HK1205067A1 - Printing method with oxidative drying intaglio ink and uv vis curable intaglio inks - Google Patents

Printing method with oxidative drying intaglio ink and uv vis curable intaglio inks

Info

Publication number
HK1205067A1
HK1205067A1 HK15105444.4A HK15105444A HK1205067A1 HK 1205067 A1 HK1205067 A1 HK 1205067A1 HK 15105444 A HK15105444 A HK 15105444A HK 1205067 A1 HK1205067 A1 HK 1205067A1
Authority
HK
Hong Kong
Prior art keywords
intaglio
printing method
oxidative drying
inks
vis curable
Prior art date
Application number
HK15105444.4A
Other languages
English (en)
Chinese (zh)
Inventor
Pierre Degott
Patrick Magnin
Olivier Lefebvre
Christophe Schaller
Jean-Daniel Spitteler
Original Assignee
Sicpa Holding Sa
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=47846025&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=HK1205067(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Sicpa Holding Sa filed Critical Sicpa Holding Sa
Publication of HK1205067A1 publication Critical patent/HK1205067A1/xx

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/355—Security threads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F9/00—Rotary intaglio printing presses
    • B41F9/01—Rotary intaglio printing presses for indirect printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F9/00—Rotary intaglio printing presses
    • B41F9/02—Rotary intaglio printing presses for multicolour printing
    • B41F9/023—Web printing presses
    • B41F9/025—Web printing presses with horizontally arranged printing units
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M1/00—Inking and printing with a printer's forme
    • B41M1/10—Intaglio printing ; Gravure printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41M—PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; COLOUR PRINTING
    • B41M3/00—Printing processes to produce particular kinds of printed work, e.g. patterns
    • B41M3/14—Security printing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/20—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof characterised by a particular use or purpose
    • B42D25/29—Securities; Bank notes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/324—Reliefs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/351—Translucent or partly translucent parts, e.g. windows
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/30—Identification or security features, e.g. for preventing forgery
    • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
    • B42D25/378—Special inks
    • B42D25/387—Special inks absorbing or reflecting ultraviolet light
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
    • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
    • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
    • B42D25/40—Manufacture
    • B42D25/405—Marking

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Finance (AREA)
  • Manufacturing & Machinery (AREA)
  • Printing Methods (AREA)
  • Inks, Pencil-Leads, Or Crayons (AREA)
  • Rotary Presses (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Credit Cards Or The Like (AREA)
HK15105444.4A 2012-03-23 2015-06-08 Printing method with oxidative drying intaglio ink and uv vis curable intaglio inks HK1205067A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP12160940 2012-03-23
PCT/EP2013/054861 WO2013139636A1 (en) 2012-03-23 2013-03-11 Printing method with oxidative-drying intaglio ink and uv-vis-curable intaglio inks

Publications (1)

Publication Number Publication Date
HK1205067A1 true HK1205067A1 (en) 2015-12-11

Family

ID=47846025

Family Applications (1)

Application Number Title Priority Date Filing Date
HK15105444.4A HK1205067A1 (en) 2012-03-23 2015-06-08 Printing method with oxidative drying intaglio ink and uv vis curable intaglio inks

Country Status (26)

Country Link
US (2) US10611184B2 (de)
EP (1) EP2828090B2 (de)
JP (1) JP6209754B2 (de)
KR (1) KR102010110B1 (de)
CN (1) CN104203586B (de)
AR (1) AR090178A1 (de)
AU (1) AU2013234521B2 (de)
BR (1) BR112014021423B1 (de)
CA (1) CA2865041C (de)
CO (1) CO7071117A2 (de)
DK (1) DK2828090T3 (de)
ES (1) ES2586932T5 (de)
HK (1) HK1205067A1 (de)
HU (1) HUE030356T2 (de)
IN (1) IN2014DN07085A (de)
MA (1) MA37433B1 (de)
MX (1) MX2014011331A (de)
MY (1) MY170832A (de)
PH (1) PH12014501956B1 (de)
PL (1) PL2828090T3 (de)
PT (1) PT2828090T (de)
RS (1) RS54977B1 (de)
RU (1) RU2615969C2 (de)
TW (1) TWI576250B (de)
UA (1) UA114813C2 (de)
WO (1) WO2013139636A1 (de)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012010534A1 (de) * 2012-05-29 2013-12-05 Giesecke & Devrient Gmbh Verfahren zum Herstellen eines Wertdokuments
JP6021777B2 (ja) * 2013-09-30 2016-11-09 富士フイルム株式会社 成形加工方法、インモールド成形品の製造方法、及び、成形印刷物作製用加飾シート
CN107531067B (zh) * 2015-04-28 2020-04-17 锡克拜控股有限公司 用于湿法胶印方法的环境友好的润版液和湿法胶印方法
MA42906A (fr) * 2015-07-10 2018-05-16 De La Rue Int Ltd Procédé de fabrication d'un motif dans ou sur un support
GB201512120D0 (en) * 2015-07-10 2015-08-19 Rue De Int Ltd A method for producing a pattern in or on a support
CN107053823A (zh) * 2017-05-31 2017-08-18 浙江伟博包装印刷品有限公司 凹印机油墨气泡挤压装置
FR3071433A1 (fr) * 2017-09-22 2019-03-29 Ccl Secure Pty Ltd Procede d'impression pour des documents de securite
US11413804B2 (en) * 2018-02-06 2022-08-16 Xerox Corporation Method and apparatus for embossing a substrate
KR20230006513A (ko) * 2020-04-23 2023-01-10 시크파 홀딩 에스에이 가치 문서를 보호하기 위한 이색성 보안 특징을 제조하는 방법
DE102020120193A1 (de) 2020-07-30 2022-02-03 Bundesdruckerei Gmbh Verfahren und vorrichtung zum bedrucken eines substrats mit einer elektrolumineszenten druckfarbe sowie ausweis-, wert- oder sicherheitsdokuments umfassend ein solches substrat

