JPH06239078A - Image formation body with countermeasure applied to prevent forgery in copying - Google Patents
Image formation body with countermeasure applied to prevent forgery in copyingInfo
- Publication number
- JPH06239078A JPH06239078A JP5025229A JP2522993A JPH06239078A JP H06239078 A JPH06239078 A JP H06239078A JP 5025229 A JP5025229 A JP 5025229A JP 2522993 A JP2522993 A JP 2522993A JP H06239078 A JPH06239078 A JP H06239078A
- Authority
- JP
- Japan
- Prior art keywords
- pattern
- copying
- hidden
- color
- same
- 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.)
- Granted
Links
- 230000015572 biosynthetic process Effects 0.000 title abstract description 4
- 239000000470 constituent Substances 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 14
- 230000002265 prevention Effects 0.000 claims description 8
- 238000004040 coloring Methods 0.000 claims description 7
- 206010047531 Visual acuity reduced Diseases 0.000 claims 1
- 230000004315 low visual acuity Effects 0.000 claims 1
- 239000003086 colorant Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 230000003595 spectral effect Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000004304 visual acuity Effects 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- GGCZERPQGJTIQP-UHFFFAOYSA-N sodium;9,10-dioxoanthracene-2-sulfonic acid Chemical compound [Na+].C1=CC=C2C(=O)C3=CC(S(=O)(=O)O)=CC=C3C(=O)C2=C1 GGCZERPQGJTIQP-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 229910017052 cobalt Inorganic materials 0.000 description 1
- 239000010941 cobalt Substances 0.000 description 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Printing Methods (AREA)
- Cleaning In Electrography (AREA)
- Color Electrophotography (AREA)
- Inspection Of Paper Currency And Valuable Securities (AREA)
- Credit Cards Or The Like (AREA)
Abstract
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 provides a measure for preventing counterfeiting of securities such as stock certificates, corporate bonds, checks and cash cards by copying using various types of copying machines including monochrome or color. The present invention relates to a formed 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 Conventionally, as a technique for preventing the reproduction of printed matter by copying, a hidden pattern such as characters and marks utilizing the resolving power of a copying machine and a background pattern serving as the background are distinguished by the large and small halftone dots. Moreover, there are known prints printed in the same light color, and prints provided with a counterfeit prevention measure by copying with a tint block or a pattern layer on the entire print so that the distinction between the prints of each pattern cannot be visually recognized. To give an example, a "fake thing" consisting of 30% fine halftone dots with a screen ruling of 150 on the surface of a substrate such as synthetic paper.
A latent image consisting of letters such as is printed, and in the surrounding background,
The screen is a rough halftone dot with 85 lines, printed so that the latent image and the background can be seen uniformly by the naked eye. When this is copied with a copying machine, the rough halftone dot is reproduced as it is.
A latent image composed of fine halftone dots becomes faint or not reproduced at the time of reproduction, and a printed matter in which a latent image is copied with a contrast so that the latent image can be visually recognized is disclosed in JP-A-54-741.
It is known from Japanese Patent No. 25.
【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-mentioned technique still has the following problems. That is,
The above-mentioned printed matter with a latent image suitable for preventing forgery responds moderately to black-and-white mode copying machines, but the reproducibility of color and resolving power has been improved for color copying machines which have rapidly spread in recent years. Therefore, the effect is reduced and it is difficult to judge. Further, since the latent image and the background pattern are adjacent to each other, it is easy to visually recognize the boundary between each pattern and the existence of the latent image can be visually recognized. Further, there are restrictions on the design, and there are cases in which different patterns of the tint block and the picture layer are printed to prevent visual recognition, but there is a problem that the degree of freedom in designing the printed matter is impaired.
【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。Therefore, the present invention provides an image forming body in which the visibility of hidden patterns and the invisibility of each pattern with the naked eye are improved for various types of monochrome and color copying machines.
【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, in an image forming body having a forgery prevention measure by copying, many circular figures having the same size or different sizes are in contact with the adjacent figures. In a pattern randomly scattered so that it does not occur, hidden patterns such as letters and marks and their background patterns are formed on the support with color materials of the same color and the same density, using each of the circular figures as a constituent unit. It is characterized in that 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, the image forming body subjected to the forgery prevention measure by copying forms a hidden pattern such as characters and marks and its background pattern by using each of the circular figures as a constituent unit by a halftone dot, and the both patterns are formed. Are formed on the support with the same color and the same density on the support, and either the hidden pattern or the background pattern is larger or smaller than the other halftone dot, and the same halftone dot is overlapped at an angle that does not cause moire. It is characterized by being applied.
【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 forgery prevention measure by copying has one of the hidden pattern and the background pattern, and the relative visual sensitivity of the naked eye is low. It is formed by using a coloring material having a high reflectance on a shorter wavelength side than 450 nm and / or a longer wavelength side than 650 nm, and the other pattern is a normal printing of the same color and the same density as the coloring material forming the one pattern. It is characterized in that each pattern is formed with ink on the support and 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, according to the first, second or third aspect, the figure which is a constitutional unit of the image forming body for which the forgery prevention by copying is applied is surrounded by a free curve (closed curve) in addition to the circular shape. It is characterized in that it is formed by 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。In the image forming body of the present invention, the hidden pattern and the background pattern are printed with the ink having the same hue, and are randomly scattered and have the same or different circular shapes. Moreover, since either one or both of the hidden pattern and the background pattern are formed as a support with halftone dots, the existence of the hidden pattern cannot be visually recognized. Further, since it is printed with a light color material, it does not interfere with the visibility or design of the main image such as characters printed on or printed on, printing lines, images and the like.
【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。<Operation on Monochrome Copy> Whether either the hidden pattern or the background pattern is formed by halftone dots, the hidden pattern is formed by large halftone dots, and the background pattern is formed by small halftone dots, and the hidden pattern By duplicating the halftone dots, the difference in resolving power of the copying machine and the pattern of carbon toner are reproduced densely, and there is a difference in contrast between the background pattern and the hidden pattern, and the hidden pattern is clearly visible and visible. It
【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。<Operation on electrophotographic color copying machine or silver salt type color copying machine having high color reproducibility (reproducibility faithful to spectral reflectance curve) and high resolution> In the image forming body of the present invention, the background The spectral reflectance curve of the color material that has a high reflectance on the shorter wavelength side than 450 nm and / or on the longer wavelength side than 650 nm, which has a low relative visual sensitivity to the naked eye, is shown in Fig. 4 (A). As shown in FIG. 4A, the spectral reflection curve of the dye of the normal printing ink of the same color (green) and the same density as the color material used for the hidden pattern is shown in FIG. 4 (A).
It becomes (b). Here, the relative luminosity curve of the naked eye is as shown in FIG. 4 (B), and the wavelength of 500 to 650 nm feels stronger than the other wavelengths. Therefore, the spectral reflectance curves of the background pattern and the hidden pattern are indicated by 650 to 700 nm. The image forming body of the present invention is perceived by the naked eye as the same green color, because the difference in the reflectance caused is not felt. However, in electrophotographic color copiers and silver salt type color copiers with high color reproducibility, the region (650-700 nm) of the curve (a) showing high reflectance is reproduced as red, so the background pattern The green color is reproduced as a yellowish brown color, and the hidden pattern is reproduced as it is as a green color, and the copy has a difference in color contrast, and the hidden pattern appears and can be visually recognized with 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。<Operation on an electrophotographic color copying machine in which regions near 400 to 450 nm and around 650 nm to 700 nm are cut by a filter or the like so that the color reproducibility with respect to the original is faithful to the naked eye> General color copying machine 4 for yellow, magenta, cyan, and black
Although color toners and ribbons are used, the density of yellow is low, and therefore, when reproducing a standard color rather than other colors, the amount of yellow is larger than that of other colors. For this reason, the standard colors have been set, or the light-colored colors that have a large amount of yellow in copying machines with low resolution have extremely low usage of toner for cyan and magenta colors. Minutes are used normally and are reproduced in yellow, and those composed of small halftone dots are reproduced in yellow or disappear. Therefore, for example, when the image forming body of the present invention printed in a light green color is copied, the background pattern composed of small dots becomes yellow or disappears, and the pattern composed of large dots becomes green. Since it is reproduced or disappeared without being reproduced, the contrast of the color is added and the hidden pattern is visually recognized, or the desired design is lost, so that it is identified as a copy.
【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。Embodiment An embodiment will be described with reference to the drawings. FIG. 1 is an enlarged explanatory view of a hidden pattern (A) and a background pattern (B) formed of circular figures having different sizes according to an embodiment of the present invention. FIG. 2 is a circular figure of different size showing a constitutional unit in which one is solid printed and the other is formed by halftone dots.
FIG. 3 is an explanatory view showing (A), a hidden pattern and a background pattern (B) formed on the support by the above-mentioned constitutional units. See also FIG.
Is an explanatory view (A) in which circular-shaped figures of different sizes in other examples are used as a structural unit of halftone dots, and a hidden pattern and a background pattern (B) formed on a support by the structural unit.
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 provided with the anti-counterfeiting measure by copying according to the present invention is paper, synthetic resin paper, vinyl chloride sheet, PE.
A circular figure randomly drawn on the support (15) such as T
Make (10) and hide this figure as a pixel (11)
(For example, copy, copy, fake or other characters or marks are preferable). If this hidden pattern is positive, there is a negative relationship, and as a background excluding the hidden pattern, the background pattern is the circular figure (10) as above.
Make (12). This circular figure can also use figures of the same size, but it is preferable to randomly scatter figures of different sizes, and to avoid many of the figures from touching adjacent figures. (See Fig. 1). Further, as shown in FIG. 2, one of the constituent units of the figure is formed by solid (T) and the other is formed by halftone dot (S). For example, the hidden pattern (11) or the background pattern
65 lines to the pattern taken out of either one of (12)
Shading is performed using a screen of 15 to 40% (area ratio) with 150 lines to form a pattern structure formed with halftone dots (S), and both patterns are combined and printed with matching hue and color density. . At the time of this printing, it is preferable to use an ink toned in a light hue for both patterns. In the embodiment described above, the unit of one figure is solid (T), but is not limited to this, a line, a broken line,
Alternatively, a combination of a halftone dot and a line is also possible, and can be selected appropriately.
【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。Further, as shown in FIG. 3, large and small circular figures having the same or different sizes as described above are displayed as halftone dots (S).
For example, the hidden pattern (11) is formed with a screen ruling of 65 lines and 20% halftone dot (S), and the background pattern (12) is formed with a screen ruling of 150 line and 20% halftone dot (S). S)
And a halftone dot pattern of 65% 20% halftone dots, which is formed by overlapping and printing 65% 20% halftone dots by changing the screen angle (to prevent the occurrence of moire). The image forming body is composed of (10). The formation of halftone dots at this time is 15% to 40 when the screen has 65 to 150 lines.
It is preferable to combine in the range of%. This is
If you form a hidden pattern and a background pattern with only large and small halftone dots, you can see the divided boundaries of both patterns,
It becomes unclear by changing the screen angle and overlapping.
【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 in a light hue was used, but either the hidden pattern (11) or the background pattern (12) had a low visibility of 450 nm to the naked eye. Shorter wavelength side and / or 650 nm
Coloring material with higher reflectance at longer wavelengths is printed on the support by toning it to green using cobalt blue, and other patterns are the same as the coloring material toninged above green with ordinary 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 composes 2) is not limited to a circular shape, and may be formed by a polygonal figure (not shown) surrounded by a free curve (closed curve) such as letters and stars. 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 body of the present invention, which is provided with the anti-counterfeiting measure by copying, since the boundary between the hidden pattern and the background pattern printing before copying is not known, it is difficult to visually recognize the existence of the hidden pattern, and the hidden pattern is hidden. Even if the main image such as other characters or patterns is given on the pattern or background pattern,
Since both patterns are formed in a light color, the main image is not difficult to see, and when copying, there is an effect that a hidden pattern that proves that it is a copy is revealed with clear contrast, and various printed materials Can be used as a tint block as a background. Further, the image forming body provided with the anti-counterfeiting measure by copying of the present invention 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 is a hidden pattern (A) composed of circular figures having different sizes and a background pattern according to an embodiment of the present invention.
It is an explanatory view showing an enlarged example of (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 is a diagram illustrating a constitutional unit in which one is solid and the other is a halftone dot in one embodiment of the present invention, and a circular figure (A) of different size and the constitutional unit are formed on a support. It is explanatory drawing which shows the hidden pattern and 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. 3 is an explanatory view (A) in which circular figures having different sizes are used as a structural unit of a halftone dot in another embodiment of the present invention, and a hidden pattern and a background pattern formed on the 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 10 ... Circular figure composed of different sizes 11 ... Hidden pattern 12 ... Background pattern 15 ... Support S ... Halftone dot 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。1. In a pattern in which many circular figures having the same size or different sizes are randomly scattered so as not to contact adjacent figures, each of the circular figures is used as a constituent unit. Hidden patterns such as letters and marks and their background patterns are formed on the support with the same color and the same concentration of color material,
An image forming body provided with anti-counterfeiting measures by copying, characterized in that 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 size or different sizes are randomly scattered so as not to contact adjacent figures, each of the circular figures is composed of halftone dots. Hidden patterns such as characters and marks and their background patterns are formed as a unit, and both patterns are formed on a support with a color material having the same color and the same density, and either the hidden pattern or the background pattern is the other. An image forming body provided with a forgery prevention measure by copying, which is larger or smaller than the halftone dot and overlaps the same halftone dot at an angle at which moire does not occur.
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. One of the hidden pattern and the background pattern is selected as a pattern having a low visual acuity of 450 n for naked eyes.
It is formed by using a coloring material having a high reflectance on the shorter wavelength side than m and / or the longer wavelength side than 650 nm, and the other pattern is a coloring material having the same color and the same density as the coloring material forming the one pattern. The image forming body, which is formed on a support and is so designed that each pattern is not individually recognized by the naked eye, and which has been subjected to counterfeit prevention measures by copying according to claim 1 or 2.
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 figure, which is the structural unit, is formed by a polygonal figure surrounded by a free curve (closed curve), according to claim 1, claim 2 or claim 3. An image forming body that has been subjected to the forgery prevention measure by copying as described.
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 true JPH06239078A (en) | 1994-08-30 |
| JP2827786B2 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) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002211103A (en) * | 2001-01-23 | 2002-07-31 | Toppan Printing Co Ltd | Antifalsifying pattern and securities employing thereof |
| 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 |
| KR100541273B1 (en) * | 2003-04-16 | 2006-01-10 | 이종희 | Anti-copying method and system for hard-copy documents |
| US7245401B2 (en) | 2002-09-20 | 2007-07-17 | Fuji Xerox Co., Ltd. | Device and method for recording additional information on printing medium, and image forming apparatus |
| JP2010064476A (en) * | 2008-08-14 | 2010-03-25 | Toppan Printing Co Ltd | Printed matter |
| CN109703227A (en) * | 2019-01-21 | 2019-05-03 | 东莞运城制版有限公司 | It is a kind of to emboss production dark line, latent image and unwind the method for anti-counterfeit that lock integrally combines |
-
1993
- 1993-02-15 JP JP5025229A patent/JP2827786B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002211103A (en) * | 2001-01-23 | 2002-07-31 | Toppan Printing Co Ltd | Antifalsifying pattern and securities employing thereof |
| 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 |
| US7245401B2 (en) | 2002-09-20 | 2007-07-17 | Fuji Xerox Co., Ltd. | Device and method for recording additional information on printing medium, and image forming apparatus |
| KR100541273B1 (en) * | 2003-04-16 | 2006-01-10 | 이종희 | Anti-copying method and system for hard-copy documents |
| JP2010064476A (en) * | 2008-08-14 | 2010-03-25 | Toppan Printing Co Ltd | Printed matter |
| CN109703227A (en) * | 2019-01-21 | 2019-05-03 | 东莞运城制版有限公司 | It is a kind of to emboss production dark line, latent image and unwind the method for anti-counterfeit that lock integrally combines |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2827786B2 (en) | 1998-11-25 |
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