JPH04270660A - Image forming method - Google Patents
Image forming methodInfo
- Publication number
- JPH04270660A JPH04270660A JP3038025A JP3802591A JPH04270660A JP H04270660 A JPH04270660 A JP H04270660A JP 3038025 A JP3038025 A JP 3038025A JP 3802591 A JP3802591 A JP 3802591A JP H04270660 A JPH04270660 A JP H04270660A
- Authority
- JP
- Japan
- Prior art keywords
- ink
- printing paper
- layer
- printing
- image
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000007639 printing Methods 0.000 claims abstract description 66
- 230000007246 mechanism Effects 0.000 claims abstract description 12
- 238000004804 winding Methods 0.000 claims abstract description 9
- 239000003086 colorant Substances 0.000 claims description 8
- 238000000016 photochemical curing Methods 0.000 claims description 6
- 230000032258 transport Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 8
- 230000001915 proofreading effect Effects 0.000 abstract description 4
- 239000000976 ink Substances 0.000 description 89
- 239000010410 layer Substances 0.000 description 52
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 12
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 9
- 239000000049 pigment Substances 0.000 description 9
- 239000000975 dye Substances 0.000 description 7
- 239000000203 mixture Substances 0.000 description 5
- -1 oligomers Substances 0.000 description 5
- 229920005992 thermoplastic resin Polymers 0.000 description 5
- 239000004641 Diallyl-phthalate Substances 0.000 description 4
- RWCCWEUUXYIKHB-UHFFFAOYSA-N benzophenone Chemical group C=1C=CC=CC=1C(=O)C1=CC=CC=C1 RWCCWEUUXYIKHB-UHFFFAOYSA-N 0.000 description 4
- GGCZERPQGJTIQP-UHFFFAOYSA-N sodium;9,10-dioxoanthracene-2-sulfonic acid Chemical compound [Na+].C1=CC=C2C(=O)C3=CC(S(=O)(=O)O)=CC=C3C(=O)C2=C1 GGCZERPQGJTIQP-UHFFFAOYSA-N 0.000 description 4
- 239000012790 adhesive layer Substances 0.000 description 3
- QUDWYFHPNIMBFC-UHFFFAOYSA-N bis(prop-2-enyl) benzene-1,2-dicarboxylate Chemical compound C=CCOC(=O)C1=CC=CC=C1C(=O)OCC=C QUDWYFHPNIMBFC-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- HCLJOFJIQIJXHS-UHFFFAOYSA-N 2-[2-[2-(2-prop-2-enoyloxyethoxy)ethoxy]ethoxy]ethyl prop-2-enoate Chemical compound C=CC(=O)OCCOCCOCCOCCOC(=O)C=C HCLJOFJIQIJXHS-UHFFFAOYSA-N 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- LNBZWBNYIKPDFQ-UHFFFAOYSA-N [4,4-bis(diethylamino)cyclohexa-1,5-dien-1-yl]-phenylmethanone Chemical compound C1=CC(N(CC)CC)(N(CC)CC)CC=C1C(=O)C1=CC=CC=C1 LNBZWBNYIKPDFQ-UHFFFAOYSA-N 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000004040 coloring Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 229920002601 oligoester Polymers 0.000 description 2
