DE611324C - Process for the production of transparent, homogeneous filter layers on photographic layers - Google Patents
Process for the production of transparent, homogeneous filter layers on photographic layersInfo
- Publication number
- DE611324C DE611324C DEI40919D DEI0040919D DE611324C DE 611324 C DE611324 C DE 611324C DE I40919 D DEI40919 D DE I40919D DE I0040919 D DEI0040919 D DE I0040919D DE 611324 C DE611324 C DE 611324C
- Authority
- DE
- Germany
- Prior art keywords
- layers
- production
- transparent
- photographic
- filter layers
- 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
- G03C1/76—Photosensitive materials characterised by the base or auxiliary layers
- G03C1/825—Photosensitive materials characterised by the base or auxiliary layers characterised by antireflection means or visible-light filtering means, e.g. antihalation
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optical Filters (AREA)
Description
Verfahren zur Herstellung von transparenten homogenen Filterschichten auf photographischen.Schichten Zur Herstellung von Filterschichten für photographische Zwecke, wie sie z. B. bei den Mehrpackverfahren der Farbenphotographie notwendig sind, verwendet man, namentlich wenn es sich um mehrere übereinander angeordnete Schichten handelt, möglichst wenig diffundierende Farbstoffe. Die bisher beschriebenen Farbstoffe, z. B. die des Reichspatents 439 2o6, sind jedoch wasserlöslich und zeigen bei dickeren, verhältnismäßig langsam trocknenden Schichten eine merkliche Diffusion. Es sind auch schon Gelatineschichten mit Färbstoffverbindungen bekannt, die in diesen durch Ausfällen unlöslich gemacht worden sind; so daß sie nicht diffundieren können.Process for the production of transparent, homogeneous filter layers on photographic layers For the production of filter layers for photographic Purposes such as B. necessary in the multi-pack process of color photography are used, especially when there are several superimposed Layers is about the least possible diffusing dyes. The ones described so far Dyes, e.g. B. those of Imperial Patent 439 2o6, but are water-soluble and show with thicker, relatively slow drying layers, a noticeable diffusion. There are also already known gelatin layers with dye compounds that are contained in these have been made insoluble by precipitation; so that they cannot diffuse.
Es wurde nun gefunden, daß auch dann jede störende Diffusion vermieden werden kann, wenn man in einem zur Herstellung bestimmten Bindemittel wasserunlösliche Farblacke fein verteilt. Bei hinreichender Durchmischung des Bindemittels mit dem @vasserunlöslichen Farblack gelingt es, Filterschichten herzustellen, die nach dem Trocknen völlig homogen und transparent erscheinen.It has now been found that even then any disruptive diffusion is avoided can be if one is water-insoluble in a binder intended for the production Color lakes finely distributed. With sufficient mixing of the binder with the @ water-insoluble colored varnish succeeds in producing filter layers that after the Dry appear completely homogeneous and transparent.
Zur Herstellung der Filterschichten sind alle wasserunlöslichen organischen Farblacke geeignet, die keine störende Einwirkung auf die lichtempfindlichen photographischen Schichten ausüben. Die Farbstofflacke werden nach in der Färberei üblichen Methoden dargestellt mit dem Unterschied, daß man die Fällung nicht in Gegenwart eines Substrates vornimmt. In Teig- oder Pastenform werden die ausgefällten Lacke so lange mit dem Bindemittel innig vermischt, bis .eine homogen gefärbte Masse entsteht. Beispiel Eine wässerige Lösung von Kongorot wird so lange mit einer wässerigen Lösung von Bariumchlorid versetzt, bis kein weiterer Niederschlag entsteht. Der Niederschlag wird durch Dekantieren gereinigt und danach mit einer auf q:0` C erwärmten z oprozentigen wässerigen Gelatinelösung versetzt. Die Gelatin:elösung wird so lange kräftig durchgemischt, bis sie das Aussehen .einer- gleichmäßig gefärbten, durchscheinenden Masse annimmt. Die Herstellung der Filterschichten erfolgt dann in der üblichen Weise nach dem Gießverfahren. Die dabei entstehende Farbstoffgelatineschicht ist transparent und zeigt auch im feuchten Zustand keinerlei Diffusion. Durch Baden in :einer angesäuerten Lösung von Natriumhydrosulfit läßt sie sich leicht entfärben.The filter layers are all water-insoluble organic Color lakes suitable that do not interfere with the light-sensitive photographic Exercise shifts. The dye lakes are made by methods customary in dyeing shown with the difference that the precipitation is not carried out in the presence of a substrate undertakes. In dough or paste form, the precipitated varnishes are so long with the The binder is intimately mixed until a homogeneously colored mass is produced. example An aqueous solution of Congo Red becomes so long with an aqueous solution of Barium chloride is added until no further precipitate forms. The precipitation is cleaned by decanting and then with a z o percent warmed to q: 0` C aqueous gelatin solution added. The gelatin solution is vigorously mixed until until it takes on the appearance of a uniformly colored, translucent mass. The filter layers are then produced in the customary manner according to the Casting process. The resulting dye gelatin layer is transparent and shows no diffusion even when moist. By bathing in: an acidified It can be easily decolorized in a solution of sodium hydrosulphite.
Claims (1)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE386942D BE386942A (en) | 1931-03-10 | ||
DEI40919D DE611324C (en) | 1931-03-10 | 1931-03-10 | Process for the production of transparent, homogeneous filter layers on photographic layers |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEI40919D DE611324C (en) | 1931-03-10 | 1931-03-10 | Process for the production of transparent, homogeneous filter layers on photographic layers |
Publications (1)
Publication Number | Publication Date |
---|---|
DE611324C true DE611324C (en) | 1935-03-26 |
Family
ID=7190421
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEI40919D Expired DE611324C (en) | 1931-03-10 | 1931-03-10 | Process for the production of transparent, homogeneous filter layers on photographic layers |
Country Status (2)
Country | Link |
---|---|
BE (1) | BE386942A (en) |
DE (1) | DE611324C (en) |
-
0
- BE BE386942D patent/BE386942A/xx unknown
-
1931
- 1931-03-10 DE DEI40919D patent/DE611324C/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
BE386942A (en) |
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