JP3673971B2

JP3673971B2 - Anti-counterfeit printed matter

Info

Publication number: JP3673971B2
Application number: JP2002227352A
Authority: JP
Inventors: 智一金子
Original assignee: 独立行政法人国立印刷局
Priority date: 2002-08-05
Filing date: 2002-08-05
Publication date: 2005-07-20
Anticipated expiration: 2022-08-05
Also published as: JP2004066580A

Description

【０００１】
【発明の属する技術分野】
本発明は、ＩＤカード、通行証、登録証、入場券、出入国証などの身分、権利、資格などを証明する証書類及び株券、債権、商品券、銀行券などの有価証券類に適用される特殊形状の凸状画線を用いて潜像効果のある偽造防止印刷物に関するものである。
【０００２】
【従来の技術】
銀行券、株券、債権、商品券等の有価証券類、ＩＤカード、出入国証、登録証等の証書類及び重要書類等の印刷物などにおいて、従来からこれらの偽造、変造及び複製を防止するための方法として、凹版印刷された３次元的模様要素の均一なディメンションを有する像配列と、バックグランド配列の一方が他方のディメンションとは異なることによりマークが現われ又は消えるように構成された書類や、像配列とバックグランド配列における線の向きが異なることによりマークが現われ又は消えるように構成された書類や、要素がドットであり一方の配列の要素間に他方の配列があることによりマークが現われ又は消えるように構成された書類が開示されている（特公昭５６−１９２７３号公報参照）。
【０００３】
また、二つの高さを有する平行な盛り上がったセグメントの線からなる群が交互に二つの所定の異なった方向に延在し、高い方の盛り上がりセグメントによって隠し画像が形成され低い方のセグメントにより図柄の背景を形成する背景と少なくとも二つの隠し画像を有する有価証券が開示されている（特開昭６０−１５５４９２号公報参照）。
【０００４】
更に、インキを適宜の高さに盛って成る線と、インキを低く盛って成る低線により模様を構成すると共に、適宜の図柄に対応させて低線を設けている偽造防止印刷物が開示されている（特開昭５５−１１７６８９号公報参照）。
【０００５】
更に、互いに平行に微細な溝条と突条とを交互に多数本刻設したマーク形成部を有したカードにおいて突条の一部を他の部分に対して盛り上げて形成することによりマークを画成したカードが開示されている（実開平２−１２７４７８号公報参照）。
【０００６】
上記した従来からの技術を用いて得られた書類、有価証券、偽造防止印刷物、カードなどは、配列や群の画線の高さの差により又は画線の一部を高くすることにより或いは配列や群の画線の向きを異ならせることによりマーク等の隠し画像を形成したものである。これらの従来からの技術は、マーク等の隠し画像を表示する画線とその他の部分を表示する画線との画線の高さのわずかな違いを利用して隠し画像を視認するものであるため、マーク等の隠し画像は視認できる範囲が極めて小さくかつ分かりにくいという欠点があった。
【０００７】
また、前記配列や群の画線の向きを異ならせることによりマーク等の隠し画像を形成するものは、マーク等の隠し画像を形成する部分が周辺のマーク等の隠し画像を形成しない部分に比べ不自然に目立ってしまうという欠点があり、デザインが制約されてしまうという問題があった。更に、マーク等の隠し画像を形成する部分が周辺のマーク等の隠し画像を形成しない部分に比べ不自然にならないように配列や群の画線の向きを構成するとマーク等の隠し画像は視認できる範囲が極めて小さくかつ分かりにくくなってしまうという欠点があった。
【０００８】
また、これらのマーク等の隠し画像を形成するための画線は、印刷分野で一般的に行われている腐食法で作製した凹版版面を用いて印刷することにより或いは金属加工において一般的に行われている腐食法で作製した版を用いてホットスタンプすることにより容易に得ることができる。このため、悪意で銀行券、株券、債権、商品券等の有価証券類、出入国証、登録証等の証書類及び重要書類等の印刷物又はＩＤカード類などを偽造或いは変造しようとする者が、容易にこれを真似することができるという難点があった。
【０００９】
【発明が解決しようとする課題】
以上のことから、本発明は前述した問題点を解決することを目的としたもので、偽造或いは変造に対して、より効果が高くしかも容易に真似することのできない技術の開発及び複写機により複写されない画線の開発として、従来の凹版画線のインキの盛による優れた指感性や真偽判別効果だけではなく、凹版画線が立体である特徴を活かし、一本一本の画線形状を三次元的に複雑化することが望まれてきている。
【００１０】
本発明は上記の問題点を鑑みてなされたもので、基材上に、複数の凸状画線の構成によって画像を形成した偽造防止印刷物において、複数の凸状画線は、凸状画線の底部にあたるインキ転移部の幅方向の画線幅が一定で、凸状画線は高さ方向のインキの盛りが高くなるに伴い、幅方向の画線幅が狭くなり、長さ方向の画線形状は波状に変化する凸状画線で構成することによって、複製され難く、複写防止効果のある印刷物になり得ることを見出した。