- FDPIMTJIUBPUKL-UHFFFAOYSA-N pentan-3-one Chemical compound CCC(=O)CC FDPIMTJIUBPUKL-UHFFFAOYSA-N 0.000 description 2
- 229920006267 polyester film Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 238000000859 sublimation Methods 0.000 description 2
- 230000008022 sublimation Effects 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- XMLYCEVDHLAQEL-UHFFFAOYSA-N 2-hydroxy-2-methyl-1-phenylpropan-1-one Chemical group CC(C)(O)C(=O)C1=CC=CC=C1 XMLYCEVDHLAQEL-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004215 Carbon black (E152) Substances 0.000 description 1
- DAKWPKUUDNSNPN-UHFFFAOYSA-N Trimethylolpropane triacrylate Chemical compound C=CC(=O)OCC(CC)(COC(=O)C=C)COC(=O)C=C DAKWPKUUDNSNPN-UHFFFAOYSA-N 0.000 description 1
- MPIAGWXWVAHQBB-UHFFFAOYSA-N [3-prop-2-enoyloxy-2-[[3-prop-2-enoyloxy-2,2-bis(prop-2-enoyloxymethyl)propoxy]methyl]-2-(prop-2-enoyloxymethyl)propyl] prop-2-enoate Chemical compound C=CC(=O)OCC(COC(=O)C=C)(COC(=O)C=C)COCC(COC(=O)C=C)(COC(=O)C=C)COC(=O)C=C MPIAGWXWVAHQBB-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007646 gravure printing Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 230000005764 inhibitory process Effects 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000005453 ketone based solvent Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000007645 offset printing Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000003504 photosensitizing agent Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 238000000275 quality assurance Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000012719 thermal polymerization Methods 0.000 description 1
- 125000003944 tolyl group Chemical group 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Thermal Transfer Or Thermal Recording In General (AREA)
- Duplication Or Marking (AREA)
Abstract
Description
【発明の詳細な説明】
【0001】
【産業上の技術分野】本発明は,画像のデジタル情報に
基づき,版を用いないで画像を形成する方法に関する。
また,本発明は,印刷機による大量印刷に先だち,印刷
物の出来上りを検証するための校正用の画像,すなわち
,印刷物とよく近似した画像を形成するための方法に関
する。
【0002】
【従来の技術】従来より大量の印刷に先だち印刷物の品
質を予め予測あるいは品質の保証を提示するものとして
,校正機という印刷機による数枚の印刷物を印刷するこ
とが行われている。しかしながら,この印刷は,印刷機
を使用して行うため,印刷の技術に優れた熟練者と時間
とを要した。また,この校正機はスペースをとり,価格
も高く,もっと容易な方法が求められている。
【0003】このような要求から,印刷機によらないで
容易に校正用の画像を形成する方法が開発され用いられ
ている。このような方法としては,ネガ,ポジのフィル
ムを用い,可視光あるいは紫外光により銀塩あるいは光
硬化性の粘着層を化学変化させる等の方法で行われてい
