JP3695534B2

JP3695534B2 - Intaglio plate surface and intaglio print

Info

Publication number: JP3695534B2
Application number: JP2002227351A
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: 2005-09-14
Anticipated expiration: 2022-08-05
Also published as: JP2004066579A

Description

【０００１】
【発明の属する技術分野】
本発明は、特殊形状の凹部を有する凹版版面及びその作製方法並びにそれを利用した複製防止効果を有する凹版印刷物に関するものである。
【０００２】
【従来の技術】
凹版印刷方式は、彫刻を施した凹版版面に凹版インキを塗布し、凹部の線の中に凹版インキが詰め込まれ、凹版版面の表面のインキを拭き取り凹部のインキのみを残し、紙の上から圧力を加えることによって紙が圧力によって版面の凹部に少し押し込まれ、凹部のインキが紙の表面に盛り上がった状態で印刷される。このようなインキが盛り上がった状態で紙に印刷されることによって、芸術性が求められる印刷物、偽造防止が求められる印刷物に利用されている。
【０００３】
版としては直刻凹版又は食刻凹版等があり、原版の製版方法としては手彫刻法による方法と機械彫刻による方法があり、金属版に彫刻する方法と、彫刻後化学腐蝕で仕上げる方法が一般的である。凹版版面は原版から転写法又は電鋳法によって作られる。
【０００４】
従来の凹版画線の形状の断面図を図１に示す。図１に示すように従来の凹版画線の形状は基材（１）に対して画線（Ｘ）は、四角形の形状、画線（Ｙ）は、三角形の形状、画線（Ｚ）は、楕円の形状であった。
【０００５】
よって、図２に示すように図１に示したそれぞれの画線を作製するための凹版版面の断面形状は、図１で示した画線（Ｘ）の版面はＸ’に示すような四角形の形状であり、画線（Ｙ）の版面はＹ’に示すような三角形の形状であり、画線（Ｚ）の版面はＺ’に示すよう楕円の形状となる必要があった。
【０００６】
上記図１に示す画線は、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。
【０００７】
このようなことから、一本一本の画線を複雑化した印刷物を得るための凹版版面の作製が望まれてきている。しかしながら、凹版版面を作製するにあたり、従来の腐食、ビュラン、機械彫刻では作成することが困難であった。
【０００８】
【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。よって、一本一本の画線形状を三次元的に複雑化するためには、その画線を印刷するための凹版版面を作成する必要があった。
【０００９】
本発明は上記の問題点を鑑みてなされたもので、凹版版面において、凹版版面は、複数本の凹部を有し、複数本の凹部のうち、少なくとも一本以上の凹部は、凹部の深さ方向に伴い、凹部の幅が狭くなり、長さ方向は波状に変化するように構成した特殊形状の凹部を有する凹版版面で印刷した印刷物は複製防止効果を有する凹版印刷物になり得ることを見出した。
【００１０】
また、凹版版面の凹部は、レーザ彫刻法によって作製されたことによって上記記載の複雑な凹版版面の凹部を作製できることを見出した。本発明は上記記載の凹版版面及びその作製方法並びにそれを利用した凹版印刷物を提案するものである。
【００１１】
【課題を解決するための手段】
本発明は、凹版版面において、前記凹版版面は、複数本の凹部を有し、前記複数本の凹部のうち、少なくとも一本以上の凹部は、前記凹部の深さ方向に伴い、凹部の幅が狭くなり、長さ方向は波状に変化するように構成されたことを特徴とする凹版版面である。
【００１２】
また、本発明は、前記凹部の上端部にあたるインキ転移部の凹部の幅が一定で構成されていることを特徴とする凹版版面である。
【００１３】
また、本発明は、前記複数本の凹部で、文字、記号、数字、図柄、又は地紋模様を構成することを特徴とする凹版版面である。
【００１４】
また、本発明は、凹版版面の作製方法において、前記凹版版面を、レーザ彫刻機によって、複数本の凹部で形成し、前記複数本の凹部の内、少なくとも一本以上の凹部は、前記凹部の深さ方向に伴い、凹部の幅が狭くなり、長さ方向は波状に変化するように形成させることを特徴とする凹版版面の作製方法である。
【００１５】
また、本発明は、前記凹部の上端部にあたるインキ転移部の凹部の幅が一定であるように形成させることを特徴とする凹版版面の作製方法である。
【００１６】
また、本発明は、前記複数本の凹部で、文字、記号、数字、図柄、又は地紋模様を形成することを特徴とする凹版版面の作製方法である。
【００１７】
また、本発明は、前記凹版版面を用いて、凹版印刷機で印刷されたことを特徴とする凹版印刷物である。
【００１８】
【発明の実施の形態】
以下に、本発明に係る凹版版面及びその作製方法並びにそれを利用した凹版印刷物について図面を用いて説明する。また、本発明に係る凹版版面及びその作製方法並びにそれを利用した凹版印刷物は、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。
【００１９】
図面によって本発明の凹版印刷物の一例を説明する。図３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３に示すように凸状画線（２）は、凸状画線（２）の高さ方向（３）のインキの盛りが高くなるに伴い、画線幅（４）が狭くなり、長さ方向の画線形状は波状（５）に変化する凸状画線（２）で構成される。この場合、凸状画線の底部にあたるインキ転移部の画線幅（４’）が一定であるが、凸状画線の底部にあたるインキ転移部の画線幅（４’）は一定でなくても良い。また、画線の断面形状（６）は台形を有している。
【００２０】
