EP0000552A1 - Procédé de préparation d'une reproduction photographique d'un original, destinée à la confection d'une forme d'impression offset non tramée - Google Patents

Procédé de préparation d'une reproduction photographique d'un original, destinée à la confection d'une forme d'impression offset non tramée Download PDF

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Publication number
EP0000552A1
EP0000552A1 EP78100453A EP78100453A EP0000552A1 EP 0000552 A1 EP0000552 A1 EP 0000552A1 EP 78100453 A EP78100453 A EP 78100453A EP 78100453 A EP78100453 A EP 78100453A EP 0000552 A1 EP0000552 A1 EP 0000552A1
Authority
EP
European Patent Office
Prior art keywords
original
fine
producing
photographic
light
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
EP78100453A
Other languages
German (de)
English (en)
Inventor
Hans Ernst Müller
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.)
Licht Druck AG
Original Assignee
Licht Druck AG
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 Licht Druck AG filed Critical Licht Druck AG
Publication of EP0000552A1 publication Critical patent/EP0000552A1/fr
Ceased legal-status Critical Current

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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
    • G03F5/00—Screening processes; Screens therefor
    • 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
    • G03F5/00—Screening processes; Screens therefor
    • G03F5/02—Screening processes; Screens therefor by projection methods
    • G03F5/12—Screening processes; Screens therefor by projection methods using other screens, e.g. granulated screen

Definitions

  • the present invention relates to a method for producing a photographic image of a template intended for producing a planographic printing form and is preferably suitable for producing offset printing forms.
  • Another method is known under the name "light printing” and works without the use of a grid for shades of gray.
  • a photosensitive gelatin layer is gradually hardened by incident light. Since the gelatin layer is mechanically unstable, only small editions can be printed at low speed with such plates. Furthermore, the water absorption of the gelatin can change during the printing process, so that color value shifts can occur.
  • the purpose of the invention is to remedy these disadvantages.
  • the invention as characterized in the claims, achieves the object of a method for producing a photograph from a template intended for the production of a rasterless planographic printing form. create,
  • planographic printing form in which a planographic printing form can be produced from a template without using a grid, with which prints of great fidelity to the original can be produced.
  • a film positive or negative is produced from the template to be printed in a manner already known.
  • a translucent copy of the grain of a fine-grained material is switched into the beam path between the positive or negative film and the photographic material.
  • the template is made in a known manner, e.g. by means of the contact copying process, a photograph is made through this copy of the grain of the fine-grained material on the photographic recording material.
  • a fine-grained material such as asphalt, dispersion, dust powder is applied to a translucent base, for example a glass plate.
  • Asphalt is preferably used as the fine-grained material, as is already used in the known photochromic process.
  • the grain of the fine-grained material, or of the asphalt, is copied onto a light-sensitive material, for example onto film. This copying is advantageously carried out using the contact copying method.
  • planographic printing plate for example offset printing plate, is now produced in a conventional manner from the photographic negative or positive image of the original produced in the manner described.
  • the use of the described copy of the Grain of asphalt or other suitable fine-grained material en allows the production of a printing form, the accurate and tone quality of an original ER öglicht m.
  • the method according to the invention is therefore particularly suitable for the production of facsimile prints in which the exact and fine reproduction of the detailed drawing of the original is important.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Printing Methods (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
EP78100453A 1977-07-25 1978-07-20 Procédé de préparation d'une reproduction photographique d'un original, destinée à la confection d'une forme d'impression offset non tramée Ceased EP0000552A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH918777A CH617779A5 (fr) 1977-07-25 1977-07-25
CH9187/77 1977-07-25

Publications (1)

Publication Number Publication Date
EP0000552A1 true EP0000552A1 (fr) 1979-02-07

Family

ID=4349284

Family Applications (1)

Application Number Title Priority Date Filing Date
EP78100453A Ceased EP0000552A1 (fr) 1977-07-25 1978-07-20 Procédé de préparation d'une reproduction photographique d'un original, destinée à la confection d'une forme d'impression offset non tramée

Country Status (2)

Country Link
EP (1) EP0000552A1 (fr)
CH (1) CH617779A5 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0057734A1 (fr) * 1981-02-05 1982-08-18 Licht Druck AG. Procédé pour la production d'une trame granulée
US6406833B1 (en) * 1994-07-13 2002-06-18 Jean-Marie Nouel Use of frequency-modulated screening for lightening offset printing surfaces

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR481156A (fr) * 1916-03-10 1916-11-08 Gustave Nahrath Écran pour préparer des planches à imprimer
US1948604A (en) * 1929-05-27 1934-02-27 Firm Dr Bekk & Kaulen Chem Fab Process for the photochemical production of forms or patterns for planographic printing
FR1475816A (fr) * 1966-02-18 1967-04-07 Nouvelle trame utilisable en photogravure
FR2026473A1 (fr) * 1968-12-18 1970-09-18 Rapoport Printing Corp

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR481156A (fr) * 1916-03-10 1916-11-08 Gustave Nahrath Écran pour préparer des planches à imprimer
US1948604A (en) * 1929-05-27 1934-02-27 Firm Dr Bekk & Kaulen Chem Fab Process for the photochemical production of forms or patterns for planographic printing
FR1475816A (fr) * 1966-02-18 1967-04-07 Nouvelle trame utilisable en photogravure
FR2026473A1 (fr) * 1968-12-18 1970-09-18 Rapoport Printing Corp

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0057734A1 (fr) * 1981-02-05 1982-08-18 Licht Druck AG. Procédé pour la production d'une trame granulée
EP0057734B1 (fr) * 1981-02-05 1985-12-18 Licht Druck AG. Procédé pour la production d'une trame granulée
US6406833B1 (en) * 1994-07-13 2002-06-18 Jean-Marie Nouel Use of frequency-modulated screening for lightening offset printing surfaces

Also Published As

Publication number Publication date
CH617779A5 (fr) 1980-06-13

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Legal Events

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

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): BE DE FR GB LU NL SE

17P Request for examination filed
STAA Information on the status of an ep patent application or granted ep patent

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18R Application refused

Effective date: 19810818

RIN1 Information on inventor provided before grant (corrected)

Inventor name: MUELLER, HANS ERNST