EP0375733A1 - Production de cliches au moyen de supports lavables d'enregistrement d'images - Google Patents

Production de cliches au moyen de supports lavables d'enregistrement d'images

Info

Publication number
EP0375733A1
EP0375733A1 EP19880908162 EP88908162A EP0375733A1 EP 0375733 A1 EP0375733 A1 EP 0375733A1 EP 19880908162 EP19880908162 EP 19880908162 EP 88908162 A EP88908162 A EP 88908162A EP 0375733 A1 EP0375733 A1 EP 0375733A1
Authority
EP
European Patent Office
Prior art keywords
production
line
printing
light
template
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.)
Ceased
Application number
EP19880908162
Other languages
German (de)
English (en)
Inventor
Helma Meintz
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Linotype Hell AG
Dr Ing Rudolf Hell GmbH
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 Linotype Hell AG, Dr Ing Rudolf Hell GmbH filed Critical Linotype Hell AG
Publication of EP0375733A1 publication Critical patent/EP0375733A1/fr
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F1/00—Originals for photomechanical production of textured or patterned surfaces, e.g., masks, photo-masks, reticles; Mask blanks or pellicles therefor; Containers specially adapted therefor; Preparation thereof
    • G03F1/54—Absorbers, e.g. of opaque materials
    • G03F1/56—Organic absorbers, e.g. of photo-resists
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03F—PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES, e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTOR DEVICES; MATERIALS THEREFOR; ORIGINALS THEREFOR; APPARATUS SPECIALLY ADAPTED THEREFOR
    • G03F3/00—Colour separation; Correction of tonal value
    • G03F3/10—Checking the colour or tonal value of separation negatives or positives
    • G03F3/107—Checking the colour or tonal value of separation negatives or positives using silver halide photosensitive materials

Definitions

  • the present invention relates to a process for the production "of printing forms, in which an original artwork point and zeilen ⁇ is scanned opto-electronically, the scanning signals thereby obtained are converted into digital image signals, and the digital image signals, a light source to the point and line by line recording of the original on control a light-sensitive recording medium.
  • films or photographic material which have a strongly silver-containing emulsion layer, the development of the latent image being carried out using chemically aggressive agents which emit aggressive vapors and make it necessary to dispose of the used developer liquid, which as is known, is very hostile to the environment.
  • the present invention is therefore based on the objects of improving the image quality, simplifying the printing form production process and making the entire process more environmentally friendly.
  • the invention achieves this in that when recording the original on a light-sensitive recording medium by means of a light source, a recording medium is used which has a black (non-translucent) washable layer which is cured at the exposed areas and at the unexposed areas can be washed out, the layer being applied to a white carrier material which is resistant to washing out.
  • the washed-out recording material is used directly as a printing template for the production of the printing form, the white carrier material preferably being UV-transparent for the production of offset or gravure printing forms.
  • the production of offset printing forms takes place directly by exposing offset plates to UV light by means of a contact copy with the recording medium which has been exposed point by point and line by line from the light source.
  • the production of etched gravure forms takes place by exposing gravure forms coated with pre-screened pigment paper with UV light by means of a contact copy with the aforementioned master.
  • the production of screened low pressure molds takes place in that the aforementioned printing template serves as a scanning template for the engraving machine.
  • the recording material used for the printing template is characterized by the fact that it consists of white paper felt or the like coated on both sides, the coating consisting of transparent plastic and a black (non-translucent) washable layer on one of the coated sides of the material is applied, which is cured in the exposed areas and can be washed out in the unexposed areas, preferably using a coating which is sold under the name "Wolf", ie wash-off line film, by Dupont for the production of transparent film material is used.
  • a coating which is sold under the name "Wolf”, ie wash-off line film by Dupont for the production of transparent film material is used.
  • This layer is black in the unprocessed state and the image is created by a kind of subtractive method, ie unexposed parts are removed during the processing process.
  • the layer contains small amounts of silver, which is used for latency imaging. With this layer, excellent edge sharpness and optimal density can be achieved, and the layer can be processed by means of laser beams in the UV region of the spectrum and is therefore excellently suited as a recording medium for facsimile transmissions from newspaper pages or computer-to-plate technology in offset printing.
  • the emulsion layer contains very little silver and is a combination of gelatin with a black pigment of high concentration. Exposure forms a latent image in the emulsion layer.
  • the very low silver content of the emulsion layer is about 25% of the content of conventional emulsions for graphic films, but is not sufficient to produce a visible image through development.
  • the activator penetrates the protective layer in a special "Wolf" processor, releasing the tanning agent it contains into the emulsion layer. This sets in motion a crosslinking reaction, as a result of which the latent image areas harden and the black pigments are anchored in the gelatin.
  • the unexposed parts of the image are fixed in a known manner.
  • the pouring over and the gelatin with the unbound pigment are released from the unexposed parts of the image.
  • There are no gray parts of the image the pigment is either present or is not present, ie there are only completely blackened areas or non-blackened areas. Developers for such layers are sold commercially by Dupont.
  • the great advantage of the method according to the invention is, on the one hand, that the copying process from supervisory photo material to see-through film material is eliminated, and, on the other hand, that the loss of quality occurring in this copying process is avoided.
  • the quality loss that occurs is also avoided, since the exposure of the offset printing plate takes place in direct contact with the top material by UV light. Since the material is either completely blackened or not blackened, hard UV light can be used so that stains, cut edges or other contaminants or speckles are eliminated in the exposure process of the offset plate.
  • the emulsion layer used has only about a quarter of the silver content, and the development and fixation can be carried out using chemically less aggressive means.
  • Another advantage is that a recording medium produced in this way achieves about half the price of the previously customary graphic films, which in addition to saving the copying process or saving the repro camera, the costs of the method are significantly reduced.
  • Another advantage is that the printing form is produced directly from the "proof" that the customer has examined, so that the process for printing form production is simplified and the result examined by the customer is applied directly to the printing form.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)
  • Preparing Plates And Mask In Photomechanical Process (AREA)