図３で示した凹版画線を印刷するための凹版版面を図４に示す。凹版版面は、版材（７）に図３で示した凸状画線（２）となる凹部（１２）は凹部の深さ方向（９）が深くなるに伴い、凹部の幅（１０）が狭くなり、長さ方向の凹部形状は波状（１１）に変化する凹部で構成される。この場合、凹部の上端部にあたるインキ転移部の凹部の幅（１０’）が一定であるが、凹部の上端部にあたるインキ転移部の凹部の幅（１０’）が一定でなくても良い。また、破線で示した凹部の断面形状（６）は台形を有している。
【００２１】
図５（ａ）乃至図６（ｃ）に本発明の凸状画線のその他の形状について例を示す。図５（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（１１）は図５（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。
【００２２】
図５（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（１１）は図５（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。
【００２３】
図６（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）がある特定の値をもち、その上端部が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、凸状画線（２）の断面形状（１１）は図６（ａ）に示すとおり三角形状の場合の画線形状である。
【００２４】
図６（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、連続的な膨らんだ曲面を有し、凸状画線（２）の断面形状（１１）は図６（ｂ）に示すとおり膨らんだ三角形状の場合の画線形状である。
【００２５】
図６（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、連続的な凹んだ曲面を有し、凸状画線（２）の断面形状（１１）は図６（ｃ）に示すとおり凹んだ三角形状の場合の画線形状である。
【００２６】
図５（ａ）乃至図６（ｃ）に示した本発明の凸状画線の凹版版面の形状を図７（ａ）乃至図８（ｃ）に示す。図７（ａ）は、図５（ａ）の凹版版面であり、一定の深度（Ｅ’）の凹部（１２）であり、インキ転移部である凹部の上端部の幅（Ａ’）と底部の幅（Ｂ’）がある特定の値をもち、長さ方向に波状に変化し、凹部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、凹部（１２）の断面形状（１１）は図７（ａ）に示すように膨らんだ四角形状の凹部形状である。
【００２７】
図７（ｂ）は、図５（ｂ）の凹版版面であり、一定の深度（Ｅ’）の凹部（１２）であり、インキ転移部である凹部の上端部の幅（Ａ’）と底部の幅（Ｂ’）がある特定の値をもち、長さ方向に波状に変化し、凹部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、凹部（１２）の断面形状（１１）は図７（ｂ）に示すように凹んだ四角形状の凹部形状である。
【００２８】
図８（ａ）は、図６（ａ）の凹版版面であり、一定の深度（Ｅ’）の凹部（１２）であり、インキ転移部である凹部の上端部の幅（Ａ’）がある特定の値をもち、その底部が長さ方向に波状に変化し、凹部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、凹部（１２）の断面形状（１１）は図８（ａ）に示すように三角形の凹部形状である。
【００２９】
図８（ｂ）は、図６（ｂ）の凹版版面であり、一定の深度（Ｅ’）の凹部（１２）であり、インキ転移部である凹部の上端部の幅（Ａ’）がある特定の値をもち、その底部が長さ方向に波状に変化し、凹部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、凹部（１２）の断面形状（１１）は図８（ｂ）に示すように膨らんだ三角形状の凹部形状である。
【００３０】
図８（ｃ）は、図６（ｃ）の凹版版面であり、一定の深度（Ｅ’）の凹部（１２）であり、インキ転移部である凹部の上端部の幅（Ａ’）がある特定の値をもち、その底部が長さ方向に波状に変化し、凹部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、凹部（１２）の断面形状（１１）は図８（ｃ）に示すように凹んだ三角形状の凹部形状である。
【００３１】
また、図５（ａ）乃至図６（ｃ）の凸状画線（２）において、図９に示すように本発明の凸状画線（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（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）の１/２の幅より大きいと、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。
【００３２】
よって、凹版版面となる図７（a）乃至図８（ｃ）の凹部（１２）において、図１０に示すように本発明の凹部（１２）の底部の幅方向の幅（Ｂ’）の１/２の幅とその振幅（Ｃ’）を加えた値が、凹版画線形状の都合上、凹部（１２）の上端部の幅（Ａ’）と同じかそれよりも小さくする必要がある。本発明の凹部の底部の幅方向の幅（Ｂ’）の１/２の幅とその振幅（Ｃ’）を加えた値が、凹版画線形状の都合上、凹部の上端部の幅（Ａ’）の１/２の幅よりより大きいと、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。
【００３３】
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、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。本発明の凹版画線で、文字、記号、数字、図柄、地紋模様を構成する場合、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以下であることが好ましい。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。
