DE4119348A1 - Offset printing in moisture-free process - using water base dye binding to hydrophilic materials but not to hydrophobic materials, and conventional offset forme - Google Patents

Offset printing in moisture-free process - using water base dye binding to hydrophilic materials but not to hydrophobic materials, and conventional offset forme

Info

Publication number
DE4119348A1
DE4119348A1 DE4119348A DE4119348A DE4119348A1 DE 4119348 A1 DE4119348 A1 DE 4119348A1 DE 4119348 A DE4119348 A DE 4119348A DE 4119348 A DE4119348 A DE 4119348A DE 4119348 A1 DE4119348 A1 DE 4119348A1
Authority
DE
Germany
Prior art keywords
printing
offset printing
water
materials
moisture
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.)
Withdrawn
Application number
DE4119348A
Other languages
German (de)
Inventor
Wolfgang Dr Sc Nat Sobek
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LEIPZIG TECH HOCHSCHULE
Original Assignee
LEIPZIG TECH HOCHSCHULE
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
Application filed by LEIPZIG TECH HOCHSCHULE filed Critical LEIPZIG TECH HOCHSCHULE
Priority to DE4119348A priority Critical patent/DE4119348A1/en
Publication of DE4119348A1 publication Critical patent/DE4119348A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D11/00—Inks
    • C09D11/02—Printing inks
    • C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
    • 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
    • B41M1/06—Lithographic printing
    • B41M1/08—Dry printing

Abstract

The process uses a water-based printing ink binding to hydrophilic materials and a conventional offset printing form. The printing ink pref. comprises a dye, water, 5-50 (10-50)% of a water soluble macromolecular binder, and a hygroscopic organic liq. pref. a polyvalent alcohol. ADVANTAGE - The process is less costly and damages the environment less.

Description

Die Erfindung betrifft ein Offsetdruckverfahren und eine Druckfarbe für den feuchtelosen Offsetdruck.The invention relates to an offset printing method and a printing ink for moisture-free offset printing.

Bekannt sind Druckfarben für den konventionellen Offsetdruck, be­ stehend aus Pigment, Leinöl- bzw. Leinölfirnis und Additiven. Diese Druckfarben haften nach dem Feuchten einer Offsetdruckform auf den hydrophoben Bereichen der Druckform, aber nicht auf den hydrophilen Bereichen.Printing inks for conventional offset printing are known consisting of pigment, linseed oil or linseed oil varnish and additives. These Printing inks adhere to the surface after dampening an offset printing form hydrophobic areas of the printing form, but not on the hydrophilic Areas.

Weiterhin sind Druckfarben für den feuchtelosen Offsetdruck bekannt. Dazu werden Druckfarben auf Silikonölbasis und eine Silikondruck­ form verwendet. Die Nichtbildbereiche haben bei diesem Verfahren eine Oberflächenspannung, die von der der Druckfarbe so verschieden ist, daß die Druckfarbe nicht auf den Nichtbildbereichen haftet.Printing inks for moisture-free offset printing are also known. For this purpose, printing inks based on silicone oil and a silicone printing form used. The non-image areas have in this process a surface tension so different from that of the ink is that the ink does not adhere to the non-image areas.

Beim konventionellen Offsetdruck kommt es durch die Wechselwirkun­ gen zwischen Druckfarbe und Feuchtmittel zur Beeinträchtigung der Druckqualität, da diese Wechselwirkungen während des Druckprozes­ ses schwer zu beherrschen sind.In conventional offset printing, it comes through the interaction between ink and dampening solution to affect the Print quality because of these interactions during the printing process are difficult to control.

Diese Nachteile werden durch den feuchtelosen Offsetdruck ele­ miniert, wobei nachteilig ist, daß sowohl die Druckform als auch die Druckfarbe sehr teuer sind. Ferner sind die zur Herstellung der Druckform verwendeten Fotopolymere und Entwickler ebenso wie die Druckfarbe umweltbelastend.These disadvantages are ele due to the moisture-free offset printing mined, with the disadvantage that both the printing form and the printing inks are very expensive. Furthermore, they are for production the photopolymer and developer used in the printing form as well like the printing ink polluting the environment.