【００１１】
また、上記凸状画線の画線構成によって、背景画像部とメッセージ画像部を作製して、背景画像部の波状に変化する凸状画線とメッセージ画像部の波状に変化する凸状画線を、周期、振幅、位相、及び凸状画線の凸表面の幅方向の画線幅の少なくとも一つ以上が異なって構成することで、特定の方向からメッセージ画像を視認することができ、複製され難く、複写機では複写することができない印刷物になり得ることを見出した。本発明は上記記載の偽造防止印刷物を提供するものである。
【００１２】
【課題を解決するための手段】
本発明は、基材上に、複数の凸状画線の構成によって画像を形成した偽造防止印刷物において、前記画像は、背景画像部とメッセージ画像部に区分けされ、前記背景画像部と前記メッセージ画像部は複数の凸状画線で同一方向に構成され、前記背景画像部の凸状画線と前記メッセージ画像部の凸状画線の底部にあたるインキ転移部の幅方向の画線幅が一定で、凸状画線の高さ方向のインキの盛りが高くなるに伴い、幅方向の画線幅が狭くなり、長さ方向の形状は波状に変化する凸状画線で構成され、且つ、前記背景画像部の波状に変化する凸状画線と前記メッセージ画像部の波状に変化する凸状画線は、周期、振幅、位相、及び凸状画線の凸表面の幅方向の画線幅の少なくとも一つ以上が異なるように構成されたことを特徴とする偽造防止印刷物である。
【００１３】
また、背景画像部と前記メッセージ画像部の波状に変化する凸状画線は、同一画線上において周期、振幅、位相、及び凸状画線の凸表面の幅方向の画線幅の少なくとも一つ以上が異なるように構成されたことを特徴とする偽造防止印刷物である。
【００１４】
また、本発明は、前記凸状画線の底部にあたるインキ転移部の幅方向の画線幅が１０μｍ以上から６００μｍ以下で、前記凸状の画線の高さが５μｍ以上から３００μｍ以下であることを特徴とした偽造防止印刷物である。
【００１５】
【発明の実施の形態】
以下に、本発明に係る偽造防止印刷物について図面を用いて説明する。また、本発明に係る偽造防止印刷物は、本実施の形態に限定されるものではなく、本発明の係る特許請求の範囲に記載した技術事項の範囲内であれば、各種の態様を採用することができる。
【００１６】
図面によって本発明の偽造防止印刷物に用いる画線の一例を説明する。図１（ａ）は、基材（１）の上に本発明の凸状画線（２）を形成させた、印刷物Ｆである。図１（ｂ）は図１（ａ）の印刷物Ｆに対して垂直方向から見た一部拡大図を示す。図１（ｂ）に示すように凸状画線（２）は、凸状画線の底部にあたるインキ転移部の幅方向の画線幅（３）が一定で、凸状画線（２）は高さ方向（５）のインキの盛りが高くなるに伴い、幅方向の画線幅（３’）が狭くなり、長さ方向の画線形状は波状（６）に変化し、その断面形状（７）が台形を有している凸状画線（２）で構成される。
【００１７】
図２に本発明の凸状画線の形状についてその他の例を示す。図２（ａ）は、一定の画線高さＥの凸状画線（２）であり、インキ転移部である底部の画線幅Ａと上端部の画線幅Ｂがある特定の値をもち、長さ方向に波状に変化し、画線の上端部と底部をつなぐ側面部分（８）は、連続的な膨らんだ曲面を有し、凸状画線（２）の断面形状（７）は図（ａ）に示すように膨らんだ四角形状の場合の画線形状である。
【００１８】
図２（ｂ）は、一定の画線高さＥの凸状画線（２）であり、インキ転移部である底部の画線幅Ａと上端部の画線幅Ｂがある特定の値をもち、長さ方向に波状に変化し、画線の上端部と底部をつなぐ側面部分（８）は、連続的な凹んだ曲面を有し、凸状画線（２）の断面形状（７）は図（ｂ）に示すように凹んだ四角形状の場合の画線形状である。
【００１９】
図２（ｃ）は、一定の画線高さＥの凸状画線（２）であり、インキ転移部である底部の画線幅Ａと上端部の画線幅Ｂがある特定の値をもち、長さ方向に波状に変化し、画線の上端部と底部をつなぐ側面部分（８）は、連続的な直線を有し、上端部の画線幅がなく、凸状画線（２）の断面形状（７）が図（ｃ）に示すように三角形状の場合の画線形状である。
【００２０】
図２（ｄ）は、一定の画線高さＥの凸状画線（２）であり、インキ転移部である底部の画線幅Ａと上端部の画線幅Ｂがある特定の値をもち、長さ方向に波状に変化し、画線の上端部と底部をつなぐ側面部分（８）は、連続的な膨らんだ曲面を有し、上端部の画線幅がなく、凸状画線（２）の断面形状（７）に図（ｄ）に示すように膨らんだ三角形状の場合の画線形状である。
【００２１】
図２（ｅ）は、一定の画線高さＥの凸状画線（２）であり、インキ転移部である底部の画線幅Ａと上端部の画線幅Ｂがある特定の値をもち、長さ方向に波状に変化し、画線の上端部と底部をつなぐ側面部分（８）は、連続的な凹んだ曲面を有し、凸状画線（２）の断面形状（７）は図（ｅ）に示すように凹んだ三角形の場合の画線形状である。
【００２２】
また、図１（ａ、ｂ）及び図２（ａ、ｂ、ｃ、ｄ、ｅ）の凸状画線（２）において、本発明の凸状画線（２）の凸表面の幅方向の画線幅Ｂの１/２の幅とその振幅、位相Ｃを加えた値が、凹版画線形状の都合上、画線の底部の幅Ａと同じかそれよりも小さくする必要がある。本発明の凸状画線の凸表面の幅方向の画線幅Ｂの１/２の幅とその振幅、位相Ｃを加えた値が、凹版画線形状の都合上、画線の底部の幅Ａより大きいと、インキ転移に支障が生じ、階調の優れた潜像模様が出現しにくくなり、本発明の効果を奏することができなくなる。