【００３４】
本発明の凹版版面は、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、作業性が低下してしまうとともに、バイト自体を作製するコストもかかってしまう。そこで、非接触で加工の自由度が高いレーザ加工機を用いて凹版版面を作製するのが好ましい。
【００３５】
本発明の印刷物は、一本一本の画線形状を三次元的に複雑化した特殊な形状を有しているため、偽造者が複製しようと思っても上記記載の画線形状を有した印刷物を作成しようと試みても容易に作製することができないため、偽造防止効果を有する貴重印刷物に利用できる。また、複写機により複写されない画線となるため、複写防止効果にも優れる。更に、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、画像を構成する凸状の画線の断面形状の周期的な変化、凸状の画線の表面状態及び凸状の画線を作製する材料の光学的性質によって、この凸状の画線に当たった光の反射状態が異なることを応用したもので、連続する凸状の画線の断面形状において、その上端部をインキ転移部である画線底部の幅方向に振幅させ、その断面形状を周期的に変形させて基材（媒体）上に作製した画像であり、本発明の連続する凸状の画線の上端部の幅、振幅、周期を変化させることにより、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明暗のパターンに変化が生じるため、凹版画線で階調を有する印刷物が得られ、真偽判別効果にも優れる印刷物が得られる。
【００３６】
本発明の凹版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。
【００３７】
本発明の凹版版面はエンボス版面としても利用できる。
【００３８】
本発明の凹版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。
【００３９】
【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。
【００４０】
（実施例１）
【００４１】
コンピュータ上で、作製した図１１に示す三次元の画線データ（Ｇ）を用い、レーザ彫刻で彫刻する凹部の深度（Ｅ’）に対し１回の彫刻で彫り下げることができる深さ（Ｊ）を設定し、（Ｊ）ごとに凹部の深さ方向の断面形状の層（Ｈ）を加工領域として抽出し、その抽出された加工領域の１層ごとに、レーザ光を走査線状に移動させて彫刻を行い、凹版原版を作製した。本発明の彫刻方向、彫刻回数は特に限定されるものではない。
【００４２】
得られた、原版を用いて凹版版面を作製し、通常の凹版インキによって凹版印刷機で基材に印刷した。得られた印刷物を図１２に示す。図１２は得られた印刷物に対して垂直方向から観察した場合の図である。
【００４３】
図１２の印刷物を傾けて観察すると図１３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、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、画線自体に階調を有しているように観察される。
【００４４】
本実施例１の印刷物を複写機（ＣＬＣ９００、キャノン社製）で複写し、複写した複写物を傾けて観察しても、画線自体に階調を有しているように観察されることはなかった。
【００４５】
【発明の効果】
本発明は、三次元的に複雑化した特殊な形状を有した凹版画線を作成するために、三次元的に複雑化した特殊形状の凹部を有する凹版版面が必要であり、レーザ彫刻によって容易に作製でき、凹版版面は、複数本の凹部を有し、複数本の凹部のうち、少なくとも一本以上の凹部は、凹部の深さ方向に伴い、凹部の幅が狭くなり、長さ方向は波状に変化するように構成した特殊形状の凹部を有する凹版版面で印刷した印刷物は複製防止効果を有する凹版印刷物となる。
【００４６】
本発明の印刷物は、一本一本の画線形状を三次元的に複雑化した特殊な形状を有しているため、偽造者が複製しようと思っても本発明の画線形状を有した印刷物を作成しようと試みても容易に作製することができないため、偽造防止効果を有する貴重印刷物に利用できる。また、複写機により複写されない画線となるため、複写防止効果にも優れる。更に、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、画像を構成する凸状の画線の断面形状の周期的な変化、凸状の画線の表面状態及び凸状の画線を作製する材料の光学的性質によって、この凸状の画線に当たった光の反射状態が異なることを応用したもので、連続する凸状の画線の断面形状において、その上端部をインキ転移部である画線底部の幅方向に振幅させ、その断面形状を周期的に変形させて基材（媒体）上に作製した画像であり、本発明の連続する凸状の画線の上端部の幅、振幅、周期を変化させることにより、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明暗のパターンに変化が生じるため、凹版画線で階調を有する印刷物が得られ、真偽判別効果にも優れる印刷物が得られる。
【００４７】
【図面の簡単な説明】
【図１】従来の凹版画線の形状を示す断面図である。
【図２】図１に示した凹版画線を印刷するための凹版版面を示す断面図である。
【図３】本発明の画線形状において、画線上端部がある特定の幅を有していない場合の寸法要素を示す図である。
【図４】図３に示した凹版画線の凹版版面を示す。
【図５】本発明の凹版画線の他の例を示す。
【図６】本発明の凹版画線の他の例を示す。
【図７】図５に示した凹版画線の凹版版面を示す。
【図８】図６に示した凹版画線の凹版版面を示す。
【図９】画線の上端部の波状変化の制限を示す。
【図１０】版面の底部の波状変化の制限を示す。
【図１１】コンピュータ上で作成したレーザ彫刻用画線データ、および彫刻方法を示す図である。
【図１２】本発明の画線を印刷した印刷物を真上から観察した図である。