る。
【0004】しかしながら,銀塩を用いる印画紙法では
,印刷インキに用いられている顔料の色と銀塩による染
料の発色とで生じる色の違いや質感が,校正用の画像と
しては受け入れられないこともあり,校正用の画像とし
ては十分な品質とはなりきれていない。また,銀塩を用
いる方式は,面倒な現像という行程があり,また,現像
剤の廃液処理を要するなど,必ずしも取扱の容易なもの
ともなっていないところがあった。さらに,銀塩を材料
とするためどうしても,ランニングコストが高くなると
いう問題があった。
【0005】また,光硬化性の粘着層を化学変化させ,
顔料を用いて作られた各色のトナ−を粘着部に付着させ
,それにより出来た各色のシ−トを重ね合わせて作る方
法は,広く用いられてはいるが,画像を形成する着色層
の厚みが印刷物よりも著しく厚いため印刷物との質感の
ずれが大きく,より印刷物に近いものを簡単に得る方法
が強く求められている。
【0006】また,これらは,ネガ,ポジのフィルムを
介して画像出しを行うものであり,例えば,コンピュ−
タ−画面上にて作成した画像を直接出力することは出来
なかった。このようなネガ,ポジのフィルムを介さない
でも直接校正用の画像を得る方法として,インクジェッ
トによる方法,昇華染料の転写フィルムあるいは熱溶融
性のワックスインキフィルム等を用いる方法,液体トナ
−あるいは乾式トナ−を用いる電子写真方法等が考案さ
れている。
【0007】しかしながら,インクジェットはインキの
色材が染料のため印刷インキに用いられている顔料との
色の違いが指摘される。昇華性染料を用いた方法もやは
り顔料との色の違いが指摘される。また、昇華性染料を
用いる方式では記録される受容シートは,ポリエステル
系の材料に限られるため印刷用紙がそのまま使用できな
い。熱溶融性のワックスインキを用いる感熱転写法では
,装置は安くて手ごろだが,画像の品質が昇華性染料を
用いた転写方式に較べると劣り,さらに高画質化が必要
とされる。液体トナ−あるいは乾式トナ−を用いる電子
写真方法は,解像度の高い画像が比較的はやく得られる
が,それでも印刷インキでの色の再現にはまだ十分至っ
ていない。
【0008】
【発明が解決しようとする課題】本発明は,デジタル画
像デ−タよりダイレクトに校正用の画像を得るもので,
しかも,印刷インキと同様の色および印刷インキと同様
の転写機構でインキを転移させ,校正印刷機にて印刷し
たと非常に近い品質の画像を得ようとするものである。
【0009】
【課題を解決するための手段】本発明は,支持層,光硬
化性インキ層,剥離層の少なくとも三層より構成される
インキシ−トの供給部,デジタル情報に基づいてレ−ザ
光を照射する露光部,インキシ−トの剥離層を剥離させ
る剥離部,レ−ザ光に露光されなかったインキシ−トの
インキを印刷用紙に転写する転写部,インキを転写した
あとのインキ層,支持層の巻取りを行う巻取り部,印刷
用紙に転写したインキを光硬化する後露光部よりなる機
構を印刷用紙を搬送する回転体の周囲に3以上設け,搬
送する印刷用紙に順次異なった色のインキを転写させ多
色の画像を形成する方法に関する。
【0010】本発明にてインキシ−トは,支持層,光硬
化性インキ層,剥離層の少なくとも三層より構成される
。支持層としては,光硬化したインキが接着するような
材料であり,光硬化性のインキを塗工するに十分な強度
を有した平滑なフィルムが好ましく,このようなフィル
ムとしてはポリエステルフィルムが使用される。また,
インキ層を通過したレ−ザを反射してインキ層に戻し,
効率のよい光硬化を行うため,アルミ蒸着を施したフィ
ルムを使用出来る。
【0011】また,光硬化性のインキ層としては,減色
混合の三原色として適したプロセスインキ用の顔料,あ
るいは,プロセスインキで表現できない特色のための顔
料,必要に応じ染料と,熱可塑性の樹脂,紫外線硬化性
のモノマ−,オリゴマ−,ケトン溶剤,炭化水素系溶剤
,分散剤,光開始剤,光増感剤,必要に応じ熱重合禁止
剤等の添加剤からなるインキを0.5−5μの厚さにな
るように塗工,乾燥した層からなる。このインキ層は,
レ−ザによる照射を受けるまでは付着性の層であり,レ
−ザの照射により照射部が硬化する。そして,硬化部は
支持層に固着し印刷用紙への付着性が消失する。
また,レーザの未照射部は,付着性を保持しているので
印刷用紙に転写する。
【0012】剥離層は,光硬化性インキの支持層への塗
工,乾燥の直後にインキ面へラミネ−トするもので,イ
ンキ面の傷付きやゴミの付着などの汚れを防止するため
の保護をし,レ−ザの照射においては,光硬化時の酸素
の阻害も防ぐ働きをする。剥離層としては,レ−ザ照射
の直後に光硬化性のインキ面より容易に剥離する材料で
あり,透明性のよいポリエチレンフィルム,剥離処理を
予め設けたポリエステルフィルム等が用いられる。
【0013】このインキシ−トは,一定の大きさにカッ
トして供給してもよいがロ−ル状にして連続的に供給す
ることが好ましい。
【0014】レ−ザ光を照射する露光部は,レ−ザ本体
とレ−ザ光を制御する機構からなり,インキシ−トの流
れ方向に対して直角になるようにレ−ザ光を走査させる
。レ−ザの照射は,ネガ部を対象とし反転を考慮したデ
ジタルデ−タに基づいて行う。
【0015】また,レ−ザの照射は,インキシ−トの流
れに伴い生じる振動にて照射位置のぶれをなくすため鏡
面状の回転ドラムにインキシ−トを接触させながら行う
ことが好ましい。鏡面状の回転ドラムは,インキシ−ト
の支持層が透明の材料からなっているとき,インキシ−
トを通過するレ−ザの光を鏡面にて反射し光硬化が効率
よく行えるようにするものである。なお,支持層がアル
