DE425963C - Process for the production of printing forms on any base made of chromate gelatine - Google Patents
Process for the production of printing forms on any base made of chromate gelatineInfo
- Publication number
- DE425963C DE425963C DED47260D DED0047260D DE425963C DE 425963 C DE425963 C DE 425963C DE D47260 D DED47260 D DE D47260D DE D0047260 D DED0047260 D DE D0047260D DE 425963 C DE425963 C DE 425963C
- Authority
- DE
- Germany
- Prior art keywords
- parts
- exposed
- chromate
- gelatine
- 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.)
- Expired
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
- 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
- G03F7/04—Chromates
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
Description
Verfahren zur Herstellung von Druckformen auf beliebigen Unterlagen aus Chromatgelatine. Druckformen aus Chromatgelatine können nach bekannten Methoden dadurch hergestellt werden, daß eine auf einen beliebigen Träger als Unterlage gegossene Chromatgelatineschicht unter einem -Negativ der Einwirkung von Lichtstrahlen ausgesetzt und danach in verschiedener Weise nachbehandelt wird, so daß die durch Belichtung gehärteten Stellen eingefärbt und abgedruckt werden können.Process for the production of printing forms on any documents from chromate gelatin. Printing forms made from chromate gelatin can be produced using known methods be produced in that a cast on any carrier as a base Chromat gelatin layer under a negative exposed to the action of light rays and is then post-treated in various ways, so that the exposure hardened areas can be colored and printed.
Dabei besteht die Gefahr, daß bei den verschiedenen Lichtöffnungen innerhalb eines Negativs die feineren Lichtöffnungen des Negativs das Licht im Verhältnis nicht so stark durchlassen, daß eine Durchbelichtung der Gelatine bis auf den Grund erfolgen kann, ohne daß eine Überbelichtung anderer Partien des Druckstockes erfolgt. Die Folge ist, daß beim völligen Auswaschen der unbelichteten Gelatine bis auf den Grund diese belichteten Teile mit ausgewaschen werden.There is a risk that the various light openings inside a negative the finer light openings of the negative the light in proportion do not let through so strongly that the gelatine is exposed to the bottom can take place without overexposing other parts of the printing block. The result is that when the unexposed gelatin is completely washed out, except for the Reason these exposed parts are washed out with.
Diese Gefahr wird durch nachfolgendes Verfahren beseitigt: Eine derart belichtete Chromatgelatineschicht wird zunächst in lauwarmem Wasser, dessen Temperatur den Schmelzgrad der Gelatine übersteigt, etwa nur zur Hälfte und nur insoweit ausgewaschen, daß die durch das Licht gehärteten Teile erhaben stehen.This danger is eliminated by the following procedure: One such exposed chromate gelatin layer is first placed in lukewarm water, its temperature exceeds the degree of melting of the gelatine, about only half and only to the extent that it is washed out, that the parts hardened by the light are raised.
Daraufhin werden die unbelichteten Teile durch einen Überzug einer lichtundurchlässigen Schicht oder Masse dergestalt geschützt, daß das Eindringen des Lichtes in diese Teile verhindert wird. Dies kann entweder durch Überziehen der ganzen Platte mit einer Deckfarbe oder durch Einreiben mit Magnesia oder einem anderen lichtundurchlässigen Stoff geschehen, wonach die belichteten, erhaben stehenden Stellen mechanisch oder durch ein Lösungsmittel von diesem Überzuge befreit werden.Then the unexposed parts are covered by a opaque layer or mass protected in such a way that the penetration of light in these parts is prevented. This can be done either by overlaying it the whole plate with an overcoat or by rubbing with magnesia or a other opaque fabric happen, after which the exposed, raised standing These coatings can be removed from places mechanically or by means of a solvent.
Hiernach wird die ganze Platte einer erneuten Einwirkung des Lichtes so lange ausgesetzt, bis die Durchbelichtung der erhabenen Stellen bis auf die Unterlage erfolgt ist.After this the whole plate is subjected to renewed exposure to light Suspended until the raised areas are exposed to the surface is done.
Es lassen sich nunmehr ohne Verletzung der belichteten Stellen die unbelichteten Teile der Gelatine zusammen mit dem Deckmittel durch Weiterauswaschen entfernen.It can now be without damaging the exposed areas unexposed parts of the gelatin together with the opacifying agent by further washing out remove.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DED47260D DE425963C (en) | 1925-02-11 | 1925-02-11 | Process for the production of printing forms on any base made of chromate gelatine |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DED47260D DE425963C (en) | 1925-02-11 | 1925-02-11 | Process for the production of printing forms on any base made of chromate gelatine |
DED47260A DE1238888B (en) | 1965-05-14 | 1965-05-14 | Process for the production of more highly chlorinated alcohols |
Publications (1)
Publication Number | Publication Date |
---|---|
DE425963C true DE425963C (en) | 1926-03-02 |
Family
ID=25972125
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DED47260D Expired DE425963C (en) | 1925-02-11 | 1925-02-11 | Process for the production of printing forms on any base made of chromate gelatine |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE425963C (en) |
-
1925
- 1925-02-11 DE DED47260D patent/DE425963C/en not_active Expired
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