【図１３】本発明の画線を印刷した印刷物を斜めから観察した図である。
【符号の説明】
１基材
２凸状画線
３インキの高さ方向
４画線幅
４’ インキ転移部の画線幅
５波状
６画線の断面形状
７版材
８上端部と底部をつなぐ側面部分
９画線の深度方向
１０凹部の幅
１０’ インキ転移部の凹部の幅
１１波状
１２版面の凹部
Ａ画線底部の幅
Ｂ画線上端部の幅
Ｃ画線上端部の振幅
Ｄ画線上端部の周期
Ｅ彫刻される画線の深度
Ａ’ 凹部の上端部の幅
Ｂ’ 凹部の底部の幅
Ｃ’ 凹部の底部の振幅
Ｄ’ 凹部の底部の周期
Ｅ’ 深度
Ｊレーザ彫刻機により、一回で彫刻される深度
Ｆ印刷物
Ｇコンピュータ上で作成したレーザ彫刻データ
Ｈ設定された彫刻深さＪごとの深さ方向の画線の断面形状
Ｘ，Ｙ、Ｚ画線
Ｘ’、Ｙ’、Ｚ’ 凹部[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an intaglio plate having a specially-shaped recess, a method for producing the same, and an intaglio print having an anti-duplication effect using the same.
[0002]
[Prior art]
The intaglio printing method applies intaglio ink to the engraved intaglio plate surface, stuffs the intaglio ink into the lines of the recesses, wipes the ink on the surface of the intaglio plate surface, leaves only the ink in the recesses, and presses the pressure from the top of the paper The paper is pushed a little into the concave portion of the plate surface by pressure, and the ink in the concave portion is printed in a state of rising on the surface of the paper. By printing such paper on paper in a raised state, it is used for printed matter that requires artisticity and printed matter that requires anti-counterfeiting.
[0003]
There are direct intaglio plates or etching intaglio plates, etc., and the original plate making methods include the manual engraving method and the mechanical engraving method, the method of engraving on the metal plate and the method of finishing with chemical corrosion after engraving Is. The intaglio plate surface is made from the original plate by a transfer method or an electroforming method.
[0004]
A sectional view of the shape of a conventional intaglio image line is shown in FIG. As shown in FIG. 1, the shape of the conventional intaglio image line is the quadrilateral shape, the image line (Y) is a triangular shape, and the image line (Z) is the image of the substrate (1). The shape was oval.
[0005]
Therefore, as shown in FIG. 2, the cross-sectional shape of the intaglio plate surface for producing each image line shown in FIG. 1 is the square shape of the image line (X) shown in FIG. The plate surface of the image line (Y) had a triangular shape as indicated by Y ′, and the plate surface of the image line (Z) had to have an elliptical shape as indicated by Z ′.
[0006]
The image line shown in FIG. 1 is a plate produced by printing using an intaglio plate surface produced by a corrosion method generally performed in the printing field or by a corrosion method generally performed in metalworking. It can be easily obtained by hot stamping using. 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.
