DE373087C - Photographic plates and films for X-ray photography - Google Patents

Photographic plates and films for X-ray photography

Info

Publication number
DE373087C
DE373087C DEL52208D DEL0052208D DE373087C DE 373087 C DE373087 C DE 373087C DE L52208 D DEL52208 D DE L52208D DE L0052208 D DEL0052208 D DE L0052208D DE 373087 C DE373087 C DE 373087C
Authority
DE
Germany
Prior art keywords
water
films
layer
photographic plates
ray photography
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
Application number
DEL52208D
Other languages
German (de)
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.)
A L LANDAU
L A LEVY
Original Assignee
A L LANDAU
L A LEVY
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 A L LANDAU, L A LEVY filed Critical A L LANDAU
Application granted granted Critical
Publication of DE373087C publication Critical patent/DE373087C/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B42/00Obtaining records using waves other than optical waves; Visualisation of such records by using optical means
    • G03B42/02Obtaining records using waves other than optical waves; Visualisation of such records by using optical means using X-rays
    • G03B42/04Holders for X-ray films

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Laminated Bodies (AREA)
  • Compositions Of Macromolecular Compounds (AREA)

Description

Photographische Platten und Filme für Röntgenstrahlenaufnahmen. Es sind bereits photographische Platten, Filme usw. für Röntgenstrahlenaufnahmen u. idgl. bekannt, tiei :denen die lichtempfindliche Schicht mit einer Verstärkungsschicht aus fiuoreszieren!den Stoffen übergelagert ist, welche die Energie der -einfallenden Röntgenstrahlen in ,solche von sichtbaren und ultravioletten Lichtstrahlen verwandeln und,dadurch die für ,die Erzielung !desBildes auf der lichtempfindlichen Platte, Film usw. erforderliche Belichtungszeit wesentlich vermindern. Diese Verstärkungsschicht wird ,gewöhnlich in Gestalt einer Em:ulsion von wolframsaurem Kalk in Zelluloid-, Kollodiumlösung u. dgl. angewendet. Um :diese Schicht nachträglich abzulölsen, werden Lösungsmittel für Zelluloid, wie Azeton, Ätheralkohol u. dgl., verwendet. Diese Arbeitsweise bietet jedoch wesentliche Nachteile. Man muß mit stark flüchtigen und kostspidligen Lösungsmitteln arbeiten, welche außerdem ein starkes D:urchdringungsvermögen besitzen. Abgesehen -davon, :daß die Verwendung einer lichtempfindlichen Kollodi:umemulsion 'dabei ausgeschlo.ssen ,ist, unterliegtdie einzig verwendbare Gelatineemulsion der Einwirkung der Azetonlösung des Zelluloids, welches in die lichtempfindliche Emulsionsschicht eindringen und -dieselbe trüben kann.X-ray photographic plates and films. It are already photographic plates, films, etc. for X-ray recordings u. idgl. known tiei: those the photosensitive layer with a reinforcing layer from fiuoreszieren! the substances is superimposed, which the energy of the incident X-rays into, transforming those of visible and ultraviolet rays of light and, thereby, the for, the achievement! of the image on the photosensitive plate, Film etc. reduce the required exposure time significantly. This reinforcement layer usually in the form of an emulsion of tungstate lime in celluloid, Collodion solution and the like applied. To: remove this layer afterwards, will Solvents for celluloid such as acetone, ether alcohol and the like are used. These However, the mode of operation has significant disadvantages. You have to be very volatile with and Costly solvents work, which also have a strong penetration capacity own. Apart from that: that the use of a light-sensitive collode emulsion 'is excluded, the only usable gelatin emulsion is subject to the Exposure of the acetone solution of the celluloid, which is in the photosensitive emulsion layer can penetrate and cloud it.

Um die Verwendung von Azeton usw. zu vermeiden, wird gemäß vorliegender Erfin-Jung als Ablösungsmittel .der Verstärkungsschicht Wasser verwendet, so daß die genannten Nachteile vermieden werden. Zu diesem ,Zweck wird ider Träger der lichtempfindlichen Salze aus gehärteter wasserunlöslicher Gelatine gebildet, so d;aß diese Schicht unempfindlich gegen Wasserbehandlung ist, während .der fluoreszierende Stoff in einem Träger eingebettet ist, welcher, sei es aus ungehärteter -wasserlöslicher Gelatine besteht und sich .in Wasser .auflöst, .sei -es aus an sich bekanntem Kollodium, Zelluloseazetat u. dgl. zusammengesetzt ist und bei der Behandlung mit Wasser sich als Ganzes abstreifen läßt.In order to avoid the use of acetone, etc., according to the present Erfin-Jung uses water as a release agent for the reinforcement layer, so that the disadvantages mentioned are avoided. For this purpose, I will be the carrier of the photosensitive salts formed from hardened water-insoluble gelatin, so d; ate this layer is insensitive to water treatment, while. the fluorescent Substance is embedded in a carrier, which, be it made of uncured water-soluble Consists of gelatine and .dissolves in water, .be made of collodion known per se, Cellulose acetate and the like, and when treated with water stripped off as a whole.