Family Cites Families (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1395858A (fr) * 1964-03-06 1965-04-16 Publications Periodiques Sa Perfectionnements apportés aux procédés et machines d'impression en taille-douce et aux supports imprimés obtenus
GB1469717A (en) 1974-06-13 1977-04-06 Thailand Bank Of Printing inks
JPS52150112A (en) 1976-06-08 1977-12-13 Dainippon Ink & Chemicals Mat printing method
AU550695B2 (en) 1982-04-07 1986-03-27 De La Rue Giori S.A. Copperplate engraving machine for paper currency
CH674989A5 (de) * 1988-09-05 1990-08-15 Sicpa Holding Sa
DE69008941T2 (de) † 1989-06-29 1994-12-15 De La Rue Giori Sa Tiefdruckmaschine zum Drucken von Wertpapieren.
ATE128478T1 (de) * 1989-12-07 1995-10-15 Sicpa Holding Sa Hochreaktive druckfarben.
JP2726341B2 (ja) 1990-12-04 1998-03-11 住友ゴム工業 株式会社 印刷用オフセットブランケット
US5282417A (en) 1992-03-26 1994-02-01 De La Rue Giori S.A. Intaglio printing machine with direct and color-collect inking
DE4444034C2 (de) 1994-12-10 1997-07-03 4 P Folie Forchheim Gmbh Einrichtung zum Auftragen eines hochviskosen Mediums
CA2232695C (en) 1997-04-14 2005-02-01 De La Rue Giori S.A. Intaglio printing press
ES2193342T3 (es) 1997-12-29 2003-11-01 Sicpa Holding Sa Composicion de revestimiento, uso de particulas, metodo para etiquetar e identificar un documento de seguridad que comprende dicha composicion de revestimiento.
DE19845436C5 (de) * 1998-10-02 2015-02-26 Giesecke & Devrient Gmbh Stichtiefdruckverfahren zum Drucken von aneinander grenzenden Farbflächen unterschiedlicher Farbschichtdicke, Datenträger mit im Stichtiefdruckverfahren erzeugtem Druckbild, Druckplatte und Verfahren zum Herstellen einer Druckplatte
JP4212735B2 (ja) * 1999-10-13 2009-01-21 株式会社小森コーポレーション ワイピング液処理方法およびその装置
AUPQ417399A0 (en) 1999-11-22 1999-12-16 Note Printing Australia Limited Intaglio printing inks
AUPQ422999A0 (en) * 1999-11-24 1999-12-16 Note Printing Australia Limited Apparatus and method for uv curing of intaglio printing
EP1116755A1 (de) 2000-01-10 2001-07-18 Sicpa Holding S.A. Beschichtungszusammensetzung, bevorzugt Drucktinten für Anwendungen im Sicherheitsbereich, Verfahren zur Herstellung einer Beschichtungszusammensetzung und Verwendung von Glaskeramik
CN1234786C (zh) * 2000-11-16 2006-01-04 富士通株式会社 潜像用印刷油墨组合物、含用该油墨组合物记录的潜像的印刷物、利用潜像信息的辨读方法及潜像信息辨读装置
ATE332341T1 (de) 2001-05-21 2006-07-15 Sicpa Holding Sa Uv-härtbare tiefdrucktinte
WO2003066759A1 (fr) 2002-02-06 2003-08-14 National Printing Bureau, Incorporated Administrative Agency Composition d'encre pour impression en relief, et application correspondante
ATE423177T1 (de) 2004-04-01 2009-03-15 Sun Chemical Corp Photoinitiatoren zur verwendung in tiefdruckfarben
EP1602482A1 (de) 2004-06-03 2005-12-07 Kba-Giori S.A. Intaglio Druckmaschine mit Phasenzylindervorrichtung
SI1790701T2 (sl) * 2005-11-25 2012-05-31 Sicpa Holding Sa Ir absorbirajoča tiskarska barva za intaglio
US20070119320A1 (en) 2005-11-28 2007-05-31 Byers Joseph L Printing blanket having improved dynamic thickness stability
EP1842665A1 (de) * 2006-04-04 2007-10-10 Kba-Giori S.A. Verfahren zur Herstellung von Sicherheitspapieren, Tiefdruckmaschine zur Ausführung dieses Verfahren und Sicherheitsdokument herstellbar durch dieses Verfahren
EP1995062A1 (de) 2007-05-25 2008-11-26 Kba-Giori S.A. Tiefdruckpressensysteme zum beidseitigem Bedrucken von Bogen, insbesondere zur Herstellung von Banknoten und ähnlichen Wertdokumenten
WO2009003169A2 (en) 2007-06-27 2008-12-31 University Of Florida Research Foundation, Inc. Display-based interactive simulation with dynamic panorama
EP2014729A1 (de) 2007-07-09 2009-01-14 Sicpa Holding S.A. Intaglio-Druckfarbe mit Vanadium-Trocknungsmittel
WO2009013169A1 (en) * 2007-07-20 2009-01-29 Sicpa Holding S.A. Intaglio printing inks
US20090145314A1 (en) 2007-12-07 2009-06-11 Chemque, Inc. Intaglio Printing Methods, Apparatuses, and Printed or Coated Materials Made Therewith
JP5288345B2 (ja) 2008-03-19 2013-09-11 独立行政法人 国立印刷局 凹版印刷用インキ組成物及びそれを用いた印刷物
CN101250354B (zh) * 2008-03-26 2011-04-27 中国印钞造币总公司 一种uv─氧化混合干燥型雕刻凹印油墨
TWI444445B (zh) 2008-06-23 2014-07-11 Sicpa Holding Sa 包含樹枝狀聚合物之凹版印刷墨水
EP2159069A1 (de) 2008-08-29 2010-03-03 Kba-Giori S.A. Verfahren zum Lackieren von Sicherheitsdokumenten, insbesondere von Tiefdruck-Sicherheitsdokumenten wie Banknoten und Lackierungsmaschine zur Durchführung davon
CA2756927A1 (en) 2009-04-09 2010-10-14 Centre For Addiction And Mental Health Dopamine d2 receptor-disc1 interaction, compositions and methods for modulating same
JP2011068748A (ja) 2009-09-25 2011-04-07 National Printing Bureau 凹版印刷用インキ組成物及びそれを用いた印刷物
US9376579B2 (en) 2009-10-16 2016-06-28 National Printing Bureau, Incorporated Administrative Agency Intaglio printing ink
JP5501798B2 (ja) 2010-02-25 2014-05-28 住友ゴム工業株式会社 印刷ブランケット
JP2011173377A (ja) 2010-02-25 2011-09-08 Sumitomo Rubber Ind Ltd 印刷ブランケット
EP2635440B1 (de) 2010-11-02 2018-01-10 KBA-NotaSys SA Vorrichtung zur bestrahlung eines substratmaterials in form eines bogens oder einer bahn und verwendungen dafür