[0007]
For these reasons, it has been desired to produce an intaglio plate surface for obtaining a printed matter in which each image line is complicated. However, in producing the intaglio plate surface, it was difficult to produce it by conventional corrosion, burin, and mechanical engraving.
[0008]
[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. Therefore, in order to complicate each line shape three-dimensionally, it is necessary to create an intaglio plate surface for printing the line.
[0009]
The present invention has been made in view of the above-described problems. In the intaglio plate surface, the intaglio plate surface has a plurality of recesses, and at least one of the plurality of recesses has a depth of the recess. It was found that the printed matter printed on the intaglio plate surface having a specially-shaped concave portion configured so that the width of the concave portion becomes narrower and the length direction changes in a wavy shape with the direction can be an intaglio printed matter having an anti-duplication effect. .
[0010]
Moreover, it discovered that the recessed part of the above-mentioned complicated intaglio plate surface was producible by producing the recessed part of the intaglio plate surface by the laser engraving method. The present invention proposes an intaglio plate surface described above, a method for producing the same, and an intaglio print using the same.
[0011]
[Means for Solving the Problems]
In the intaglio plate surface, the intaglio plate surface has a plurality of recesses, and at least one of the plurality of recesses has a width of the recess in the depth direction of the recess. It is an intaglio plate surface characterized in that it is narrowed and the length direction changes in a wave shape.
[0012]
The present invention also provides the intaglio plate surface, wherein the width of the concave portion of the ink transfer portion corresponding to the upper end portion of the concave portion is configured to be constant.
[0013]
Moreover, this invention is an intaglio plate surface characterized by comprising a character, a symbol, a number, a design, or a tint block pattern by the said several recessed part.
[0014]
Further, the present invention provides the method for producing an intaglio plate surface, wherein the intaglio plate surface is formed with a plurality of recesses by a laser engraving machine, and at least one of the plurality of recesses is formed of the recesses. A method for producing an intaglio plate surface, characterized in that the width of a concave portion becomes narrower in the depth direction and the length direction changes in a wavy shape.
[0015]
Further, the present invention is a method for producing an intaglio printing plate, wherein the width of the concave portion of the ink transfer portion corresponding to the upper end portion of the concave portion is formed to be constant.
[0016]
Further, the present invention is a method for producing an intaglio printing plate, wherein a letter, a symbol, a number, a pattern, or a tint block pattern is formed by the plurality of recesses.
[0017]
Moreover, this invention is an intaglio printed matter printed by the intaglio printing machine using the said intaglio plate surface.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an intaglio plate surface according to the present invention, a method for producing the same, and an intaglio print using the same will be described with reference to the drawings. Further, the intaglio plate surface and the method for producing the same and the intaglio printed matter using the same according to the present invention are not limited to the present embodiment, but within the scope of the technical matters described in the claims of the present invention. If it exists, various aspects can be adopted.
[0019]
An example of the intaglio printed matter of the present invention will be described with reference to the drawings. FIG. 3 is a printed matter (F) in which the convex image line (2) of the present invention is formed on the substrate (1). As shown in FIG. 3, the convex line (2) has a narrow line width (4) as the height of ink in the height direction (3) of the convex line (2) increases. The vertical image line shape is composed of a convex image line (2) that changes into a wave shape (5). In this case, the line width (4 ′) of the ink transfer portion corresponding to the bottom of the convex image line is constant, but the line width (4 ′) of the ink transfer portion corresponding to the bottom of the convex image line is not constant. Also good. The section shape (6) of the image line has a trapezoidal shape.
[0020]
FIG. 4 shows an intaglio plate surface for printing the intaglio image line shown in FIG. In the intaglio plate surface, the concave portion (12) which becomes the convex image line (2) shown in FIG. 3 on the plate material (7) has a concave portion width (10) as the depth direction (9) of the concave portion becomes deeper. The concave shape in the lengthwise direction is narrow, and is constituted by a concave portion that changes into a wave shape (11). In this case, the width (10 ′) of the concave portion of the ink transfer portion corresponding to the upper end portion of the concave portion is constant, but the width (10 ′) of the concave portion of the ink transfer portion corresponding to the upper end portion of the concave portion may not be constant. Moreover, the cross-sectional shape (6) of the recessed part shown with the broken line has a trapezoid.