ミ蒸着層からなっているときは鏡面でなくともよい。
【0016】レ−ザ光を照射したのち,インキの転写を
行うまでに,剥離層をインキ面より剥離する。剥離の速
度は印刷用紙へのインキの転写と同機して行う。インキ
シ−トのインキを転写する転写部は,熱圧ロ−ルにて構
成される。ロールニップ間の好ましい温度は,70−1
30c,圧力は,3−8kgf/cmである。インキシ
−トの支持層とインキ層は転写速度と同機して巻取り部
に巻取る。また、インキの転写した印刷用紙には,イン
キの硬化に必要なエネルギ−の紫外線を照射して,イン
キを定着させる。
【0017】このように構成された機構を,印刷用紙を
搬送する回転体の周囲に3ないし4以上設けて印刷用紙
に3ないし4回以上の転写を行い多色の画像を得る。な
お,各機構間には,印刷用紙の搬送に応じた時間のずれ
を補正するために,レ−ザ照射のタイミングをずらすか
,あるいは,レ−ザ照射を同時に行い,転写時のタイミ
ングをずらすかの方法をとる見当合わせの機構を設ける
。
【0018】本発明にて印刷用紙は,通常のオフセット
印刷,グラビア印刷等にて用いられるものであり、校正
印刷にて使用されると同等の用紙を対象としたものであ
る。用紙の供給は,ロ−ル状でもシ−ト状でもよい。印
刷用紙を搬送する回転体は,円筒状が用いられるが,長
楕円状でも用いることができる。円筒状の回転体におい
ては,円筒面に印刷用紙を巻き付け,円筒面を熱圧転写
時の共通圧胴として作動させる。
【0019】以下,本発明の画像形成方法について図面
を参照して説明する。図1は,本発明の画像形成方法の
概略側面図である。印刷用紙10を搬送する回転体11
の周囲に等間隔にインキシ−ト20の供給部2,デジタ
ル情報に基づいて,レ−ザ光を照射する照射部3,イン
キシート20のレーザ照射部の照射ぶれをなくすための
回転ドラム4,インキシ−ト20の剥離層23を剥離さ
せるために角度をつける剥離用の回転体6,剥離層を巻
取る巻取り部7,レ−ザ光に露光されなかったインキシ
−ト20のインキを印刷用紙10に転写する転写部5,
インキを転写したあとのインキ層22,支持層21の巻
取りを行う巻取り部8,印刷用紙10に転写したインキ
から見当合わせを行うための情報を読みだし,指示を出
すための見当合わせセンサー12,転写したインキを光
硬化する後露光部9よりなる機構(以下,これをインキ
シ−トユニットと称す)4ユニットを配置した。配置の
順序は、イエロ−,マゼンタ,シアン,ブラックの順に
配置した。しかしながら,画像の仕上がりに影響がでる
ので,印刷の刷り順に応じて色の変更もできる。このよ
うな変更について,本発明ではインキシ−トユニット3
0,40,50の交換にて容易に行える。
【0020】なお,レーザの照射は,剥離層23側より
行うほうが,レーザの同一エネルギーでは,地汚れが少
なく好ましいが,支持層21が透明であるときは,支持
層からでも照射が可能であり,この際はレーザと回転ド
ラム4との位置を逆にして用いることが出来る。しかし
ながら,形成される画像は正像となるため,デジタルデ
ータでの変換が必要となる。印刷用紙10を搬送する回
転体11に印刷用紙(ア−ト紙)の一部をピンバ−にて
固定し,画像のデジタル信号によるレ−ザ照射およびイ
ンキシ−トの同期した移動、それに伴って剥離層の剥離
を開始した。レ−ザ照射およびインキシ−ト,印刷用紙
の移動,搬送に同期して第2,第3,第4のユニットが
始動し,イエロ−,マゼンタ,シアン,ブラックが同一
印刷用紙に転写されて印刷用紙10上にカラ−画像が形
成さる。
【0021】
【作用】本発明にて,イエロ−,マゼンタ,シアン,ブ
ラックのインキシ−トを各機構にそれぞれ用い,各色に
応じたデジタル情報に基づいてレ−ザによる書き込みを
行い,未硬化インキの印刷用紙への転写および露光を繰
り返すと,使用するインキシ−トのインキが印刷インキ
とほぼ同様の色を有し,転写するインキの転移状態も印
刷インキの転移状態によく似た転移面となるため,校正
印刷機による印刷物に極めて近い画像が得られる。
【0022】
【実施例】
インキシ−トの製造
下記組成のインキ組成物をサンドミルによる分
散により製造した。
イエロ−インキ
リオノ−ルエロ−FG−1310(東
洋インキ製造製 顔料)
20部
熱可塑製樹脂(ジアリルフタレ−ト DAP
L 大阪曹達製)
30部
オリゴエステルアクリレ−ト(M−7100 東亜
合成製)
14部 ベンゾフ
ェノン
1部 エ
チルケトン
2.5部
メチルエチルケトン
60部
トルエン
10部
【0023】
マゼンタインキ
リオノ−ルレッド7BFG4412(
東洋インキ製造製 顔料)
18部
熱可塑製樹脂(バイロン300 東洋紡製
) 30部 テトラエチ
レングリコ−ルジアクリレ−ト 1
0部 トリメチロ−ルプロパントリアク
リレ−ト 10部
ベンゾフェノン
1部
2−ヒドロキシ−2−メチルプロピオフェノン
3部 メチルエチルケト
ン
60部 トルエン
10部 【0024】
シアンインキ
リオノ−ルブル−FG7330(東洋
インキ製造製 顔料)
20部
熱可塑製樹脂(ジアリルフタレ−ト DAPL
大阪酸素製)
30部
オリゴエステルアクリレ−ト(M−7100 東亜合
成製)
14部 ベンゾフェ
ノン
1部 4,
4−ビスジエチルアミノベンゾフェノン 2
.5部 メチルエチルケトン
55部 トルエン
15部 【0025】
ブラックインキ
三菱カ−ボンMA−7(三菱化成製
カ−ボンブラック)
10部
熱可塑製樹脂(ジアリルフタレ−ト イソダップ
分子量45000 大阪曹
達製) 22部
ジペンタエリスリトールヘキサアクリレート
15部 ベンゾフェノ
ン
1部 4,4
−ビスジエチルアミノベンゾフェノン 2.
