AT52196B - Printing process. - Google Patents

Printing process.

Info

Publication number
AT52196B
AT52196B AT52196DA AT52196B AT 52196 B AT52196 B AT 52196B AT 52196D A AT52196D A AT 52196DA AT 52196 B AT52196 B AT 52196B
Authority
AT
Austria
Prior art keywords
plates
printing
nitric acid
printing process
rolled
Prior art date
Application number
Other languages
German (de)
Inventor
Max Ullmann
Original Assignee
Max Ullmann
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 Max Ullmann filed Critical Max Ullmann
Application granted granted Critical
Publication of AT52196B publication Critical patent/AT52196B/en

Links

Landscapes

  • Printing Plates And Materials Therefor (AREA)
  • ing And Chemical Polishing (AREA)

Description

  

   <Desc/Clms Page number 1> 
 



  Druckverfahren. 



   In einem früheren Patente Nr. 39186 ist ein Druckverfahren beschrieben zur direkten Bearbeitung von Druckplatten in der photographischen Kamera durch unmittelbare Belichtung in der Weise, dass in der Kamera die später zum Drucken verwendete Platte selbst hergestellt wird. 



   Es ist bereits bekannt, Metallplatten durch wiederholtes Ätzen herzustellen. Das Verfahren nach der Erfindung unterscheidet sich von den bekannten insbesondere dadurch, dass die Entwicklung und Ätzung der Platten gleichzeitig und wiederholt in einem Bade vorgenommen wird, und weiters dadurch, dass bei der fertigen Platte die unlösliche ChromGelatineschichte nicht entfernt wird. 



   Das neue Verfahren besteht darin, dass die Platten, nachdem sie gemäss des Stammpatentes bearbeitet und nach der erfolgten Belichtung hergestellt sind, mit Fettfarbe eingewalzt werden und alsdann einem zweiten Entwicklungsbade in verdünnter Salpetersäure ausgesetzt werden, um demnächst ein zweites Mal mit Fettfarbe eingewalzt zu werden. 



   Man ist durch diese Wiederholung des   Entwicklungsbades   in der Lage, die schärfsten Kopien zu erzielen. Als Ausführungsbeispiel für das zweite   Entwicklungsbad empfiehlt   sich ein solches aus 4%iger Salpetersäure. 

**WARNUNG** Ende DESC Feld kannt Anfang CLMS uberlappen**.



   <Desc / Clms Page number 1>
 



  Printing process.



   In an earlier patent no. 39186 a printing method is described for the direct processing of printing plates in the photographic camera by direct exposure in such a way that the plate itself which is later used for printing is produced in the camera.



   It is already known to manufacture metal plates by repeated etching. The method according to the invention differs from the known ones in particular in that the development and etching of the plates is carried out simultaneously and repeatedly in one bath, and further in that the insoluble chromium gelatin layer is not removed from the finished plate.



   The new process consists in the fact that the plates, after they have been processed according to the parent patent and after exposure, are rolled in with grease paint and then exposed to a second development bath in dilute nitric acid, in order to be rolled in with grease paint a second time.



   This repetition of the developing bath enables you to achieve the sharpest copies. A 4% nitric acid solution is recommended as an embodiment for the second developing bath.

** WARNING ** End of DESC field may overlap beginning of CLMS **.

Claims (1)

PATENT-ANSPRUCH : Verfahren zur Herstellung von Druckformen aus nach dem Verfahren nach Patent Nr. 39186 hergestellten Platten, dadurch gekennzeichnet, dass die Metallplatten nach erfolgtem Einwalzen mit der Farbe einer zweiten Entwicklung in einem an sich als Ätzmittel für Druckplatten bekannten Salpetersänrebad vorteilhaft aus 41""Salpetersäure ausgesetzt werden. **WARNUNG** Ende CLMS Feld Kannt Anfang DESC uberlappen**. PATENT CLAIM: Process for the production of printing forms from plates produced according to the method according to patent no. 39186, characterized in that the metal plates, after being rolled in with the color, are exposed to a second development in a nitric acid bath, known per se as an etching agent for printing plates, advantageously made of 41 "" nitric acid . ** WARNING ** End of CLMS field may overlap beginning of DESC **.
AT52196D 1908-07-09 1908-07-09 Printing process. AT52196B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT52196T 1908-07-09

Publications (1)

Publication Number Publication Date
AT52196B true AT52196B (en) 1912-02-10

Family

ID=3573286

Family Applications (1)

Application Number Title Priority Date Filing Date
AT52196D AT52196B (en) 1908-07-09 1908-07-09 Printing process.

Country Status (1)

Country Link
AT (1) AT52196B (en)

Similar Documents

Publication Publication Date Title
DE2914619C2 (en) Photosensitive mixture
DE1183919B (en) Method of making a presensitized planographic printing plate with a metallic base layer using an adhesive layer
AT96610B (en) Process for the production of fibrous cement boards.
AT52196B (en) Printing process.
DE1497130A1 (en) Method of washing electrophotographic plates
DE239807C (en)
DE1166217B (en) Planographic printing plate
DE2349899A1 (en) PRINT PLATE AND METHOD OF MANUFACTURING IT
AT55448B (en) Process for the photomechanical production of patterns using a resin layer between the base and the photosensitive layer.
DE615029C (en) Extraction processes, especially for color photography
AT53104B (en) Process for etching planographic printing forms made of iron.
AT28752B (en) Process for the production of photomechanical printing forms.
AT91513B (en) Process for the photomechanical production of etched printing forms.
DE461603C (en) Process for the production of photosensitive layers by means of diazo compounds
AT78943B (en) Process for reprocessing the washing water from nitrocellulose production.
AT108443B (en) Flat printing process.
AT31533B (en) Process for the production of a photographic paper or other image carrier suitable for projection copies.
DE939767C (en) Process for the wet treatment of combustion residues from steam boiler systems
AT257778B (en) Process for increasing the adhesive strength and resistance of paint layers
DE356381C (en) Process for the photographic production of patterns on glass, porcelain and the like. like
DE537740C (en) Process for etching printing plates made of aluminum or aluminum alloys
AT60190B (en) Process for the separation and separation of thorium from other rare earths.
AT111272B (en) Method of making sand molds for molding model plates.
AT60115B (en) Etch for planographic printing plates of metal.
DE376249C (en) Process for the production of light-sensitive layers in reproduction technology