Also Published As

Publication number Publication date
RU2014139912A (ru) 2016-04-20
KR20140136490A (ko) 2014-11-28
EP2828090B2 (de) 2019-08-14
CA2865041C (en) 2019-10-08
JP6209754B2 (ja) 2017-10-11
PL2828090T3 (pl) 2016-12-30
HUE030356T2 (en) 2017-05-29
CN104203586B (zh) 2016-10-26
UA114813C2 (uk) 2017-08-10
CO7071117A2 (es) 2014-09-30
RS54977B1 (sr) 2016-11-30
AU2013234521B2 (en) 2015-09-24
US10611184B2 (en) 2020-04-07
EP2828090B1 (de) 2016-05-11
RU2615969C2 (ru) 2017-04-11
PH12014501956A1 (en) 2014-11-17
ES2586932T3 (es) 2016-10-19
US20200086676A1 (en) 2020-03-19
MA37433B1 (fr) 2016-02-29
PT2828090T (pt) 2016-07-27
AU2013234521A1 (en) 2014-09-11
TW201410487A (zh) 2014-03-16
US20150035268A1 (en) 2015-02-05
CN104203586A (zh) 2014-12-10
DK2828090T3 (en) 2016-08-22
ES2586932T5 (es) 2020-03-31
TWI576250B (zh) 2017-04-01
AR090178A1 (es) 2014-10-22
EP2828090B8 (de) 2016-09-07
EP2828090A1 (de) 2015-01-28
JP2015518432A (ja) 2015-07-02
US10703127B2 (en) 2020-07-07
CA2865041A1 (en) 2013-09-26
WO2013139636A1 (en) 2013-09-26
BR112014021423B1 (pt) 2021-03-23
MX2014011331A (es) 2014-12-05
MA20150067A1 (fr) 2015-02-27
KR102010110B1 (ko) 2019-08-12
IN2014DN07085A (de) 2015-04-10
MY170832A (en) 2019-09-05
PH12014501956B1 (en) 2014-11-17

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