Abstract

Selon un procédé de production de clichés, une source de lumière reproduit point par point et ligne par ligne un original sur un support d'enregistrement photosensible. On utilise comme support d'enregistrement un matériau qui comprend une couche noire (opaque à la lumière) lavable qui durcit aux endroits éclairés et peut être enlevée par lavage aux endroits non-éclairés. Cette couche est appliquée sur un substrat blanc transparent à la lumière aux rayons UV et résistant au lavage. On utilise le matériau d'enregistrement après son activation, fixation et lavage comme original servant à la production directe d'un cliché.
EP19880908162 1987-10-07 1988-10-07 Production de cliches au moyen de supports lavables d'enregistrement d'images Ceased EP0375733A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3733874 1987-10-07
DE19873733874 DE3733874A1 (de) 1987-10-07 1987-10-07 Druckformherstellung mittels auswaschbarem bildtraeger

Publications (1)

Publication Number Publication Date
EP0375733A1 true EP0375733A1 (fr) 1990-07-04

Family

ID=6337793

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19880908162 Ceased EP0375733A1 (fr) 1987-10-07 1988-10-07 Production de cliches au moyen de supports lavables d'enregistrement d'images

Country Status (4)

Country Link
EP (1) EP0375733A1 (fr)
JP (1) JPH03500215A (fr)
DE (1) DE3733874A1 (fr)
WO (1) WO1989003545A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT394634B (de) * 1989-12-20 1992-05-25 Raganitsch Gmbh Druckverfahren
DE4107762B4 (de) * 1990-03-09 2006-07-13 Dai Nippon Printing Co., Ltd. Verfahren zum Herstellen von Master- und Arbeitsmusterplatten für den Ätzprozess

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1094860A (fr) * 1976-06-10 1981-02-03 Raimund Faust Procede d'enregistrement d'images au moyen d'un rayon laser
JPS5815320B2 (ja) * 1976-10-19 1983-03-24 プロセス資材株式会社 熱記録材料および方法
JPS53120905A (en) * 1977-03-29 1978-10-21 Dainippon Printing Co Ltd Method of producing lithographic printing plate
US4225659A (en) * 1979-04-10 1980-09-30 Drexler Technology Corporation Method for making thermochromic photomasks
JPS5895348A (ja) * 1981-11-30 1983-06-06 Dainippon Screen Mfg Co Ltd 印刷版の製版方法
DE3232498A1 (de) * 1982-09-01 1984-03-01 Philips Patentverwaltung Gmbh, 2000 Hamburg Maske fuer die mustererzeugung in lackschichten mittels roentgenstrahllithographie und verfahren zu ihrer herstellung
US4515877A (en) * 1982-11-27 1985-05-07 Basf Aktiengesellschaft Image-recording materials and image-recording carried out using these to produce an optical mask
DE3435792A1 (de) * 1983-10-01 1985-04-18 Mitsubishi Paper Mills, Ltd., Tokio/Tokyo Verfahren zur herstellung von lithografischen druckplatten
EP0151191A1 (fr) * 1984-01-25 1985-08-14 American Hoechst Corporation Matériel photosensible pour la fabrication d'originaux
GB8425425D0 (en) * 1984-10-09 1984-11-14 Crosfield Electronics Ltd Radiation generation apparatus

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8903545A1 *

Also Published As

Publication number Publication date
DE3733874A1 (de) 1989-04-27
JPH03500215A (ja) 1991-01-17
WO1989003545A1 (fr) 1989-04-20

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Effective date: 19900331

AK Designated contracting states

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Designated state(s): CH DE FR GB IT LI

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: LINOTYPE-HELL AKTIENGESELLSCHAFT

17Q First examination report despatched

Effective date: 19920619

STAA Information on the status of an ep patent application or granted ep patent

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18R Application refused

Effective date: 19930801