DE284071C - - Google Patents

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Publication number
DE284071C
DE284071C DENDAT284071D DE284071DA DE284071C DE 284071 C DE284071 C DE 284071C DE NDAT284071 D DENDAT284071 D DE NDAT284071D DE 284071D A DE284071D A DE 284071DA DE 284071 C DE284071 C DE 284071C
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DE
Germany
Prior art keywords
gelatin
heating
images
printing forms
production
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.)
Active
Application number
DENDAT284071D
Other languages
German (de)
Publication of DE284071C publication Critical patent/DE284071C/de
Active 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
    • G03F7/00—Photomechanical, e.g. photolithographic, production of textured or patterned surfaces, e.g. printing surfaces; Materials therefor, e.g. comprising photoresists; Apparatus specially adapted therefor
    • G03F7/004—Photosensitive materials
    • G03F7/06—Silver salts

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Photosensitive Polymer And Photoresist Processing (AREA)

Description

KAISERLICHESIMPERIAL

PATENTAMT.PATENT OFFICE.

Es ist bekannt, daß photographische Gelatinenegative, wenn sie unter Anwendung von Wärme getrocknet werden, unter gewissen Bedingungen eine Reliefbildung aufweisen (vgl. Liesegang, Photochem. Studien, Heft i, S. I4).It is known that photographic gelatin negatives, when they are dried with the application of heat, have a relief formation under certain conditions (cf. Liesegang, Photochem. Studies, Heft i, p. I 4 ).

Gegenstand der vorliegenden Erfindung ist die Anwendung dieser Eigenschaft der Silber-· gelatine zur Herstellung von Druckformen.The subject of the present invention is the application of this property of the silver · gelatine for the production of printing forms.

Es ist schon beschrieben worden, daß beim Kopieren eines Rasternegativs auf eine halogensilberhaltige Gelatineschicht eine druckfähige Platte entsteht, wenn man das Positiv in einem härtenden Entwickler, z. B. Pyro-It has already been described that when copying a halftone negative onto a halosilver-containing one Gelatin layer a printable plate is created when the positive is in a hardening developer, e.g. B. Pyro

*5 gallol, hervorruft und nach dem Fixieren, Wässern und Erhitzen mit Kaliumbichromatlösung tränkt und dem Lichte aussetzt. Es hat sich aber durch Versuche ergeben, daß die Gelatineschichten die Erhitzung, selbst* 5 gallol, evokes and after fixing, Soaking and heating with potassium dichromate solution soaks and exposes to light. It But experiments have shown that the gelatin layers do the heating themselves

ao wenn sie mit Pyrogallol entwickelt waren, nicht aushalten, ohne zusammenzulaufen. Dies wird aber vermieden, wenn man nach der Erfindung die Gelatineschicht vor dem Erhitzen z. B. mit· Formalin härtet und unter Anwendung starker Wärme, etwa durch Auflegen auf eine 80 bis 150 ° heiße Metallplatte, schnell trocknet. ao if they were developed with pyrogallol, cannot stand without converging. But this is avoided if, according to the invention, the gelatin layer prior to heating z. B. hardens with · formalin and quickly dries using strong heat, for example by placing it on a metal plate at 80 to 150 ° C.

Dann erheben sich.' die positiven Rasterpunkte stark genug über die Bildfläche, um eine sofort druckfähige Platte zu liefern.Then get up. ' the positive halftone dots strong enough over the image area to to deliver an immediately printable plate.

Die beanspruchte Härtung ist zum schnellen Trocknen von solchen Bildern auch schon vorgeschlagen worden, aber nicht zur Herstellung von Druckformen.The claimed hardening is also already for the quick drying of such pictures has been proposed, but not for the production of printing forms.

Die Nachbehandlung mit Kaliumbichromatlösung kann dann wegfallen. Das Gelatinesilberbild kann durch Kopieren oder Kameraaufnahme mit oder ohne Raster erhalten worden sein.Post-treatment with potassium dichromate solution can then be omitted. The gelatin silver picture can be obtained by copying or camera recording with or without a grid have been.

Claims (1)

Patent-Anspruch:Patent claim: Verfahren zur photochemischen Herstellung von Druckformen aus entwickelten, fixierten, gewässerten und erhitzten Gelatinebildern, dadurch gekennzeichnet, daß die Bilder vor dem Erhitzen mit einem Gelatine härtenden Bad behandelt werden.Process for the photochemical production of printing forms from developed, fixed, watered and heated gelatin images, characterized in that the images with a gelatin hardening bath.
DENDAT284071D Active DE284071C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE284071T

Publications (1)

Publication Number Publication Date
DE284071C true DE284071C (en)

Family

ID=6049832

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DE (1) DE284071C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE746623C (en) * 1938-06-25 1944-08-16 Emil Baer Process for making screened colloid relief printing forms
DE2362005A1 (en) * 1972-12-15 1974-07-04 Nippon Paint Co Ltd METHOD OF WATERPROOF PHOTOPOLYMERIC PRINTING PLATES

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE746623C (en) * 1938-06-25 1944-08-16 Emil Baer Process for making screened colloid relief printing forms
DE2362005A1 (en) * 1972-12-15 1974-07-04 Nippon Paint Co Ltd METHOD OF WATERPROOF PHOTOPOLYMERIC PRINTING PLATES

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