5部 メチルエチルケトン
7
0部 トルエン
15部 【0026】上記各インキを用いて
支持層への塗工を行った。支持層としては,12μのポ
リエチレンテレフタレ−トフィルムを用い,上記インキ
を乾燥状態で1.8μとなるように塗工し乾燥を行った
。そして,80μのポリエチレンフィルムをラミネ−ト
し,支持層,光硬化性インキ層,剥離層からなる各色イ
ンキシ−トを製造した。これらのインキシートを使用し
,図1に示す装置において,印刷用紙10を搬送する回
転体11に印刷用紙(ア−ト紙)の一部をピンバ−にて
固定し,画像のデジタル信号によるレ−ザ照射およびイ
ンキシ−トの同期した移動、それに伴って剥離層の剥離
を開始した。レ−ザ照射およびインキシ−ト,印刷用紙
の移動,搬送に同期して第2,第3,第4のユニットが
始動し,イエロ−,マゼンタ,シアン,ブラックが同一
印刷用紙に転写されてカラ−画像が形成された。
【0027】
【発明の効果】本発明は、ネガ,ポジの写真フィルムを
介さないで,直接デジタルデ−タから校正印刷に匹敵す
る画像を形成するもので,校正印刷のような印刷技術者
がいなくとも容易に校正用の画像が形成出来る。またコ
ンピュ−タ−にて作成した画像デ−タや遠距離からの画
像デ−タであっても,校正印刷に匹敵する画像がこれに
て形成出来る。これは,従来のこの作業場からフィルム
レス化を押し進めまた,作業場所,環境を一変させる効
果を有している。また,本発明によれば,デジタルデー
タの変換により正像でも逆像でも任意に変換が可能であ
る。さらに,レーザの照射を剥離層側より行うため,照
射エネルギーが同じであるなら支持層からの照射よりも
地汚れの少ない転写が行える。本発明によれば,印刷用
紙を搬送する回転体の周囲にインキシートユニットを配
置し,連続して各色を転写するため簡便,迅速かつ安定
した高品質の画像が提供できる。
【0028】Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of forming an image based on digital information of the image without using a plate. The present invention also relates to a method for forming a proof image for verifying the finished product of printed matter, that is, an image that closely resembles the printed material, prior to mass printing by a printing machine. [0002] Conventionally, a printing machine called a proofing machine has been used to print several sheets of printed matter in order to predict the quality of the printed matter in advance or to provide quality assurance prior to printing a large quantity of printed matter. . However, since this printing was performed using a printing press, it required a skilled person with excellent printing technology and time. Additionally, this calibration machine takes up space and is expensive, so there is a need for an easier method. [0003] In response to these demands, methods have been developed and used to easily form images for proofing without using a printing machine. Such a method is carried out by using a negative or positive film and chemically changing a silver salt or a photocurable adhesive layer using visible light or ultraviolet light. However, in the photographic paper method using silver salt, the difference in color and texture caused by the color of the pigment used in the printing ink and the coloring of the dye produced by the silver salt makes it unacceptable as an image for proofing. For this reason, the quality of the image is not sufficient for use as a proofreading image. In addition, methods using silver salts involve a troublesome development process and require disposal of developer waste, so they are not necessarily easy to handle. Furthermore, since the material is silver salt, there is a problem of high running costs. [0005] Furthermore, by chemically changing the photocurable adhesive layer,
The method of applying toner of each color made using pigments to an adhesive part and overlapping the resulting sheets of each color is widely used, but it is difficult to form a colored layer that forms an image. Since the thickness is significantly thicker than printed matter, there is a large difference in texture from printed matter, and there is a strong need for a method to easily obtain something more similar to printed matter. [0006] Furthermore, these devices produce images through negative and positive films, and for example,
It was not possible to directly output images created on the computer screen. Methods for obtaining proof images directly without using negative or positive films include inkjet methods, methods using sublimation dye transfer films or heat-melting wax ink films, liquid toners or dry toners. An electrophotographic method using - has been devised. [0007] However, since the coloring material of inkjet ink is dye, it has been pointed out that the color is different from the pigment used in printing ink. It has also been pointed out that methods using sublimable dyes also differ in color from pigments. Furthermore, in the method using sublimable dyes, the receiving sheet used for recording is limited to polyester-based materials, so printing paper cannot be used as is. In the thermal transfer method using heat-melting wax ink, the equipment is cheap and affordable, but the quality of the image is inferior to that of the transfer method using sublimation dyes, and higher image quality is required. Although electrophotographic methods using liquid toner or dry toner can produce images with high resolution relatively quickly, they still cannot reproduce the colors well with printing inks. [Problems to be Solved by the Invention] The present invention obtains an image for proofreading directly from digital image data.