[0021]
FIG. 5A to FIG. 6C show examples of other shapes of the convex image line of the present invention. FIG. 5A shows a convex image line (2) having a constant image line height (E). The image line width (A) at the bottom, which is an ink transfer portion, and the image line width (B) at the upper end. The side surface portion (8) that has a certain value and 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, and the convex image line (2) The cross-sectional shape (11) is an image line shape in the case of a swelled quadrangular shape as shown in FIG.
[0022]
FIG. 5B is a convex image line (2) having a constant image line height (E). The image line width (A) at the bottom, which is an ink transfer portion, and the image line width (B) at the upper end. The side surface portion (8) that has a specific value and 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 image line (2) The cross-sectional shape (11) is an image line shape in the case of a concave quadrangular shape as shown in FIG.
[0023]
FIG. 6A shows a convex image line (2) having a constant image height (E), which has a certain value at the bottom image line width (A) which is an ink transfer portion, and its upper end. The side portion (8) connecting the top and bottom of the image line has a continuous straight line, and the cross-sectional shape (11) of the convex image line (2) is shown in FIG. As shown in FIG. 6 (a), the image line shape is a triangular shape.
[0024]
FIG. 6B is a convex image line (2) having a constant image line height (E). The image line width (A) at the bottom, which is an ink transfer portion, and the image line width (B) at the upper end. The side surface portion (8) that has a certain value and 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, and the convex image line (2) The cross-sectional shape (11) is an image line shape in the case of a swelled triangular shape as shown in FIG.
[0025]
FIG. 6C shows a convex image line (2) having a constant image line height (E). The image line width (A) at the bottom, which is an ink transfer portion, and the image line width (B) at the upper end. The side surface portion (8) that has a specific value and 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 image line (2) The cross-sectional shape (11) is an image line shape in the case of a recessed triangular shape as shown in FIG.
[0026]
The shape of the intaglio plate surface of the convex image line of the present invention shown in FIGS. 5 (a) to 6 (c) is shown in FIGS. 7 (a) to 8 (c). FIG. 7 (a) is the intaglio plate surface of FIG. 5 (a), which is a concave portion (12) having a constant depth (E ′), and the width (A ′) and bottom portion of the upper end portion of the concave portion which is an ink transfer portion. The width (B ′) has a certain value, changes in a wave shape in the length direction, and the side surface portion (8) connecting the upper end portion and the bottom portion of the concave portion has a continuous bulging curved surface, The cross-sectional shape (11) of 12) is a rectangular concave shape that swells as shown in FIG.
[0027]
FIG. 7 (b) is the intaglio plate surface of FIG. 5 (b), which is a recess (12) having a constant depth (E ′), and the width (A ′) and bottom of the upper end of the recess that is an ink transfer portion. The width (B ') has a certain value, changes in a wave shape in the length direction, and the side surface portion (8) connecting the top and bottom of the recess has a continuous concave curved surface, The cross-sectional shape (11) of 12) is a concave shape having a concave shape as shown in FIG.
[0028]
FIG. 8A is the intaglio plate surface of FIG. 6A, which is a concave portion (12) having a constant depth (E ′), and has a width (A ′) of the upper end portion of the concave portion which is an ink transfer portion. The side surface portion (8) having a specific value, the bottom portion of which changes in a wave shape in the length direction, and connects the upper end portion and the bottom portion of the concave portion has a continuous straight line, and the cross-sectional shape of the concave portion (12) (11 ) Has a triangular recess shape as shown in FIG.
[0029]
FIG. 8B is the intaglio plate surface of FIG. 6B, which is a recess (12) having a constant depth (E ′), and has a width (A ′) of the upper end of the recess that is an ink transfer portion. The side surface portion (8) having a specific value, the bottom portion of which changes in a wave shape in the length direction, and connects the upper end portion and the bottom portion of the concave portion has a continuously bulging curved surface, and the sectional shape of the concave portion (12) (11) is a triangular concave shape that swells as shown in FIG.
[0030]
FIG. 8C is the intaglio plate surface of FIG. 6C, which is a recess (12) having a constant depth (E ′), and has a width (A ′) of the upper end of the recess that is an ink transfer portion. The side portion (8) having a specific value, its bottom portion changing in a wave shape in the length direction, and connecting the upper end portion and the bottom portion of the concave portion has a continuous concave curved surface, and the sectional shape of the concave portion (12) (11) is a triangular concave shape that is recessed as shown in FIG.
[0031]
Further, in the convex image line (2) of FIGS. 5A to 6C, as shown in FIG. 9, the image line width (in the width direction of the convex surface of the convex image line (2) of the present invention ( The value obtained by adding 1/2 the width of B) and its amplitude C needs to be equal to 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 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 of the present invention and the amplitude (C) is the bottom of the image line. If the width is larger than ½ of the width (A), the ink transfer is hindered, and a latent image pattern with excellent gradation is unlikely to appear, and the effects of the present invention cannot be achieved.