【００２３】
図１（ａ、ｂ）、図２（ａ、ｂ、ｃ、ｄ、ｅ）で説明した凸状画線を用いて、複数の凸状画線の構成によって画像を形成した偽造防止印刷物を図３に示す。
【００２４】
図３（ａ）に示す偽造防止印刷物は、背景画像部（９）とメッセージ画像部（１０）に区分けし、背景画像部（９）とメッセージ画像部（１０）は複数の凸状画線で構成し、背景画像部の凸状画線と前記メッセージ画像部の凸状画線は、凸状画線の底部にあたるインキ転移部の幅方向の画線幅が一定で、凸状画線は高さ方向のインキの盛りが高くなるに伴い、幅方向の画線幅が狭くなり、長さ方向の画線形状は波状に変化する凸状画線で構成される。また、背景画像部の波状に変化する凸状画線とメッセージ画像部の波状に変化する凸状画線は、周期、振幅、位相、及び凸状画線の凸表面の幅方向の画線幅の少なくとも一つ以上が異なるように構成する必要がある。図３（ｂ）に図３（ａ）の一部拡大図を示す。
【００２５】
凸状画線の形状は限定されることなく、図１（ｂ）及び図２（ａ、ｂ、ｃ、ｄ、ｅ）の何れか一つの凸状画線を選択又は組合せて作製することができる。また、凸状画線の長さ方向に伴う波状の形状は、周期、振幅、位相、及び凸状画線の凸表面の幅方向の画線幅の少なくとも一つ以上が連続的及び／又は段階的に変化させて作成しても良い。
【００２６】
上記記載の背景画像部の波状に変化する凸状画線と前記メッセージ画像部の波状に変化する凸状画線は、周期、振幅、位相、及び凸状画線の凸表面の幅方向の画線幅の少なくとも一つ以上が異なることを説明する図として、画線に対して垂直方向から見た場合の図を図４に示す。
【００２７】
図４（ａ）は本発明の凸状画線（２）において、波状に変化する凸状画線上端部の周期DをD’に変化させた本発明の凸状画線(１１)を示すものである。また、図４（ｂ）は本発明の凸状画線（２）において、波状に変化する凸状画線上端部の振幅CをC’に変化させた本発明の凸状画線(１２)を示すものである。また、図４（ｃ）は本発明の凸状画線（２）において、波状に変化する凸状画線上端部の位相をＨの距離だけ変化させた本発明の凸状画線(１３)を示すものである。また、図４（ｄ）において、波状に変化する凸状画線の凸表面の幅方向の画線幅が狭い凸状画線（２）に対し、凸状画線の凸表面の幅方向の画線幅Bをある特定の値だけ有するよう変形させた凸状画線(１４)を示すものである。
【００２８】
図３で示した印刷物に対して垂直方向から観察した場合を図５に示す。印刷物を垂直方向から観察した場合、背景画像部の凸状画線とメッセージ画像部の凸状画線の底部にあたるインキ転移部の幅方向が一定であるため、メッセージ画像部は確認することができない状態又は確認しにくい状態となる。
【００２９】
図３で示した印刷物に対して斜めから観察した場合を図６に示す。背景画像部の波状に変化する凸状画線とメッセージ画像部の波状に変化する凸状画線は、周期、振幅、位相、及び凸状画線の凸表面の幅方向の画線幅の少なくとも一つ以上が異なって構成しているため、画線の上端部と底部をつなぐ側面部分において、当たった光が多く反射する部分が明るく見え、当たった光が少なく反射する部分は暗く見えるという光の反射状態のパターンに変化が生じ、背景画像部とメッセージ画像部に明度差が生じて潜像が発現する。また、背景画像部とメッセージ画像部において、凸状画線の凸表面の幅方向の画線幅、振幅、位相、周期を連続的に変化させることによって、画線の光の反射状態を制御し、観察者の目に入る光の反射パターンに連続的な差異を生じさせることで、より階調の優れた潜像模様が作製可能である。
【００３０】
本発明の凹版画線のインキの盛の高さは、印刷品質上問題がなければ特に限定されるわけではないが、印刷物の品質等から判断すると、底部にあたるインキ転移部の幅方向の画線幅が１０μｍ以上から６００μｍ以下で、前記凸状の画線の高さが５μｍ以上で３００μｍ以下であることが好ましい。
【００３１】
底部にあたるインキ転移部の幅方向の画線幅が１０μｍ以下、もしくは６００μｍ以上である場合、また、画線の高さが５μｍ以下、もしくは３００μｍ以上では、本発明の凹版版面の作製が困難といえる。
【００３２】
本発明の偽造防止印刷物の作製に用いる版面は、凹版版面を用いる必要があり、従来から印刷分野で一般的に行われているいわゆる腐食法で作製した凹版版面等では、連続する凸状の画線の一部の断面形状を周期的に変えることができないので困難である。また、ＮＣ彫刻機（数値制御彫刻機あるいは数値制御工作機）による画線の作製方法においても、彫刻バイトが版面材料へ直接接触し凹版画線の形状となる溝を加工するため、断面の形状がバイトの形状に大きく依存する。このため、画線の断面形状を変えるごとに、バイトの形状もその都度違うものに交換して加工しなければならず、バイト自体を作製するコストもかかってしまう。そのため、非接触で加工の自由度の高いレーザー加工機により作製するのが好ましい。
【００３３】
本発明の偽造防止印刷物の作製に用いる印刷方式は凹版印刷方式である。
【００３４】
本発明の偽造防止印刷物に用いる基材は、紙、プラスチック等、特に限定されるものではない。
【００３５】
本発明の偽造防止印刷物に用いる凹版インキは特に限定されないが、電子線硬化型、紫外線硬化型、酸化重合型、紫外線硬化型と酸化重合型の併用型等のインキが好ましい。
【００３６】
【実施例】
以下、実施例を用いて本発明を更に詳細に説明するが、本発明の内容は、これらの実施例の範囲に限定されるものではない。