Moreover, the ink is transferred in the same color as the printing ink and by the same transfer mechanism as the printing ink, and an image of quality very similar to that printed by a proof printing machine is to be obtained. [Means for Solving the Problems] The present invention provides an ink supply unit composed of at least three layers: a support layer, a photocurable ink layer, and a release layer, and an ink supply unit that uses a laser beam based on digital information. An exposure part that irradiates light, a peeling part that peels off the ink release layer, a transfer part that transfers the ink from the ink that was not exposed to the laser beam onto the printing paper, and an ink layer after the ink has been transferred. , three or more mechanisms consisting of a winding section for winding up the support layer, and a post-exposure section for photocuring the ink transferred to the printing paper are provided around the rotating body that transports the printing paper, and the mechanism is sequentially changed to the printing paper being transported. The present invention relates to a method for forming multicolor images by transferring ink of different colors. [0010] In the present invention, the ink composition is composed of at least three layers: a support layer, a photocurable ink layer, and a release layer. The support layer is preferably a smooth film that is a material to which the photocured ink adheres and has sufficient strength to coat the photocurable ink. Polyester film is used as such a film. be done. Also,
The laser that has passed through the ink layer is reflected back to the ink layer.
For efficient photocuring, a film coated with aluminum vapor deposition can be used. [0011] The photocurable ink layer also includes pigments for process inks suitable as the three primary colors for subtractive color mixtures, pigments for special colors that cannot be expressed with process inks, dyes as necessary, and thermoplastic resins. , UV-curable monomers, oligomers, ketone solvents, hydrocarbon solvents, dispersants, photoinitiators, photosensitizers, and if necessary, thermal polymerization inhibitors and other additives. It consists of a layer that is coated and dried to a thickness of 5μ. This ink layer is
It remains an adhesive layer until it is irradiated with a laser, and the irradiated area is hardened by laser irradiation. Then, the cured portion adheres to the support layer and loses its adhesion to the printing paper. In addition, since the portion not irradiated with the laser retains adhesive properties, it is transferred to the printing paper. [0012] The release layer is a layer that is laminated onto the ink surface immediately after the photocurable ink is applied to the support layer and dried, and is used to prevent stains such as scratches and dirt on the ink surface. It protects the material and also prevents oxygen inhibition during photocuring during laser irradiation. The release layer is a material that is easily released from the photocurable ink surface immediately after laser irradiation, such as a highly transparent polyethylene film or a polyester film that has been previously subjected to release treatment. [0013] Although this ink may be supplied after being cut into a certain size, it is preferable to supply it continuously in the form of a roll. The exposure section that irradiates the laser beam consists of a laser main body and a mechanism for controlling the laser beam, and scans the laser beam at right angles to the flow direction of the ink. let Laser irradiation targets the negative area and is performed based on digital data that takes into account reversal. Furthermore, it is preferable that the laser irradiation be performed while the inkite is in contact with a mirror-like rotating drum in order to eliminate the blurring of the irradiation position due to vibrations caused by the flow of the inkite. A mirror-like rotating drum is used when the ink support layer is made of a transparent material.
The laser light passing through the mirror is reflected by the mirror surface, allowing efficient photocuring. Note that when the support layer is made of an aluminum vapor-deposited layer, it does not have to be a mirror surface. After irradiation with laser light and before ink transfer, a release layer is removed from the ink surface. The peeling speed is the same as the ink transfer to the printing paper. The transfer section that transfers the ink is composed of a hot pressure roll. The preferred temperature between the roll nips is 70-1