Beispielsweise kann eine Platte -gemäß Erfindung in folgender Weise hergestellt werden. Eine Unterlage aus Glas, Zelluloid u.,dgl. wird mit einer lichtempfindlichen Gelatineemulsion Überzogen, welche in bekannter Weise, z. B. mittels Chromalauns, :gehärtet wurde. Diese Emulsionsschicht wird dann mit einer Schicht aus wolframsauren Kalk überzogen, der in einem Träger Baus @Gelatine von geringer Lösungstemperatur in Wasser eingebettet ist. Nach der Belichtung wird die Platte während einiger Minuten in lauem Wasser behandelt, welches die Schicht des -,volframszuren Kalkes auflöst, ohne @die gehärtete lichtempfindliche Emulsionsschicht anzugreifen.For example, a plate according to the invention can be made in the following manner getting produced. A base made of glass, celluloid and the like. comes with a photosensitive Gelatin emulsion coated, which in a known manner, for. B. by means of chrome alum, : has been hardened. This emulsion layer is then covered with a layer of tungstate Lime coated in a carrier of building gelatine at a low solution temperature is embedded in water. After the exposure, the plate remains for a few minutes treated in lukewarm water, which dissolves the layer of volatile lime, without attacking the hardened photosensitive emulsion layer.

Bei ,einer anderen .Ausführungsforen wird die Verstärkungsschicht anstatt in Wasser als Lösungsmittel gelöst zu werden, von der Platte abgestreift oder abgeschält. Zu diesem Zwecke ist der fluoreszierende Stoff in einem Träger aus Kollodium, Zelluloseazetät o. dgl. eingebettet, welcher beim Eintauchen der Platte in Wasser sich selbsttätig von der darunterliegenden .gehärteten Gelatineschicht als Ganzes ablöst.In another implementation forum, the reinforcement layer instead of in water to be dissolved as a solvent from the plate stripped or peeled off. For this purpose, the fluorescent substance is in one Carrier made of collodion, cellulose acetate or the like. Embedded, which when immersed the plate in water automatically from the underlying .hardened gelatin layer as a whole.

Claims (1)

PATENTANSPRUCH: Photographische Platten und Filme für Röntgenstrahlenaufnahmen mit einer der lichtempfindlichen Schicht übergelagerten Verstärkungsschicht, dadurch gekennzeichnet, daß die lichtempfindlichen Salze in einem Träger aus ;gehärteter wasserunlöslicher Gelatine und fluoreszierenden Stoffe in einem Träger, sei es aus ungehärteter wasserlöslicher Gelatine, sei es aus an sich bekanntem Kollodium, Zelluloseazetat u. dgl. eingebettet sind, zum Zwecke, als Ablösungsmittel der Verstärkungsschicht Wasser verwenden zu können.PATENT CLAIM: Photographic plates and films for X-ray photography with a reinforcing layer superimposed on the photosensitive layer, thereby characterized in that the photosensitive salts are hardened in a carrier water-insoluble gelatin and fluorescent substances in a carrier, be it made of unhardened, water-soluble gelatin, whether from collodion or cellulose acetate known per se and the like are embedded for the purpose of releasing the reinforcing layer To be able to use water.
DEL52208D 1920-05-07 1921-01-26 Photographic plates and films for X-ray photography Expired DE373087C (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB373087X 1920-05-07

Publications (1)

Publication Number Publication Date
DE373087C true DE373087C (en) 1923-04-03

Family

ID=10395450

Family Applications (1)

Application Number Title Priority Date Filing Date
DEL52208D Expired DE373087C (en) 1920-05-07 1921-01-26 Photographic plates and films for X-ray photography

Country Status (1)

Country Link
DE (1) DE373087C (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1036051B (en) * 1955-05-31 1958-08-07 Du Pont Photographic material for X-rays
DE1174158B (en) * 1961-05-29 1964-07-16 Polaroid Corp Light-sensitive X-ray film unit suitable for photographic diffusion transfer processes with an amplifier layer and a carrier

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1036051B (en) * 1955-05-31 1958-08-07 Du Pont Photographic material for X-rays
DE1174158B (en) * 1961-05-29 1964-07-16 Polaroid Corp Light-sensitive X-ray film unit suitable for photographic diffusion transfer processes with an amplifier layer and a carrier

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