent figure, each of the circular figures is constituted by halftone dots. A hidden pattern such as a character and a mark and its background pattern are formed in units, and both patterns are formed on a support with a color material of the same color and density, and one of the hidden pattern and its background pattern is the other. An image forming body provided with a countermeasure to prevent forgery by copying, characterized in that the same halftone dot is overlapped at an angle which is larger or smaller than the halftone dot and which does not generate moiré.
れか一方のパターンを、肉眼の比視感度の低い４５０ｎ
ｍより短波長側及び／又は６５０ｎｍより長波長側に高
い反射率を有する色材を用いて形成し、他方のパターン
は、前記一方のパターンを形成する色材と同色、同濃度
の色材で支持体上に形成すると共に、肉眼で各パターン
が個々に認識されないようにしてあることを特徴とする
請求項１又は請求項２に記載の複写による偽造防止策を
施した画像形成体。3. The method according to claim 1, wherein one of the hidden pattern and the background pattern is performed using 450n having a low relative luminous efficiency to the naked eye.
m, and / or a color material having a high reflectance on the longer wavelength side than 650 nm. The other pattern is formed of a color material having the same color and density as the color material forming the one pattern. 3. The image forming body according to claim 1 or 2, wherein the image forming body is formed on a support so that each pattern is not individually recognized by the naked eye.
鎖曲線）で囲まれている多角形状の図形で形成されてい
ることを特徴とする請求項１、請求項２又は請求項３に
記載の複写による偽造防止策を施した画像形成体。4. The apparatus according to claim 1, wherein the figure as the constituent unit is formed of a polygonal figure surrounded by a free curve (closed curve). An image forming body that has been subjected to countermeasures against forgery by copying described in the above.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5025229A JP2827786B2 (en) | 1993-02-15 | 1993-02-15 | Image forming body with anti-counterfeiting by copying |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5025229A JP2827786B2 (en) | 1993-02-15 | 1993-02-15 | Image forming body with anti-counterfeiting by copying |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06239078A JPH06239078A (en) | 1994-08-30 |
| JP2827786B2 true JP2827786B2 (en) | 1998-11-25 |
Family
ID=12160146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5025229A Expired - Fee Related JP2827786B2 (en) | 1993-02-15 | 1993-02-15 | Image forming body with anti-counterfeiting by copying |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2827786B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5162802B2 (en) * | 2001-01-23 | 2013-03-13 | 凸版印刷株式会社 | Anti-counterfeiting patterns and securities using them |
| KR100437448B1 (en) * | 2002-02-25 | 2004-06-23 | 알파로직스(주) | 3D puzzled image for the prevention of copying and counterfeiting by latent image emergence of picture information coding image and Manufacturing method thereof |
| JP2004110689A (en) | 2002-09-20 | 2004-04-08 | Fuji Xerox Co Ltd | Additional information recorder to print medium, its method, and image forming apparatus |
| KR100541273B1 (en) * | 2003-04-16 | 2006-01-10 | 이종희 | Anti-copying method and system for hard-copy documents |
| JP5262961B2 (en) * | 2008-08-14 | 2013-08-14 | 凸版印刷株式会社 | Printed matter |
| CN109703227B (en) * | 2019-01-21 | 2024-01-05 | 东莞运城制版有限公司 | Method for manufacturing anti-counterfeiting pattern integrating hidden lines, latent images and unlocking by embossing |
-
1993
- 1993-02-15 JP JP5025229A patent/JP2827786B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06239078A (en) | 1994-08-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5479507A (en) | Copy indicating security device | |
| JP5285642B2 (en) | High resolution scaleable gloss effect | |
| JP2763725B2 (en) | Form for which forgery has been prevented, and a method of manufacturing the form | |
| MX2008014176A (en) | Security enhanced print media with copy protection. | |
| JP4380107B2 (en) | Copy forgery prevention paper and securities using this copy forgery prevention paper | |
| JP2695523B2 (en) | Printed material suitable for copy protection | |
| JP2827786B2 (en) | Image forming body with anti-counterfeiting by copying | |
| JP3030534U (en) | Printed matter with small letters | |
| JP3495822B2 (en) | Copy-prevention printed matter | |
| JP3495829B2 (en) | Copy preventive printed matter and method of manufacturing the same | |
| JP2008503155A (en) | Full color scan protection for documents | |
| JPH0768981A (en) | Forgery preventive printed matter | |
| JPH10278408A (en) | Copy preventive printed matter | |
| JPH11291610A (en) | Intaglio latent image and forming method for the latent image | |
| JP2021011098A (en) | Copy prevention sheet and manufacturing method thereof | |
| JPH10119416A (en) | Duplication preventing printed matter and producing method thereof | |
| JP3482251B2 (en) | Printed copy to prevent copy forgery | |
| JP2999354B2 (en) | Anti-counterfeit ink and anti-counterfeit printed matter | |
| JP3501334B2 (en) | Copy-prevention printed matter and method for producing the same | |
| JP3509928B2 (en) | Printed copy to prevent forgery | |
| JPH0776195A (en) | Copy preventive printed matter | |
| JPH08244389A (en) | Printed material with latent image | |
| JPH08169193A (en) | Copy forgery-proof sheet | |
| JP3821497B2 (en) | Copy forgery prevention | |
| JP2001130124A (en) | Printed product having forgery preventive structure, method for discriminating it and discriminating implement |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |