JPS6058711B2 - Image forming body with counterfeit prevention measures - Google Patents
Image forming body with counterfeit prevention measuresInfo
- Publication number
- JPS6058711B2 JPS6058711B2 JP53068066A JP6806678A JPS6058711B2 JP S6058711 B2 JPS6058711 B2 JP S6058711B2 JP 53068066 A JP53068066 A JP 53068066A JP 6806678 A JP6806678 A JP 6806678A JP S6058711 B2 JPS6058711 B2 JP S6058711B2
- Authority
- JP
- Japan
- Prior art keywords
- forming body
- image forming
- pattern
- energy distribution
- spectral energy
- 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
Links
Landscapes
- Credit Cards Or The Like (AREA)
- Printing Methods (AREA)
Description
【発明の詳細な説明】
本発明は色料のメタリズムを応用した画像形成体の偽造
防止方法及び偽造防止策を施した画像形成体に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for preventing counterfeiting of an image-forming body using metallism of a colorant, and an image-forming body provided with anti-counterfeiting measures.
メタリックな色料とは、例えば対象となる色料を２つと
し、それぞれａ、ｂとすると次式に示す３つの等式が満
足されるものである。A metallic colorant is one that satisfies the following three equations, for example, when there are two target colorants and a and b are used, respectively.
（ｐａλ …ｕ）ｘλΔλ＝
（ｐｂλ Ｈｂλ）ｘλΔλ
（ｐａλ 出λ）ｙλΔλ＝
（ｐｂλ Ｈｂλ）ｙλΔλ
（ｐａλ 出λ）ｚλΔλ＝
（ｐｂλ Ｈｂλ）ｚλΔλ
ここで
ｐａλ：色料ａの分光反射率
ｐｂλ：色料をの分光反射率
Ｈａλ：色料ａを照らす光源の分光エネルギー分布袖λ
：色料をを照らす光源の分光エネルギー分布Ｘλ：
ｙλ： スペクトルΞ刺激値
ｚλ ：
すなわち、分光反射率の異なつた色でも照明条件によつ
ては等色になり、又ある照明光源下では等色である色同
士でも分光エネルギー分布の異なつた他の光源下では全
く違つた色に見えてしまう様な現象をメタメリズムと言
い、この様な現象を生じる色料同士をメタメリツクな色
料と言う。(paλ ...u)xλΔλ= (pbλ Hbλ)xλΔλ (paλ output λ)yλΔλ= (pbλ Hbλ)yλΔλ (paλ output λ)zλΔλ= (pbλ Hbλ)zλΔλ where paλ: Spectral reflectance of colorant a pbλ: Color Spectral reflectance Haλ of the colorant A: Spectral energy distribution range λ of the light source that illuminates the colorant a
: Spectral energy distribution of the light source that illuminates the colorant Metamerism is a phenomenon in which certain colors appear completely different under different light sources with different spectral energy distributions, and colorants that cause this phenomenon are called metamerism colorants.
本発明はこの様なメタメリズムの原理を応用したもので
あり、メタメリツクな色料群を用いてパターンを形成し
、照明する光源を適当に選択することにより、該色料群
が同色に見えたり、異なつた色に見えることを利用した
画像形成体の偽造を防止する方法及び偽造防止策を施し
た画像形成体に関するものである。従来、画像形成体の
偽造を防止する目的で各種の試みがなされている。The present invention applies the principle of metamerism, and by forming a pattern using a group of metameric colorants and appropriately selecting a light source for illumination, the group of colorants can be made to look the same color, The present invention relates to a method for preventing counterfeiting of an image forming body by utilizing the appearance of different colors, and an image forming body having anti-counterfeiting measures. Conventionally, various attempts have been made to prevent counterfeiting of image forming bodies.
最も一般的には他に真似のできない様な高級印刷技術を
用いて偽造防止策を施した画像形成体を作つている。例
えばザンメル凸版と呼ばれる印刷法を用いた印刷物があ
る。このジンメル印刷法は数色の異なつつたインキをお
のおのの分色版につけ、弾性体の集合胴（ザンメル胴）
にいつたん転写し、刷版がこれよりインキをうけて紙面
に一度で多色印刷を行なうものである。印刷は各色同時
に行なわれるので、見当精度の狂いのない印刷を行なえ
るものである。しかしこの印刷によつて得られる偽造防
止策を施した印刷物は、製版・印刷原価が割高であるた
め高くつくという欠点を有していた。また特殊な機械彫
刻、手彫刻等により他に真似の出来ない様な製版をなし
、印刷を行なうという偽造防止策を施した印刷物もある
。しかし、この印刷物も製版原価が高価であるという欠
点を有していた。さらに上記ザンメル凸版印刷により得
られた印刷物、及び特殊な機械彫刻、手彫刻等を用いて
製版・印刷を行なつた印刷物に共通した欠点がある。Most commonly, image-forming bodies are manufactured using high-quality printing technology that cannot be imitated anywhere else to prevent counterfeiting. For example, there are printed materials that use a printing method called Sammel letterpress. In this Simmel printing method, several different colors of ink are applied to each color separation plate, and an elastic collecting cylinder (Sammel cylinder) is used.
The printing plate receives the ink from the ink and prints multiple colors on the paper at once. Since printing is performed simultaneously for each color, printing can be performed without any deviation in register accuracy. However, the printed matter obtained by this printing method, which has anti-counterfeiting measures, has the drawback of being expensive due to relatively high plate-making and printing costs. There are also printed materials that are manufactured using special machine engravings, hand engravings, etc., and are printed in a way that cannot be imitated by anyone else to prevent counterfeiting. However, this printed matter also had the drawback of high plate-making costs. Furthermore, there are drawbacks common to printed matter obtained by the above-mentioned Sammel letterpress printing and printed matter produced by plate making and printing using special mechanical engraving, hand engraving, or the like.
すなわち最近の写真技術及び印刷技術の進歩によりこれ
らの印刷物から簡単に複製物が得られてしまい、専門家
でさえも真偽の判定が困難な場合も生じている。さらに
通常印刷物の受授には専門家てはなく一般の人が当たる
ので一般の人でも簡単に偽造物と判定できなければ偽造
物が通用してしまう。従つて上述した方法ては偽造防止
の役目を果たさない事がままある。また小切手等の印刷
物においては、インキ消し等の薬品により色が消えたり
変色したりあるいは−発色したりするインキを用い、偽
造防止策を施しているものもあるが、その変化は非可逆
的であり、一度真偽の検差をしてしまうと、印刷物が使
用出来なくなつてしまうという欠点を有していた。That is, due to recent advances in photography and printing technology, copies of these printed materials can be easily obtained, and even experts have difficulty determining authenticity in some cases. Furthermore, printed matter is usually received by ordinary people rather than experts, so if ordinary people cannot easily identify it as a counterfeit, it will pass. Therefore, the above-mentioned methods often fail to prevent counterfeiting. In addition, some printed materials such as checks use ink that disappears, changes color, or develops color when used with chemicals such as ink erasers to prevent counterfeiting, but the change is irreversible. However, once the authenticity is verified, the printed matter becomes unusable.
本発明は前述した欠点を全て解消できるものである。The present invention can overcome all of the above-mentioned drawbacks.
以下本発明を具体例を参照にして詳細に説明する。The present invention will be described in detail below with reference to specific examples.
我々が通常目にする光源は主に太陽光、螢光！灯、白熱
電球などであるが、その代表的なエネルギー分布を第１
図乃至第３図に、即ち第１図に太陽光の代表的な分光エ
ネルギー分布を、第２図に螢光灯の代表的な分光エネル
ギー分布を、第３図にタングステン電球の分光エネルギ
ー分布をそれ・ぞれ示す。The light sources we usually see are mainly sunlight and fluorescence! lights, incandescent light bulbs, etc., but the typical energy distribution is
Figures 3 to 3 show the typical spectral energy distribution of sunlight in Figure 1, the typical spectral energy distribution of fluorescent lamps in Figure 2, and the spectral energy distribution of tungsten light bulbs in Figure 3. Show each.
この様な通常光源下では同色に見えるが、適当な分光透
過率を有するフィルターを通して見ると異なつた色相及
び／又は明度、及び／又は彩度に見える色料例えばＡ，
Ｂの２点選び、第４図のパターンを色料Ａで第５図のパ
ターンを色料Ｂで印刷すれば、通常光下では第６図の如
く全くパターンが認識できないが、所望のフィルターを
通して見ると第７図の如きパターンを見ることができる
。従つてこのようなパターンを画像形成体の少なくとも
一部に設けておけば、所望のフィルターを通して見ない
と所望のパターンが認識されないので、偽造防止に極め
て効果がある。即ち、偽造者は第６図の如きパターンを
見ても・その仕組がわからないので、第４図と第５図の
パターンを同色で複製してしまう。従つて所望のフィル
ターを通して見た時、何らパターンの変化を生じないの
で、一般の人でも容易に真偽の判定が行なえる。また、
偽造者がもしこの仕組を知つたとしても、どの部分にメ
タリックな色料が使用されているかを見つけ出し、この
色料の分光反射率曲線を測定し、色料名を割り出し、更
に同色の濃度にて複製しなければならないので、偽造は
非常に困難てある。以上、メタリックな色料を２種使用
した例を説明したが、２種以上なら何種類でもよい。Colorants such as A,
If you select two points B and print the pattern in Figure 4 with colorant A and the pattern in Figure 5 with colorant B, the pattern cannot be recognized at all under normal light as shown in Figure 6, but it will print through the desired filter. If you look at it, you can see a pattern like that in Figure 7. Therefore, if such a pattern is provided on at least a portion of the image forming body, the desired pattern will not be recognized unless it is viewed through a desired filter, which is extremely effective in preventing counterfeiting. That is, even if a counterfeiter sees a pattern such as that shown in FIG. 6, he or she does not understand how it works, so he copies the patterns shown in FIGS. 4 and 5 in the same color. Therefore, when viewed through a desired filter, the pattern does not change at all, so even ordinary people can easily determine the authenticity. Also,
Even if a counterfeiter were to know about this mechanism, they would be able to find out where the metallic colorant is used, measure the spectral reflectance curve of this colorant, determine the name of the colorant, and then determine the density of the same color. It is very difficult to counterfeit because it has to be reproduced. An example in which two types of metallic colorants are used has been described above, but any number of types may be used as long as there are two or more types.
また真偽の判定に所望のフィルターを通して画像形成体
を見るとしたが、光源の前にフィルターを置いても、所
望の分光エネルギー分布を持つ光源を用いても良い。こ
こでメタリックな色料は特に限定することはなく、１種
あるいは２種以上の顔料から１つの分光反射率曲線を有
する色を作り、この色とメタリックな分光反射率曲線を
有する別の色料を別の色料から作つてもよい。Further, although the image forming body is viewed through a desired filter to determine authenticity, a filter may be placed in front of the light source, or a light source having a desired spectral energy distribution may be used. Here, the metallic colorant is not particularly limited, and a color having one spectral reflectance curve is made from one or more pigments, and this color and another colorant having a metallic spectral reflectance curve are used. may be made from other colorants.
また画像形成体中のパターンを適宜に選択することによ
り、偽造を防止すると同時に情報を伝えることも可能で
ある。Furthermore, by appropriately selecting the pattern in the image forming body, it is possible to prevent forgery and at the same time convey information.
例えば、くじ引券をメタリックな色料を使用して作成す
れば、真偽の鑑定と同時に何等に当つたかも判定できる
。以上のように本発明においては真偽の鑑定に所望の分
光エネルギー分布を有する光源、あるいは所望の分光透
過率を有するフィルターを用いるだけでよく、非常に手
軽に、安価に一般の人でも簡単にかつ瞬時に真偽の判定
が行なえ、真偽の判定後も何ら画像形成体を損ねること
なく、何回でも繰り返して行なえるものである。For example, if a lottery ticket is made using metallic coloring, it is possible to determine whether it is a lottery ticket at the same time as determining its authenticity. As described above, in the present invention, it is only necessary to use a light source with a desired spectral energy distribution or a filter with a desired spectral transmittance to identify authenticity, making it extremely easy, inexpensive, and easy for ordinary people to identify. Moreover, the authenticity can be determined instantly, and even after the authenticity determination, it can be repeated any number of times without any damage to the image forming body.
以下に実施例を示す。Examples are shown below.
実施例
第８図に示す様な分光反射率曲線を有する淡口コバルト
線にて第４図のパターンを印刷し、次に第９図に示す様
な分光反射率曲線を有するフタロシアニンブルーとベン
ジジンイエローの１重量部：４重量部の混合物にて第５
図のパターンを見当を合わせて印刷した。Example The pattern shown in Figure 4 was printed using a light cobalt wire having a spectral reflectance curve as shown in Figure 8, and then the pattern of phthalocyanine blue and benzidine yellow, which had a spectral reflectance curve as shown in Figure 9, was printed. 5th part in a mixture of 1 part by weight: 4 parts by weight
I aligned the pattern in the figure and printed it.
すると、太陽光、螢光灯、白熱電球等の通常光源下では
第６図の如くパターンはほとんど見えず、第１０図の如
き分光エネルギー分布を有する螢光ランプＦＬ４ＯＳ●
Ｐｋ（（株）東京芝浦電気製）で照らして見ると鮮かに
″ＴＯＰＰＡＮ′５のパターンを現出した。また、この
印刷物を通常光源下で第１１図に示す分光透過率曲線の
如くの特性をもつコダツク ラツテン フィルターＮＯ
３４を通して見ても同様であつた。Then, under normal light sources such as sunlight, fluorescent lamps, incandescent lamps, etc., the pattern is almost invisible as shown in Figure 6, and the fluorescent lamp FL4OS● has a spectral energy distribution as shown in Figure 10.
When viewed under the light of Pk (manufactured by Tokyo Shibaura Electric Co., Ltd.), a ``TOPPAN'5'' pattern was clearly revealed.The spectral transmittance curve shown in Figure 11 of this print under a normal light source clearly appeared. KODATSU CLATTEN FILTER NO.
The same thing happened when I looked at it through 34.
第１図は太陽光の代表的な分光エネルギー分布図、第２
図は螢光灯の代表的な分光エネルギー分布図、第３図は
タングステン電球の分光エネルギー分布図、第４図及び
第５図は画像形成体上に施すパターンの様子を示す説明
図、第６図は第４図及び第５図に示すパターンを施した
画像形成体を通常光下で見た時に認識されるパターンの
一例を示す説明図、第７図は第４図及び第５図のパター
ンを施した画像形成体を所望の分光エネルギー分布を有
する光源下で見た時に認識されるパターンの一例を示す
説明図、第８図は淡口コバルト線の・分光反射率曲線、
第９図はフタロシアニンブルーとベンジジンイエローと
の１重量部：４重量部の混合物の分光反射率曲線、第１
０図は螢光ランプＦＬ４ＯＳ−Ｐｋ（（株）東京芝浦電
気製）の分光エネルギー分布図、第１１図はコダツク
ラツテン フニイルターＮＯ．３４（イーストマンコダ
ツク社製）の分光透過率曲をそれぞれ示す。Figure 1 is a typical spectral energy distribution diagram of sunlight, Figure 2 is a typical spectral energy distribution diagram of sunlight.
The figure is a typical spectral energy distribution diagram of a fluorescent lamp, Figure 3 is a spectral energy distribution diagram of a tungsten light bulb, Figures 4 and 5 are explanatory diagrams showing the state of the pattern formed on the image forming body, and Figure 6 The figure is an explanatory diagram showing an example of the pattern recognized when an image forming body with the patterns shown in FIGS. 4 and 5 is viewed under normal light, and FIG. 7 is the pattern shown in FIGS. 4 and 5. An explanatory diagram showing an example of a pattern recognized when the image-forming body subjected to this process is viewed under a light source having a desired spectral energy distribution.
Figure 9 shows the spectral reflectance curve of a mixture of 1:4 parts by weight of phthalocyanine blue and benzidine yellow.