[0032]
Therefore, in the concave portion (12) of FIGS. 7 (a) to 8 (c) which is the intaglio plate surface, as shown in FIG. 10, the width (B ′) of the width of the bottom portion of the concave portion (12) of the present invention is 1 The value obtained by adding the width of / 2 and its amplitude (C ′) needs to be the same as or smaller than the width (A ′) of the upper end of the recess (12) for the convenience of the intaglio line shape. For the convenience of the intaglio line shape, the width (A) of the upper end of the recess is defined as a value obtained by adding 1/2 the width (B ′) in the width direction of the bottom of the recess of the present invention and the amplitude (C ′). When the width is larger than ½ of '), the ink transfer is hindered, and a latent image pattern with excellent gradation is unlikely to appear, and the effects of the present invention cannot be achieved.
[0033]
The height of the ink on 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 height of the convex image line is 5 μm. It is preferable that it is 300 micrometers or less above. When a letter, a symbol, a number, a pattern, and a tint block pattern are formed by the intaglio image line of the present invention, the image line width in the width direction of the ink transfer portion corresponding to the bottom is preferably from 10 μm to 600 μm. 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. .
[0034]
In the intaglio plate surface of the present invention, the intaglio plate surface produced by a so-called corrosion method that has been generally performed in the printing field can periodically change the sectional shape of a part of a continuous convex image line. It is difficult because it cannot be done. 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 cross-sectional shape of the drawing line is changed, the tool must be changed to a different tool shape each time, which reduces workability and increases the cost of manufacturing the tool itself. End up. Therefore, it is preferable to produce the intaglio plate surface using a laser processing machine that is non-contact and has a high degree of freedom of processing.
[0035]
The printed matter of the present invention has a special shape obtained by three-dimensionally complicating the shape of each line, so even if a forger wanted to copy it, the line shape was as described above. Even if an attempt is made to create a printed matter, the printed matter cannot be easily produced. Therefore, it can be used for a valuable printed matter having an anti-counterfeit effect. Further, since the image line is not copied by the copying machine, the effect of preventing copying is excellent. Furthermore, not only the excellent finger sensitivity and authenticity discrimination effect due to the ink printing of the intaglio image line, but also the periodic change of the cross-sectional shape of the convex image line constituting the image, the surface state of the convex image line, and Applying the fact that the reflection state of the light hitting this convex image differs depending on the optical properties of the material that produces the convex image, the cross-sectional shape of the continuous convex image is This is an image produced on a substrate (medium) by swinging the upper end portion in the width direction of the bottom of the image line, which is an ink transfer portion, and periodically deforming its cross-sectional shape. By changing the width, amplitude, and period of the top edge of the line, the side that connects the top and bottom of the image line looks bright and the part that reflects a lot of light hits and the part that reflects less light hits Since the light-dark pattern that appears dark appears to change, Printed material having a gradation obtained by streaking, the printed matter excellent in authenticity discrimination effect can be obtained.
[0036]
The base material used for the intaglio printed matter of the present invention is not particularly limited, such as paper and plastic.
[0037]
The intaglio plate surface of the present invention can also be used as an embossed plate surface.
[0038]
The intaglio ink used for the intaglio 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.
[0039]
【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.
[0040]
(Example 1)
[0041]
On the computer, the depth (J ′) that can be carved by one engraving with respect to the depth (E ′) of the recess to be engraved by laser engraving using the three-dimensional drawing data (G) shown in FIG. ), And the layer (H) having a cross-sectional shape in the depth direction of the recess is extracted as a processing region every (J), and the laser beam is moved in a scanning line for each layer of the extracted processing regions Engraving was performed to produce an intaglio original plate. The engraving direction and the number of engravings of the present invention are not particularly limited.
[0042]
An intaglio plate surface was prepared using the obtained original plate, and printed on a substrate with an intaglio printing machine using a normal intaglio ink. The obtained printed matter is shown in FIG. FIG. 12 is a diagram when the obtained printed matter is observed from the vertical direction.
[0043]
When the printed matter of FIG. 12 is tilted and observed, as shown in FIG. 13, the bright and dark pattern is changed such that a portion where a lot of light hitting the surface of the image is reflected appears bright and a portion where the reflected light is little reflected appears dark. As a result, a continuous difference occurs in the reflection state of light entering the observer's eyes, so that the image line itself is observed as having a gradation.