Der Erfindung liegt die Aufgabe zugrunde, eine konventionelle Offsetdruckform für den feuchtelosen Offsetdruck anzuwenden und eine Druckfarbe auf Wasserbasis für den feuchtelosen Offsetdruck zu finden, die auf hydrophilen Materialien haftet und auf hydro­ phoben Materialien nicht haftet. The invention has for its object a conventional To use offset printing form for wet offset printing and a water-based printing ink for moisture-free offset printing to find that adheres to hydrophilic materials and hydro phoben materials is not liable.  

Diese Aufgabe wird erfindungsgemäß durch ein Verfahren dadurch gelöst, daß eine Druckfarbe auf Wasserbasis und eine konventio­ nelle Offsetdruckform verwendet wird. Die Druckfarbe muß dabei so beschaffen sein, daß sie auf hydrophilen Materialien haftet und auf hydrophoben Materialien nicht haftet. Dazu muß die Druck­ farbe eine Oberflächenspannung haben, die der der hydrophilen Materialien sehr ähnlich und möglichst deutlich größer der hydrophoben Materialien ist.According to the invention, this object is achieved by a method solved that a water-based ink and a konventio nelle offset printing form is used. The printing ink must be used be designed so that it adheres to hydrophilic materials and does not adhere to hydrophobic materials. This requires the pressure color have a surface tension that that of the hydrophilic Materials very similar and as much larger as possible is hydrophobic materials.

Weiterhin wird die Aufgabe dadurch gelöst, daß die Druckfarbe ein wasserlösliches Polymer als Bindemittel und Wasser als Lösemittel enthält. Eine so zusammengesetzte Druckfarbe haftet z. B. auf der Aluminiumoxidschicht einer konventionellen Offset­ druckplatte und haftet nicht auf einer Howson Negativkopier­ schicht, auf einer im Wasser gequollenen PVA-Kopierschicht und auf Polyethylen.Furthermore, the object is achieved in that the printing ink a water-soluble polymer as a binder and water as Contains solvents. An ink composed in this way adheres e.g. B. on the aluminum oxide layer of a conventional offset printing plate and does not adhere to a Howson negative copy layer, on a PVA copying layer swollen in water and on Polyethylene.

Um die Oberflächenspannung der Druckfarbe zu modifizieren, wird der Druckfarbe ein mehrwertiger Alkohol zugegeben. Gleichzeitig stabilisiert sich dadurch die Viskosität der Druckfarbe, da die hygroskopische Flüssigkeit das in ihr enthaltene Wasser bindet.To modify the surface tension of the printing ink, added polyhydric alcohol to the printing ink. At the same time This stabilizes the viscosity of the printing ink, since the hygroscopic liquid that binds the water it contains.

Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin, daß die verwendete Druckform und Druckfarbe billiger und umweltverträglicher sind.The advantages achieved with the invention are in particular in that the printing form and printing ink used are cheaper and are more environmentally friendly.

Claims (2)

1. Offsetdruckverfahren für den feuchtelosen Offsetdruck, dadurch gekennzeichnet, daß
  • a) eine Druckfarbe auf Wasserbasis, die auf hydrophilen Mate­ rialien haftet und auf hydrophoben Materialien nicht haftet und
  • b) eine konventionelle Offsetdruckform verwendet wird.
1. Offset printing process for damp offset printing, characterized in that
  • a) a water-based ink that adheres to hydrophilic materials and does not adhere to hydrophobic materials and
  • b) a conventional offset printing form is used.
2. Druckfarbe für den feuchtelosen Offsetdruck, dadurch gekenn­ zeichnet, daß die Druckfarbe
  • 1. Farbstoff,
  • 2. Wasser,
  • 3. 5-50% wasserlösliches makromolekulares Bindemittel,
    • 3.1. vorzugsweise 10-50% wasserlösliches makromolekulares Bindemitel und
  • 4. eine hygroskopische organische Flüssissigkeit
    • 4.1. vorzugsweise einen mehrwertigen Alkohol enthält.
2. Printing ink for moisture-free offset printing, characterized in that the printing ink
  • 1. dye,
  • 2. water,
  • 3. 5-50% water-soluble macromolecular binder,
    • 3.1. preferably 10-50% water soluble macromolecular binder and
  • 4. a hygroscopic organic liquid
    • 4.1. preferably contains a polyhydric alcohol.
DE4119348A 1991-06-12 1991-06-12 Offset printing in moisture-free process - using water base dye binding to hydrophilic materials but not to hydrophobic materials, and conventional offset forme Withdrawn DE4119348A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4119348A DE4119348A1 (en) 1991-06-12 1991-06-12 Offset printing in moisture-free process - using water base dye binding to hydrophilic materials but not to hydrophobic materials, and conventional offset forme