30c, the pressure is 3-8 kgf/cm. The ink support layer and the ink layer are wound onto a winding section at the same speed as the transfer speed. Further, the printing paper to which the ink has been transferred is irradiated with ultraviolet rays having the energy necessary to harden the ink, thereby fixing the ink. Three to four or more mechanisms configured as described above are provided around the rotating body that conveys the printing paper, and the transfer is performed on the printing paper three or four times or more to obtain a multicolor image. In addition, in order to compensate for the time difference due to the conveyance of printing paper, between each mechanism, the timing of laser irradiation is staggered, or the timing of laser irradiation is performed simultaneously and the timing of transfer is staggered. A registration mechanism that takes this method is provided. The printing paper used in the present invention is one used in ordinary offset printing, gravure printing, etc., and is intended to be paper equivalent to that used in proof printing. The paper may be supplied in roll or sheet form. The rotating body for conveying the printing paper is usually cylindrical, but it can also be oval. In a cylindrical rotating body, printing paper is wrapped around the cylindrical surface, and the cylindrical surface is operated as a common impression cylinder during thermopressure transfer. The image forming method of the present invention will be explained below with reference to the drawings. FIG. 1 is a schematic side view of the image forming method of the present invention. Rotating body 11 that conveys printing paper 10
A supply section 2 for supplying ink 20 at equal intervals around the ink sheet 20, an irradiation section 3 for irradiating laser light based on digital information, a rotating drum 4 for eliminating irradiation blurring of the laser irradiation section of the ink sheet 20, A rotating body 6 for peeling that is angled to peel off the peeling layer 23 of the ink 20, a winding unit 7 that winds up the peeling layer, and printing ink on the ink 20 that was not exposed to laser light. a transfer unit 5 that transfers onto the paper 10;
The ink layer 22 after the ink has been transferred, the winding unit 8 that winds up the support layer 21, and the registration sensor that reads information for registration from the ink transferred to the printing paper 10 and issues instructions. 12. Four units of a mechanism (hereinafter referred to as an ink unit) consisting of a post-exposure section 9 for photocuring the transferred ink were arranged. The order of arrangement was yellow, magenta, cyan, and black. However, since this affects the finish of the image, the colors can be changed depending on the order of printing. Regarding such changes, in the present invention, the ink unit 3
This can be easily done by exchanging 0, 40, 50. Note that it is preferable to irradiate the laser from the release layer 23 side because there is less scumming with the same laser energy, but if the support layer 21 is transparent, it is possible to irradiate from the support layer as well. In this case, the positions of the laser and the rotating drum 4 can be reversed. However, since the image formed is a normal image, it is necessary to convert it into digital data. A part of the printing paper (art paper) is fixed with a pin bar to the rotary body 11 that conveys the printing paper 10, and the laser irradiation and the synchronized movement of the ink according to the digital signal of the image are performed. Peeling of the release layer was started. The second, third, and fourth units start in synchronization with laser irradiation, ink, and movement and conveyance of the printing paper, and yellow, magenta, cyan, and black are transferred to the same printing paper and printed. A color image is formed on paper 10. [Operation] In the present invention, yellow, magenta, cyan, and black inks are used in each mechanism, and writing is performed with a laser based on digital information corresponding to each color, and the uncured ink is When the ink is transferred onto printing paper and exposed to light repeatedly, the ink used has almost the same color as the printing ink, and the transferred ink has a transfer surface similar to that of the printing ink. Therefore, it is possible to obtain an image that is extremely similar to the print produced by the proof printing machine. [Example] Manufacture of ink composition An ink composition having the following composition was manufactured by dispersion using a sand mill. Yellow ink Lionor Elo-FG-1310 (Pigment manufactured by Toyo Ink Manufacturing)
20 copies
Thermoplastic resin (diallyl phthalate DAP)
L manufactured by Osaka Soda)
30 copies
Oligoester acrylate (M-7100 manufactured by Toagosei)
Part 14 Benzophenone
Part 1 Ethyl ketone
2.5 parts
Methyl ethyl ketone
60 copies
toluene
10 copies
Magenta ink Lionor Red 7BFG4412 (
Toyo Ink Manufacturing Pigment)
18 parts
Thermoplastic resin (Vylon 300 manufactured by Toyobo) 30 parts Tetraethylene glycol diacrylate 1
0 parts Trimethylolpropane triacrylate 10 parts
benzophenone
Part 1
2-Hydroxy-2-methylpropiophenone
Part 3 Methyl ethyl ketone
60 parts toluene
10 parts Cyan ink Lionor Blue-FG7330 (pigment manufactured by Toyo Ink Manufacturing Co., Ltd.)
20 copies
Thermoplastic resin (diallyl phthalate DAPL)
Made by Osaka Sanso)
30 copies
Oligoester acrylate (M-7100 manufactured by Toagosei)
Part 14 Benzophenone
Part 1 4,
4-bisdiethylaminobenzophenone 2
.. 5 parts Methyl ethyl ketone
55 parts toluene
Part 15 0025 Black ink Mitsubishi Carbon MA-7 (manufactured by Mitsubishi Kasei)
carbon black)
10 copies
Thermoplastic resin (diallyl phthalate isodap, molecular weight 45,000, manufactured by Osaka Soda) 22 parts
Dipentaerythritol hexaacrylate 15 parts Benzophenone
Part 1 4,4
-Bisdiethylaminobenzophenone 2.