[0044]
Even if the printed matter of Example 1 is copied with a copying machine (CLC900, manufactured by Canon Inc.) and the copied copy is tilted and observed, the image line itself is observed to have gradation. There wasn't.
[0045]
【The invention's effect】
The present invention requires an intaglio plate surface having a three-dimensionally complicated special shape in order to create an intaglio image line having a special shape complicated three-dimensionally. The intaglio plate surface has a plurality of recesses, and among the plurality of recesses, at least one or more of the recesses decreases in width along the depth direction of the recesses, and the length direction is A printed matter printed on an intaglio plate having a specially-shaped concave portion configured to change in a wave shape becomes an intaglio printed matter having an anti-duplication effect.
[0046]
Since the printed matter of the present invention has a special shape obtained by three-dimensionally complicating the shape of each image line, even if a counterfeiter wants to reproduce the image, the image shape of the present invention is retained. Even if an attempt is made to create a printed matter, the printed matter cannot be easily produced. Therefore, it can be used for a valuable printed matter having an anti-counterfeit effect. Further, since the image line is not copied by the copying machine, the effect of preventing copying is excellent. Furthermore, not only the excellent finger sensitivity and authenticity discrimination effect due to the ink printing of the intaglio image line, but also the periodic change of the cross-sectional shape of the convex image line constituting the image, the surface state of the convex image line, and Applying the fact that the reflection state of the light hitting this convex image differs depending on the optical properties of the material that produces the convex image, the cross-sectional shape of the continuous convex image is This is an image produced on a substrate (medium) by swinging the upper end in the width direction of the bottom of the image line, which is an ink transfer portion, and periodically deforming its cross-sectional shape. By changing the width, amplitude, and period of the top edge of the line, the side that connects the top and bottom of the image line looks bright and the part that reflects a lot of light hits and the part that reflects less light hits Since the light-dark pattern that appears dark appears to change, Printed material having a gradation obtained by streaking, the printed matter excellent in authenticity discrimination effect can be obtained.
[0047]
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing the shape of a conventional intaglio image line.
FIG. 2 is a cross-sectional view showing an intaglio plate surface for printing the intaglio image line shown in FIG.
FIG. 3 is a diagram showing dimension elements when the upper end of the image line does not have a certain width in the image line shape of the present invention.
4 shows an intaglio surface of the intaglio image line shown in FIG.
FIG. 5 shows another example of the intaglio image line of the present invention.
FIG. 6 shows another example of the intaglio line of the present invention.
7 shows an intaglio surface of the intaglio image line shown in FIG.
8 shows an intaglio surface of the intaglio image line shown in FIG.
FIG. 9 shows the restriction on the wavy change at the top of the image line.
FIG. 10 shows the limitation of the wavy change at the bottom of the printing plate.
FIG. 11 is a diagram showing image line data for laser engraving created on a computer and an engraving method;
FIG. 12 is a view of the printed matter on which the image line of the present invention is printed, observed from directly above.
FIG. 13 is a view of a printed matter on which an image line of the present invention is printed, observed from an oblique direction.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Base material 2 Convex image line 3 Ink height direction 4 Image line width 4 'Image transfer line width 5' Wave shape 6 Cross-sectional shape of image line 7 Plate material 8 Side surface part 9 which connects upper end part and bottom part 9 Image line Depth direction 10 Recess width 10 'Ink transfer recess width 11 Wavy 12 Plate surface recess A Image line bottom width B Image line upper edge width C Image line upper edge amplitude D Image line upper edge period E Depth of the engraved image line A 'Width of the upper end of the recess B' Width of the bottom of the recess C 'Amplitude of the bottom of the recess D' Period of the bottom of the recess E 'Depth J Engraved once by a laser engraving machine Depth F Printed matter G Laser engraving data created on a computer H Cross-sectional shape X, Y, Z in the depth direction for each set engraving depth J Image lines X ′, Y ′, Z ′ Recess

Claims

In intaglio prints,
The intaglio printed matter has a plurality of intaglio image lines, and at least one intaglio image line of the plurality of intaglio image lines changes a cross-sectional shape, and has an upper end portion with respect to a bottom portion of the intaglio image line. An intaglio printed matter, wherein the position in the width direction is formed to change in a wave shape in the length direction.

In the intaglio plate surface,
The intaglio plate surface has a plurality of recesses, and at least one of the plurality of recesses changes a cross-sectional shape, and the width direction position of the bottom with respect to the upper end of the recess is in the length direction. An intaglio plate surface characterized by being formed to change in a wave shape.