【００３７】
（実施例１）
図７(a)は、凹版版面を用いて、塗工紙及び黒色上質紙に、透明な紫外線乾燥型の凹版インキによる凹版印刷を行い、紫外線によりインキ皮膜を硬化し、画線幅５００μｍ、画線高さ５０μｍ、凸状画線の凸表面の幅方向の画線幅をもたない、断面形状が三角形の形をした画線群を、３００μｍの間隔で作製した印刷物Ｇの画線構成の概観図である。
【００３８】
図７(b)は、印刷物Ｇの一部を拡大した図である。上端部の振幅、位相を２００μｍと一定とし、メッセージ画像部（１０）の上端部の一周期が２mm、背景画像部（９）の上端部の一周期が１２mmの２種類の画線で構成されている。
【００３９】
図８は、実際の印刷物に対して垂直方向から観察した場合であるが、画線の形状に起因する潜像発現が起こらないため、単なる万線模様として視認される。次に、この印刷物を斜めから観察した場合、図９に示すように画線表面に当たった光が多く反射する部分が明るく見え、当たった光が少なく反射する部分は暗く見えるという明暗のパターンに変化が生じ、メッセージ画像部と背景画像部とでは観察者の目に入る光の反射状態に連続的な差異が生じるため、メッセージ画像部である潜像画像「Ａ」の文字を確認することができた。
【００４０】
本実施例１の印刷物をカラー複写機（ＣＬＣ９００、キャノン社製）により複写すると、全く複写することができず、複写防止画像として有効であることが確認された。
【００４１】
（実施例２）
実施例１で使用した版を用いて、塗工紙及び黒色上質紙に、青色及び褐色の紫外線乾燥型の凹版インキによる凹版印刷を行い、紫外線によりインキ皮膜を硬化し、実施例１と同様に画線幅５００μｍ、画線高さ５０μｍの断面形状が三角形の形をした複数の連続する凸状の画線を３００μｍの間隔で作製した。
【００４２】
青色及び褐色の紫外線乾燥型の凹版インキの連続する凸状の画線の表面状態は、インキ中の顔料により多少の凹凸が確認できた。しかし、インキの色によらず透明な紫外線乾燥型の凹版インキと同様に光沢があり、本実施例の、特定の方向のみから視認することができる画像は、実施例１と全く同様にアルファベットの「Ａ」を確認することができた。
【００４３】
本実施例２の印刷物をカラー複写機（ＣＬＣ９００、キャノン社製）により複写すると、全く複写することができず、複写防止画像として有効であることが確認された。
【００４４】
【発明の効果】
本発明の偽造防止印刷物の画線は複雑化された三次元形状を有しているため容易に複製することができない。凹版画線のインキの盛による優れた指感性や真偽判別効果だけではなく、特定の方向のみから視認することができる画像及び複写防止画像は、視認できる範囲が極めて広く、デザインの制約も少なく、複写機で複写することができないため、身分、権利及び資格などを証明する証書類及び有価証券類の偽造、変造及び複写防止を図ることができる。
【００４５】
【図面の簡単な説明】
【図１】本発明の凸状画線の構成例及び断面図を示す図である。
【図２】本発明の凸状画線の構成例及び断面図を示す図である。
【図３】本発明の印刷物の画線構成の概観図及び一部拡大図を示す図である。
【図４】本発明の凸状画線の周期、振幅、位相、及び凸状画線の凸表面の幅方向の画線幅の異なる形状を示す図である。
【図５】本発明の印刷物に対して垂直方向から観察した場合を示す図である。
【図６】本発明の印刷物を斜めから観察した場合を示す図である。
【図７】実施例１の印刷物の画線構成の概観図及び一部拡大図を示す図である。
【図８】実施例１の印刷物に対して垂直方向から観察した場合を示す図である。
【図９】実施例１の印刷物を斜めから観察した場合を示す図である。
【符号の説明】
１基材
２凸状画線
３画線底部であるインキ転移部の幅方向の画線幅
３’ 画線上端部の幅方向の画線幅
５高さ方向
６波状
７凸状画線の断面形状
８画線上端部と底部をつなぐ側面部分
９背景画像部
１０メッセージ画像部
１１波状に変形した画線上端部の周期が変化した画線
１２波状に変形した画線上端部の振幅が変化した画線
１３波状に変形した画線上端部の位相が変化した画線
１４波状に変形した画線上端部の幅方向の画線幅が変化した画線
Ａ画線下底部の幅
Ｂ画線上底部の幅
Ｃ、Ｃ’ 画線上端部の振幅
Ｄ、Ｄ’ 画線上端部の周期
Ｅ画線高さ
Ｆ、Ｇ印刷物
Ｈ位相のずれ[0001]
BACKGROUND OF THE INVENTION
The present invention applies to ID cards, passports, registration certificates, admission tickets, immigration cards, etc., and certificate documents certifying their identity, rights, qualifications, etc. and securities such as stock certificates, bonds, gift certificates, banknotes, etc. The present invention relates to an anti-counterfeit printed matter having a latent image effect using a convex image line having a shape.
[0002]
[Prior art]
To prevent counterfeiting, alteration and copying of banknotes, stock certificates, claims, securities such as gift certificates, ID cards, immigration cards, registration documents, etc. and printed materials such as important documents. As a method, an image array having a uniform dimension of an intaglio-printed three-dimensional pattern element, and a document or image configured such that a mark appears or disappears when one of the background arrays is different from the other dimension. Documents configured so that marks appear or disappear when the direction of the lines in the array and the background array are different, or marks appear or disappear when the element is a dot and the other array is between elements of one array Documents configured as described above are disclosed (see Japanese Patent Publication No. 56-19273).
[0003]
In addition, a group of parallel raised segment lines having two heights alternately extend in two predetermined different directions, a hidden image is formed by the higher raised segment, and the pattern is formed by the lower segment. A securities having a background and at least two hidden images are disclosed (see Japanese Patent Application Laid-Open No. 60-155492).
[0004]
Furthermore, a forgery-preventing printed matter is disclosed in which a pattern is constituted by a line formed with ink at an appropriate height and a low line formed with ink at a low height, and a low line is provided corresponding to an appropriate pattern. (See Japanese Patent Application Laid-Open No. 55-117689).
[0005]
Further, in a card having a mark forming portion in which a large number of fine grooves and protrusions are alternately formed in parallel with each other, a mark is defined by raising a part of the protrusion with respect to the other portion. A formed card is disclosed (see Japanese Utility Model Laid-Open No. 2-127478).
[0006]
Documents, securities, anti-counterfeit printed matter, cards, etc. obtained using the above-mentioned conventional techniques are arranged by increasing the height of a part of the line or by arranging the lines or the height of the line. And a hidden image such as a mark is formed by changing the direction of the image lines of the group. These conventional techniques are for visually recognizing a hidden image by using a slight difference in the height of an image line for displaying a hidden image such as a mark and an image line for displaying other portions. Therefore, the hidden image such as a mark has a drawback that the visible range is extremely small and difficult to understand.
[0007]
In addition, the one that forms a hidden image such as a mark by changing the orientation of the lines of the array or group is different from the portion that forms a hidden image such as a mark in a portion that does not form a hidden image such as a surrounding mark. There is a drawback that it stands out unnaturally, and there is a problem that the design is restricted. Furthermore, if the arrangement or orientation of the lines of the group is configured so that the portion where the hidden image such as the mark is formed does not become unnatural compared to the portion where the hidden image such as the surrounding mark is not formed, the hidden image such as the mark can be visually recognized. There was a drawback that the range was very small and difficult to understand.
[0008]
In addition, the image lines for forming a hidden image such as these marks are generally performed by printing using an intaglio plate produced by a corrosion method generally used in the printing field, or in metal processing. It can be easily obtained by hot stamping using a plate produced by a conventional corrosion method. Therefore, a person who intends to counterfeit or alter banknotes, stock certificates, claims, securities such as gift certificates, immigration cards, registration documents, etc. and printed materials such as important documents or ID cards, etc. There was the difficulty that this could be imitated easily.
[0009]
[Problems to be solved by the invention]
In view of the above, the present invention aims to solve the above-mentioned problems, and has been developed with a technology that is more effective against counterfeiting or alteration and cannot be easily imitated, and copying by a copying machine. As a development of unrecognized image lines, not only the superior finger sensitivity and authenticity discrimination effect by the ink printing of the conventional intaglio image lines, but also the characteristics of the intaglio image lines are three-dimensional, making each line shape It has been desired to increase the complexity in three dimensions.
[0010]
The present invention has been made in view of the above problems, and in a forgery-proof printed matter in which an image is formed on a base material by a configuration of a plurality of convex image lines, the plurality of convex image lines are convex image lines. The line width in the width direction of the ink transfer portion, which is the bottom of the ink, is constant, and as the height of the ink in the height direction increases, the line width in the width direction becomes narrower and the image in the length direction decreases. It has been found that by forming the line shape with a convex image line that changes in a wave shape, it is difficult to be duplicated, and a printed matter having an effect of preventing copying can be obtained.
[0011]
In addition, the background image portion and the message image portion are produced by the above-described image configuration of the convex image line, and the convex image line that changes to the wavy shape of the background image portion and the convex image line that changes to the wavy shape of the message image portion. Is configured such that at least one of the period, amplitude, phase, and line width in the width direction of the convex surface of the convex line is different, so that the message image can be viewed from a specific direction and reproduced. However, it has been found that the printed material cannot be copied by a copying machine. The present invention provides the anti-counterfeit printed matter described above.
[0012]
[Means for Solving the Problems]
The present invention relates to a forgery-preventing printed matter in which an image is formed on a base material by a configuration of a plurality of convex lines, and the image is divided into a background image portion and a message image portion, and the background image portion and the message image The portion is composed of a plurality of convex lines in the same direction, and the line width in the width direction of the ink transfer section corresponding to the bottom of the convex line of the background image portion and the convex line of the message image portion is constant. In addition, as the height of the ink in the height direction of the convex image line increases, the image line width in the width direction becomes narrower, and the shape in the length direction is composed of a convex image line that changes in a wavy shape, and The convex image line that changes in a wavy shape in the background image portion and the convex image line that changes in a wavy shape in the message image portion have a period, an amplitude, a phase, and a line width in the width direction of the convex surface of the convex image line. Anti-counterfeiting seal characterized in that at least one or more are configured differently Thing is.
[0013]
Further, the convex image line that changes in a wavy shape in the background image portion and the message image portion is at least one of the period, amplitude, phase, and the line width in the width direction of the convex surface of the convex image line on the same image line. This is a forgery-preventing printed matter characterized in that the above is different.
[0014]
Further, in the present invention, the width of the ink transfer part corresponding to the bottom of the convex image line is 10 μm or more to 600 μm or less, and the height of the convex image line is 5 μm or more to 300 μm or less. Is a forgery-proof printed matter characterized by
[0015]
DETAILED DESCRIPTION OF THE INVENTION
Below, the forgery prevention printed matter which concerns on this invention is demonstrated using drawing. Further, the forgery-preventing printed matter according to the present invention is not limited to the present embodiment, and various forms are adopted within the scope of the technical matters described in the claims of the present invention. Can do.
[0016]
An example of the image line used for the forgery prevention printed matter of the present invention will be described with reference to the drawings. Fig.1 (a) is the printed matter F which formed the convex image line (2) of this invention on the base material (1). FIG.1 (b) shows the partially expanded view seen from the perpendicular direction with respect to the printed matter F of Fig.1 (a). As shown in FIG. 1B, the convex line (2) has a constant line width (3) in the width direction of the ink transfer portion corresponding to the bottom of the convex line, and the convex line (2) As the height of the ink in the height direction (5) is increased, the line width (3 ′) in the width direction is narrowed, and the line shape in the length direction is changed to a wave shape (6). 7) is composed of a convex image line (2) having a trapezoidal shape.
[0017]
FIG. 2 shows another example of the shape of the convex image line of the present invention. FIG. 2 (a) is a convex image line (2) having a constant image height E, and has a specific value with a line width A at the bottom and an image width B at the upper end, which are ink transfer portions. The side surface portion (8) that changes in a wave shape in the length direction and connects the upper end portion and the bottom portion of the image line has a continuous bulging curved surface, and the cross-sectional shape (7) of the convex image line (2). Is an image line shape in the case of a swelled quadrangular shape as shown in FIG.
[0018]
FIG. 2 (b) is a convex image line (2) having a constant image height E, and has a specific value with the image line width A at the bottom as the ink transfer portion and the image width B at the upper edge. Also, the side surface portion (8) which changes in a wave shape in the length direction and connects the upper end portion and the bottom portion of the image line has a continuous concave curved surface, and the cross-sectional shape (7) of the convex image line (2). Is a drawing line shape in the case of a concave quadrangular shape as shown in FIG.
[0019]
FIG. 2 (c) is a convex image line (2) having a constant image height E, and has a specific value with a line width A at the bottom and an image width B at the upper end, which are ink transfer portions. The side portion (8) that changes in a wave shape in the length direction and connects the upper end portion and the bottom portion of the image line has a continuous straight line, has no image line width at the upper end portion, and has a convex image line (2 ) Is a line shape when the cross-sectional shape (7) is triangular as shown in FIG.
[0020]
FIG. 2 (d) is a convex image line (2) having a constant image height E, and has a specific value with a line width A at the bottom and an image width B at the upper end, which are ink transfer portions. In addition, the side surface portion (8) that changes in a wave shape in the length direction and connects the upper end portion and the bottom portion of the image line has a continuous swollen curved surface, has no image line width at the upper end portion, and is a convex image line. The cross-sectional shape (7) of (2) is an image line shape in the case of a swelled triangular shape as shown in FIG.
[0021]
FIG. 2 (e) is a convex image line (2) having a constant image height E, and has a specific value with a line width A at the bottom and an image width B at the upper end, which are ink transfer portions. Also, the side surface portion (8) which changes in a wave shape in the length direction and connects the upper end portion and the bottom portion of the image line has a continuous concave curved surface, and the cross-sectional shape (7) of the convex image line (2). Is an image line shape in the case of a recessed triangle as shown in FIG.
[0022]
Moreover, in the convex image line (2) of FIG. 1 (a, b) and FIG. 2 (a, b, c, d, e), it is the width direction of the convex surface of the convex image line (2) of this invention. The value obtained by adding 1/2 the width of the image line width B, its amplitude, and the phase C needs to be the same as or smaller than the width A of the bottom of the image line for the convenience of the intaglio image line shape. For the convenience of the intaglio image line shape, the width of the bottom of the image line is a value obtained by adding 1/2 the width of the image line width B in the width direction of the convex surface of the convex image line according to the present invention and its amplitude and phase C. If it is larger than A, ink transfer will be hindered, and a latent image pattern with excellent gradation will hardly appear, and the effect of the present invention cannot be achieved.
[0023]
A forgery-preventing printed matter in which an image is formed by a configuration of a plurality of convex image lines using the convex image lines described in FIGS. 1 (a, b) and 2 (a, b, c, d, e). 3 shows.
[0024]
The anti-counterfeit printed matter shown in FIG. 3A is divided into a background image portion (9) and a message image portion (10), and the background image portion (9) and the message image portion (10) are a plurality of convex image lines. The convex image line of the background image part and the convex image line of the message image part have a constant image line width in the width direction of the ink transfer part corresponding to the bottom of the convex image line, and the convex image line is high. As the height of the ink in the vertical direction increases, the line width in the width direction becomes narrower, and the shape of the image line in the length direction is composed of a convex image line that changes in a wavy shape. In addition, the convex image line that changes to a wave shape in the background image portion and the convex image line that changes to a wave shape in the message image portion are the line width in the width direction of the convex surface of the convex image line. It is necessary to configure such that at least one of them is different. FIG. 3 (b) shows a partially enlarged view of FIG. 3 (a).
[0025]
The shape of the convex image line is not limited, and any one of the convex image lines in FIGS. 1B and 2A, 2B, 2C, 2D, and 2E can be selected or combined. it can. Further, the wavy shape accompanying the length direction of the convex image line is such that at least one of the period, the amplitude, the phase, and the line width in the width direction of the convex surface of the convex image line is continuous and / or stepped. It may be created by changing it.
[0026]
The convex image line that changes in a wavy shape in the background image portion described above and the convex image line that changes in a wavy shape in the message image portion are images in the width direction of the convex surface of the convex image line. As a diagram for explaining that at least one of the line widths is different, FIG. 4 shows a diagram when viewed from the direction perpendicular to the image line.
[0027]
FIG. 4A shows the convex image line (11) of the present invention in which the period D of the upper end portion of the convex image line that changes in a wave shape is changed to D ′ in the convex image line (2) of the present invention. Is. FIG. 4 (b) shows the convex image line (12) of the present invention in which the amplitude C of the upper end portion of the convex image line that changes in a wave shape is changed to C ′ in the convex image line (2) of the present invention. Is shown. FIG. 4 (c) shows the convex image line (13) of the present invention in which the phase of the upper end of the convex image line that changes in a wave shape is changed by a distance H in the convex image line (2) of the present invention. Is shown. Further, in FIG. 4D, the convex line (2) in the width direction of the convex surface of the convex line is narrower than the convex line (2) having a narrow line width in the convex direction of the convex surface of the convex line changing in a wavy shape. A convex image line (14) deformed so as to have an image line width B by a specific value is shown.
[0028]
FIG. 5 shows a case where the printed matter shown in FIG. 3 is observed from the vertical direction. When the printed matter is observed from the vertical direction, the message image portion cannot be confirmed because the width direction of the ink transfer portion corresponding to the bottom of the convex image line of the background image portion and the convex image line of the message image portion is constant. It becomes a state or a state that is difficult to confirm.
[0029]
FIG. 6 shows a case where the printed matter shown in FIG. 3 is observed obliquely. The convex image line that changes in a wavy shape in the background image portion and the convex image line that changes in a wave shape in the message image portion have at least the period, the amplitude, the phase, and the line width in the width direction of the convex surface of the convex image line. Because one or more of them are configured differently, the side part that connects the top and bottom of the image line appears to be bright where the light that reflects a lot of light is reflected, and light that reflects light that reflects little light. A change occurs in the reflection state pattern, and a brightness difference occurs between the background image portion and the message image portion, and a latent image appears. Also, in the background image portion and the message image portion, the reflection state of the light of the image line is controlled by continuously changing the image line width, amplitude, phase, and period of the convex surface of the convex image line. By making a continuous difference in the reflection pattern of the light entering the observer's eyes, a latent image pattern with better gradation can be produced.
[0030]
The height of the ink in the intaglio image line of the present invention is not particularly limited as long as there is no problem in print quality. However, judging from the quality of the printed matter, the image line in the width direction of the ink transfer portion corresponding to the bottom portion It is preferable that the width is 10 μm or more and 600 μm or less, and the height of the convex image line is 5 μm or more and 300 μm or less.
[0031]
When the image line width in the width direction of the ink transfer portion corresponding to the bottom is 10 μm or less, or 600 μm or more, and when the height of the image line is 5 μm or less, or 300 μm or more, it is difficult to produce the intaglio plate surface of the present invention. .
[0032]
The plate surface used for producing the anti-counterfeit printed material of the present invention needs to use an intaglio plate surface. In an intaglio plate surface produced by a so-called corrosion method generally used in the printing field, a continuous convex image is used. This is difficult because the cross-sectional shape of a part of the line cannot be changed periodically. Also, in the method of producing the image line by the NC engraving machine (numerically controlled engraving machine or numerically controlled machine tool), the engraving tool directly contacts the plate material to process the groove that forms the shape of the intaglio image line, so that the shape of the cross section Depends greatly on the shape of the tool. For this reason, each time the sectional shape of the image line is changed, the shape of the cutting tool must be changed to a different shape each time, and the cost of manufacturing the cutting tool itself is increased. For this reason, it is preferable to produce it with a laser processing machine that is non-contact and has a high degree of processing freedom.
[0033]
The printing method used for producing the forgery-preventing printed material of the present invention is an intaglio printing method.
[0034]
The base material used for the forgery-proof printed matter of the present invention is not particularly limited, such as paper and plastic.
[0035]
The intaglio ink used for the anti-counterfeit printed matter of the present invention is not particularly limited, but an ink of an electron beam curable type, an ultraviolet curable type, an oxidation polymerization type, a combination type of an ultraviolet curable type and an oxidation polymerization type is preferable.
[0036]
【Example】
EXAMPLES Hereinafter, although this invention is demonstrated further in detail using an Example, the content of this invention is not limited to the range of these Examples.
[0037]
(Example 1)
Fig. 7 (a) shows the intaglio printing with transparent UV-drying intaglio ink on coated paper and black fine paper using the intaglio plate surface, curing the ink film with ultraviolet rays, and the line width is 500μm. An image line configuration of a printed material G having a line height of 50 μm and an image line group having a triangular cross-sectional shape having no image width in the width direction of the convex surface of the convex image line produced at intervals of 300 μm. FIG.
[0038]
FIG. 7B is an enlarged view of a part of the printed material G. The amplitude and phase of the upper end are fixed to 200 μm, and the upper end of the message image part (10) is 2 mm, and the upper end of the background image part (9) is 12 mm. ing.
[0039]
FIG. 8 shows a case where the actual printed matter is observed from the vertical direction. However, since the latent image due to the shape of the image line does not appear, it is visually recognized as a simple line pattern. Next, when this printed matter is observed from an oblique direction, as shown in FIG. 9, a light and dark pattern in which a portion that reflects a lot of light hitting the surface of an image appears bright and a portion that reflects little light hits and appears dark. Since a change occurs and there is a continuous difference in the reflection state of light entering the observer's eyes between the message image portion and the background image portion, it is possible to confirm the character of the latent image “A” that is the message image portion. did it.
[0040]
When the printed matter of Example 1 was copied by a color copying machine (CLC900, manufactured by Canon Inc.), it was not possible to copy at all, and it was confirmed that it was effective as a copy prevention image.
[0041]
(Example 2)
Using the plate used in Example 1, intaglio printing with blue and brown UV-drying intaglio ink was performed on coated paper and black fine paper, and the ink film was cured with ultraviolet rays, as in Example 1. A plurality of continuous convex image lines having an image line width of 500 μm and an image line height of 50 μm in a triangular shape were formed at intervals of 300 μm.
[0042]
As for the surface state of the continuous convex image line of the blue and brown ultraviolet drying type intaglio ink, some unevenness was confirmed by the pigment in the ink. However, it is glossy as in the case of transparent UV-dried intaglio ink regardless of the color of the ink, and the image of this example that can be viewed only from a specific direction is the same as in Example 1 in the alphabet. “A” could be confirmed.
[0043]
When the printed matter of Example 2 was copied by a color copying machine (CLC900, manufactured by Canon Inc.), it was not possible to copy at all, and it was confirmed that it was effective as a copy prevention image.
[0044]
【The invention's effect】
Since the image line of the forgery-preventing printed material of the present invention has a complicated three-dimensional shape, it cannot be easily reproduced. In addition to excellent finger sensitivity and authenticity discrimination effect due to ink printing on intaglio image lines, images that can be viewed only from a specific direction and copy-prevention images have a very wide viewable range and few design restrictions. Since it cannot be copied with a copying machine, forgery, alteration and prevention of copying of certificate documents and securities certifying their identity, rights and qualifications can be achieved.
[0045]
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration example and a cross-sectional view of a convex image line according to the present invention.
FIG. 2 is a diagram showing a configuration example and a cross-sectional view of a convex image line according to the present invention.
FIG. 3 is a diagram showing an overview and a partially enlarged view of an image line configuration of a printed matter according to the present invention.
FIG. 4 is a diagram showing different shapes of the convex line in the present invention in terms of period, amplitude, phase, and line width in the width direction of the convex surface of the convex line.
FIG. 5 is a diagram showing a case where the printed matter of the present invention is observed from a vertical direction.
FIG. 6 is a diagram showing a case where the printed matter of the present invention is observed obliquely.
FIG. 7 is a diagram illustrating an overview and a partially enlarged view of an image line configuration of a printed matter of Example 1.
FIG. 8 is a diagram illustrating a case where the printed matter of Example 1 is observed from a vertical direction.
FIG. 9 is a diagram illustrating a case where the printed matter of Example 1 is observed obliquely.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base material 2 Convex image line 3 Image line width 3 'of the ink transfer part which is the bottom of the image line 3' Image line width 5 of the upper end part of image line 6 Height direction 6 Wave form 7 Section of convex image line Shape 8 Side surface portion connecting the upper end and bottom of the image line 9 Background image portion 10 Message image portion 11 Image line 12 in which the period of the upper end portion of the image line deformed in a wave shape has changed The amplitude of the upper end portion of the image line deformed in a wave shape has changed Image line 13 Image line 14 in which the phase of the upper end of the image line deformed into a wave shape is changed Image line A in which the width in the width direction of the image upper end portion of the image line deformed in a wave shape is changed A Width B at the lower bottom of the image line B Width C, C ′ Amplitude D at the upper end of the image line, D ′ Period at the upper end of the image line E Image line height F, G Printed matter H Phase shift

Claims

In the anti-counterfeit printed matter in which an image is formed on a base material by a configuration of a plurality of convex lines, the image is divided into a background image portion and a message image portion, and the background image portion and the message image portion include a plurality of Consists of a convex image line, and the convex image line has a constant line width in the width direction of the ink transfer portion corresponding to the bottom of the convex image line, and the height of the ink in the height direction of the convex image line is high. Accordingly, the image line width in the width direction becomes narrower, the position in the width direction of the upper end with respect to the bottom of the convex image line is configured to change in a wave shape in the length direction, and change in the wave shape in the background image portion. The convex image line that changes in a wavy shape in the message image portion is different in at least one of the period, amplitude, phase, and the image width in the width direction of the uppermost end of the convex image line. An anti-counterfeit printed matter characterized by being configured as described above.

The convex image line that changes in a wavy shape in the background image portion and the message image portion is at least one of a period, an amplitude, a phase, and a line width in the width direction of the uppermost end portion of the convex image line on the same image line. 2. The forgery-preventing printed matter according to claim 1, wherein the above is different.

The line width in the width direction of the ink transfer portion corresponding to the bottom of the convex image line is from 10 μm to 600 μm, and the height of the convex image line is from 5 μm to 300 μm. The forgery prevention printed matter of 1 or 2 .