Figure 0 is a spectral energy distribution diagram of the fluorescent lamp FL4OS-Pk (manufactured by Tokyo Shibaura Electric Co., Ltd.), and Figure 11 is a diagram of the spectral energy distribution of the fluorescent lamp FL4OS-Pk (manufactured by Tokyo Shibaura Electric Co., Ltd.).
Ratten Funilter No. The spectral transmittance curves of No. 34 (manufactured by Eastman Kodak Co.) are shown.
Claims (1)
色に見えるが、所望の分光エネルギー分布を有する光源
のもとで見るか、所望のフィルターを通して見るか、あ
るいは所望のフィルターを通過させた光のもとで見ると
一方が異なつた色相に見えるメタリックな性質を有する
二種類の色料のそれぞれによつてパターンを互いに対比
観察できるように基材上に形成することに特徴を有する
偽造防止策を施した画像形成体。1. They appear to be the same color under normal light from sunlight, fluorescent lights, incandescent bulbs, etc., but they can be viewed under a light source with a desired spectral energy distribution, or through a desired filter, or when viewed under a desired filter. A forgery characterized by forming patterns on a base material using two types of colorants that have metallic properties, one of which appears to have a different hue when viewed under different light, so that patterns can be observed in contrast to each other. Image forming body with preventive measures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53068066A JPS6058711B2 (en) | 1978-06-06 | 1978-06-06 | Image forming body with counterfeit prevention measures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP53068066A JPS6058711B2 (en) | 1978-06-06 | 1978-06-06 | Image forming body with counterfeit prevention measures |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54159004A JPS54159004A (en) | 1979-12-15 |
| JPS6058711B2 true JPS6058711B2 (en) | 1985-12-21 |
Family
ID=13363023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP53068066A Expired JPS6058711B2 (en) | 1978-06-06 | 1978-06-06 | Image forming body with counterfeit prevention measures |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6058711B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001279140A (en) * | 2000-03-30 | 2001-10-10 | Printing Bureau Ministry Of Finance | Printed matter for preventing counterfeit |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0211183Y2 (en) * | 1980-08-22 | 1990-03-20 | ||
| JPS5884277U (en) * | 1981-12-02 | 1983-06-07 | 凸版印刷株式会社 | Copy slip |
| JPS58159059U (en) * | 1982-04-20 | 1983-10-24 | 凸版印刷株式会社 | Verification device |
| JPH03212790A (en) * | 1990-01-18 | 1991-09-18 | Puripeidokaade Syst Kk | Card validity checking system |
| JP2000078387A (en) * | 1998-08-28 | 2000-03-14 | Fuji Photo Film Co Ltd | Printing method and device, pattern read method and device and recording medium |
| US7379588B2 (en) * | 2003-11-25 | 2008-05-27 | Xerox Corporation | Systems for spectral multiplexing of source images to provide a composite image, for rendering the composite image, and for spectral demultiplexing the composite image to obtain a normalized color image |
| JP4649613B2 (en) * | 2005-12-07 | 2011-03-16 | 独立行政法人 国立印刷局 | True / false discrimination printed matter |
| US8277908B2 (en) * | 2006-05-11 | 2012-10-02 | Xerox Corporation | Substrate fluorescence mask for embedding information in printed documents |
| JP5641827B2 (en) * | 2010-08-30 | 2014-12-17 | キヤノン株式会社 | Image processing apparatus, image processing method, and program |
| JP5915833B2 (en) * | 2011-08-23 | 2016-05-11 | 大日本印刷株式会社 | Color variable printed matter |
| JP2015048412A (en) * | 2013-09-02 | 2015-03-16 | 独立行政法人 国立印刷局 | Ink having function of preventing falsification and copying and forgery prevention print using the same |
| JP2015048413A (en) * | 2013-09-02 | 2015-03-16 | 独立行政法人 国立印刷局 | Ink having function of preventing falsification and copying and forgery prevention print using the same |
-
1978
- 1978-06-06 JP JP53068066A patent/JPS6058711B2/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001279140A (en) * | 2000-03-30 | 2001-10-10 | Printing Bureau Ministry Of Finance | Printed matter for preventing counterfeit |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54159004A (en) | 1979-12-15 |
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