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE4119348A DE4119348A1 (en) 1991-06-12 1991-06-12 Offset printing in moisture-free process - using water base dye binding to hydrophilic materials but not to hydrophobic materials, and conventional offset forme

Publications (1)

Publication Number Publication Date
DE4119348A1 true DE4119348A1 (en) 1992-12-17

Family

ID=6433764

Family Applications (1)

Application Number Title Priority Date Filing Date
DE4119348A Withdrawn DE4119348A1 (en) 1991-06-12 1991-06-12 Offset printing in moisture-free process - using water base dye binding to hydrophilic materials but not to hydrophobic materials, and conventional offset forme

Country Status (1)

Country Link
DE (1) DE4119348A1 (en)

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5725646A (en) * 1996-03-13 1998-03-10 Sun Chemical Corporation Water-based offset lithographic printing ink
US5758580A (en) * 1996-03-13 1998-06-02 Heidelberger Druckmaschinen Ag Printing unit using various ink types
US5778789A (en) * 1996-03-13 1998-07-14 Sun Chemical Offset lithographic printing process with a water based ink
US5972088A (en) * 1996-03-13 1999-10-26 Sun Chemical Corporation Water-based gravure printing ink
US6209456B1 (en) 1996-03-13 2001-04-03 Heidelberger Druckmaschinen Ag Web- and sheet-fed printing unit using various ink types, particularly water-based inks
US6444022B1 (en) 2000-05-20 2002-09-03 Sun Chemical Corporation Water based offset lithographic printing ink
US6709503B1 (en) 2002-12-19 2004-03-23 Sun Chemical Corporation Waterbased heatset offset ink compositions
DE10065481B4 (en) * 1999-12-28 2006-09-07 Ricoh Printing Systems, Ltd. Printing method, printing plate and printing machine in which the printing plate is used
US7429292B2 (en) 2006-06-15 2008-09-30 Sun Chemical Corporation Water washable lithographic printing ink
EP3053751A1 (en) * 2015-01-05 2016-08-10 Institute of Chemistry, Chinese Academy of Sciences A planographic printing system and a planographic printing method
WO2019038596A1 (en) * 2017-08-19 2019-02-28 Hescoat GmbH Printing system
CN113306319A (en) * 2021-07-14 2021-08-27 北京印刷学院 Method for aqueous ink offset lithographic printing

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5725646A (en) * 1996-03-13 1998-03-10 Sun Chemical Corporation Water-based offset lithographic printing ink
US5758580A (en) * 1996-03-13 1998-06-02 Heidelberger Druckmaschinen Ag Printing unit using various ink types
US5778789A (en) * 1996-03-13 1998-07-14 Sun Chemical Offset lithographic printing process with a water based ink
US5972088A (en) * 1996-03-13 1999-10-26 Sun Chemical Corporation Water-based gravure printing ink
US6209456B1 (en) 1996-03-13 2001-04-03 Heidelberger Druckmaschinen Ag Web- and sheet-fed printing unit using various ink types, particularly water-based inks
DE10065481B4 (en) * 1999-12-28 2006-09-07 Ricoh Printing Systems, Ltd. Printing method, printing plate and printing machine in which the printing plate is used
US6444022B1 (en) 2000-05-20 2002-09-03 Sun Chemical Corporation Water based offset lithographic printing ink
US6709503B1 (en) 2002-12-19 2004-03-23 Sun Chemical Corporation Waterbased heatset offset ink compositions
US7429292B2 (en) 2006-06-15 2008-09-30 Sun Chemical Corporation Water washable lithographic printing ink
EP3053751A1 (en) * 2015-01-05 2016-08-10 Institute of Chemistry, Chinese Academy of Sciences A planographic printing system and a planographic printing method
WO2019038596A1 (en) * 2017-08-19 2019-02-28 Hescoat GmbH Printing system
CN113306319A (en) * 2021-07-14 2021-08-27 北京印刷学院 Method for aqueous ink offset lithographic printing

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8139 Disposal/non-payment of the annual fee