DE598799C - Process for the production of durable bichromate colloid layers for photochemical purposes - Google Patents
Process for the production of durable bichromate colloid layers for photochemical purposesInfo
- Publication number
- DE598799C DE598799C DEM119947D DEM0119947D DE598799C DE 598799 C DE598799 C DE 598799C DE M119947 D DEM119947 D DE M119947D DE M0119947 D DEM0119947 D DE M0119947D DE 598799 C DE598799 C DE 598799C
- Authority
- DE
- Germany
- Prior art keywords
- bichromate
- durable
- production
- colloid layers
- photochemical
- 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
- G03C—PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES; PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY
- G03C1/00—Photosensitive materials
- G03C1/66—Compositions containing chromates as photosensitive substances
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Colloid Chemistry (AREA)
- Cosmetics (AREA)
Description
Verfahren zur Herstellung haltbarer Bichromatkolloidschichten für photochemische Zwecke Bekanntlich lassen sich die Bichromatprozesse bisher nur in der Weise ausführen, idaß man die Sensibilisierung von kolloiden Lösungen oder Kolloidschichten kurz vor der Verarbeitung vornimmt. Wollte man sie mit den Bichromaten zusammen lagern, so würde eine allgemeine Gerbungeintreten und eine spezifische- photochemische Wirkung ausbleiben.Process for the production of durable bichromate colloid layers for photochemical purposes It is well known that the bichromate processes can only be used in The way to do this is to sensitize colloidal solutions or colloid layers shortly before processing. If you wanted them together with the bichromats store a general tanning and a specific photochemical one No effect.
Es hat sich nun ergeben, daß man solche Präparationen von besserer Haltbarkeit herstellen kann, wenn man das Reduktionsvermögen der Schutzkolloide verringert, indem man sie mit Jodlösungen behandelt, so daß teilweise öder vollständige jodierung reintritt. Man erreicht dadurch, daß die so behandelte Gelatine usw. im Dunkeln mit Bichromaten viel langsamer reagiert, ohne deshalb ihre Lichtreaktivität zu verlieren.It has now been found that such preparations are better Durability can be achieved if one considers the reducing power of the protective colloids by treating them with iodine solutions so that they are partially or completely empty iodination steps in. It is achieved that the so treated gelatin, etc. in Dark reacts much more slowly with bichromates, without therefore reducing their light reactivity to lose.
Beispiel Eine 71/2%ige Gelatineläsung wird solange mit alkoholischer Jodlösung oder Jod-Jodkalilösung versetzt, bis man nahe an den Sättigungspunkt herankommt, der sich durch die jodstärkereaktion zu erkermen gibt. Man kann die Stärke zur Gelatine geben -und z. B. nach Eintreten der Blaufärbung etwas nicht oder schwächer jodierte Gelatine hinzufügen.Example A 71/2% gelatin solution is mixed with alcoholic Iodine solution or iodine-iodine potassium solution added until one comes close to the saturation point, who is noticeable through the iodine starch reaction. You can add the starch to gelatin give -and z. B. after the onset of the blue coloration something was not iodized or less iodized Add gelatin.
Die Lösung wird in bekannter Weise auf Papierfilme oder Platten gegossen, wobei man jodierte Lagen verschiedenen Alters übereinander anbringen kann. Der Guß wird dann in 2%iger Kalium-Bichromatlösung gebadet. Letztere kann je nach der Weiterverarbeitung, etwa mit Ammoniak, schwach alkalisch oder mit Phosphorsäure bzw. deren sauren Salzen schwach sauer gemacht werden. Dann wird belichtet und das Bild zur Herstellung positiver Kopien evtl. mit feuchten Anilindämpfen usw. entwickelt.The solution is poured onto paper films or plates in a known manner, where you can apply iodized layers of different ages on top of each other. The casting is then bathed in 2% potassium bichromate solution. The latter can, depending on the further processing, for example with ammonia, weakly alkaline or with phosphoric acid or its acidic salts be made weakly acidic. Then it is exposed and the image used to make positive Copies may have been developed with damp aniline fumes, etc.
Das neue Verfahren eignet sich auch für die Aufbringung der beschriebenen Schichten auf Dünnfilme (o,o-- mm und mehr), wie sie für Packzwecke verwandt werden, und zwar auch für solche Dünnfilme, die für Reflektographie verwandt werden sollen.The new method is also suitable for the application of the described Layers on thin films (o, o-- mm and more), as they are used for packaging purposes, even for those thin films that are to be used for reflectography.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEM119947D DE598799C (en) | 1932-05-30 | 1932-05-31 | Process for the production of durable bichromate colloid layers for photochemical purposes |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEM0119947 | 1932-05-30 | ||
DEM119947D DE598799C (en) | 1932-05-30 | 1932-05-31 | Process for the production of durable bichromate colloid layers for photochemical purposes |
Publications (1)
Publication Number | Publication Date |
---|---|
DE598799C true DE598799C (en) | 1934-06-18 |
Family
ID=25988388
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEM119947D Expired DE598799C (en) | 1932-05-30 | 1932-05-31 | Process for the production of durable bichromate colloid layers for photochemical purposes |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE598799C (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2574258A (en) * | 1948-04-26 | 1951-11-06 | Warren S D Co | Light-sensitive compositions and plates for photolithography |
US2624672A (en) * | 1948-03-01 | 1953-01-06 | Warren S D Co | Photosensitive printing plate having a light-sensitive coating consisting of a colloid, a phosphate, and a chromium compound |
-
1932
- 1932-05-31 DE DEM119947D patent/DE598799C/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2624672A (en) * | 1948-03-01 | 1953-01-06 | Warren S D Co | Photosensitive printing plate having a light-sensitive coating consisting of a colloid, a phosphate, and a chromium compound |
US2574258A (en) * | 1948-04-26 | 1951-11-06 | Warren S D Co | Light-sensitive compositions and plates for photolithography |
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