5 parts Methyl ethyl ketone
7
0 parts toluene
15 parts Each of the above inks was used to coat the support layer. A polyethylene terephthalate film having a thickness of 12 .mu.m was used as the support layer, and the above ink was coated to a thickness of 1.8 .mu.m in a dry state and dried. Then, 80μ polyethylene films were laminated to produce ink sheets of various colors consisting of a support layer, a photocurable ink layer, and a release layer. Using these ink sheets, in the apparatus shown in Fig. 1, a part of the printing paper (art paper) is fixed with a pin bar to the rotary body 11 that conveys the printing paper 10, and a print is made using the digital signal of the image. - The laser irradiation and the synchronized movement of the ink, and the peeling of the release layer were started accordingly. The second, third, and fourth units are started in synchronization with the laser irradiation, ink, and movement and conveyance of the printing paper, and yellow, magenta, cyan, and black are transferred to the same printing paper, and the colors are transferred to the same printing paper. - An image has been formed. Effects of the Invention The present invention forms an image comparable to proof printing directly from digital data without using negative or positive photographic film, and eliminates the need for printing engineers to perform proof printing. At the very least, an image for proofreading can be easily formed. Furthermore, even if the image data is created using a computer or image data taken from a long distance, an image comparable to proof printing can be formed using this method. This has the effect of pushing the traditional workplace to filmless and completely changing the work place and environment. Further, according to the present invention, it is possible to arbitrarily convert a normal image or a reverse image by converting digital data. Furthermore, since laser irradiation is performed from the release layer side, it is possible to perform transfer with less background smudge than when irradiation from the support layer is performed with the same irradiation energy. According to the present invention, the ink sheet unit is arranged around the rotating body that conveys the printing paper, and each color is transferred continuously, so that it is possible to provide a simple, quick, and stable high-quality image. [0028]
【図1】図1は、本発明の概略側面図である。FIG. 1 is a schematic side view of the invention.
1 第1インキシートユニット
2 インキシート供給部
3 レーザ照射部
4 回転ドラム
5 転写部
6 剥離層用回転体
7 剥離層の巻取り部
8 支持層(インキ層の残った)の巻取り部9 後
露光部
10 印刷用紙
11 印刷用紙を搬送する回転体
12 見当合わせセンサー
20 インキシート
21 支持層
22 インキ層
23 インキシートの剥離層
30 第2インキシートユニット 40 第3イ
ンキシートユニット
50 第4インキシートユニット1 First ink sheet unit 2 Ink sheet supply section 3 Laser irradiation section 4 Rotating drum 5 Transfer section 6 Release layer rotating body 7 Release layer winding section 8 Support layer (ink layer remaining) winding section 9 Back Exposure section 10 Printing paper 11 Rotating body 12 for conveying printing paper Registration sensor 20 Ink sheet 21 Support layer 22 Ink layer 23 Peeling layer of ink sheet 30 Second ink sheet unit 40 Third ink sheet unit 50 Fourth ink sheet unit
Claims (2)
くとも三層より構成されるインキシ−トの供給部,デジ
タル情報に基づいてレ−ザ光を照射する露光部,インキ
シ−トの剥離層を剥離させる剥離部,レ−ザ光に露光さ
れなかったインキシ−トのインキを印刷用紙に転写する
転写部,インキを転写したあとのインキ層,支持層の巻
取りを行う巻取り部,印刷用紙に転写したインキを光硬
化する後露光部よりなる機構を印刷用紙を搬送する回転
体の周囲に3以上設け,搬送する印刷用紙に順次異なっ
た色のインキを転写させ多色の画像を形成する方法。Claim 1: An ink supply section consisting of at least three layers: a support layer, a photocurable ink layer, and a release layer; an exposure section that irradiates laser light based on digital information; A peeling section that peels off the release layer, a transfer section that transfers the ink that was not exposed to the laser beam onto the printing paper, a winding section that winds up the ink layer and support layer after the ink has been transferred. , a mechanism consisting of three or more post-exposure sections for photo-curing the ink transferred to the printing paper is provided around the rotating body that transports the printing paper, and ink of different colors is sequentially transferred to the printing paper being transported to create a multicolor image. How to form.
印刷用紙に転写する転写部が70−130c ,3−8
kgf/cmの転写条件である請求項1項記載の方法。[Claim 2] A transfer unit that transfers the ink portion not exposed to the laser beam to the printing paper is 70-130c, 3-8.
The method according to claim 1, wherein the transfer conditions are kgf/cm.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3038025A JPH04270660A (en) | 1991-02-07 | 1991-02-07 | Image forming method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3038025A JPH04270660A (en) | 1991-02-07 | 1991-02-07 | Image forming method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH04270660A true JPH04270660A (en) | 1992-09-28 |
Family
ID=12514028
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3038025A Pending JPH04270660A (en) | 1991-02-07 | 1991-02-07 | Image forming method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH04270660A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19703559A1 (en) * | 1997-01-31 | 1998-08-06 | Heidelberger Druckmasch Ag | Electrophotographic colour printer |
-
1991
- 1991-02-07 JP JP3038025A patent/JPH04270660A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19703559A1 (en) * | 1997-01-31 | 1998-08-06 | Heidelberger Druckmasch Ag | Electrophotographic colour printer |
DE19703559B4 (en) * | 1997-01-31 | 2007-06-06 | Eastman Kodak Co. | Method and device for applying toner to a substrate by means of a printing machine |
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