DE374066C - Use of dye-stained underlayers on light-sensitive material - Google Patents
Use of dye-stained underlayers on light-sensitive materialInfo
- Publication number
- DE374066C DE374066C DEF49408D DEF0049408D DE374066C DE 374066 C DE374066 C DE 374066C DE F49408 D DEF49408 D DE F49408D DE F0049408 D DEF0049408 D DE F0049408D DE 374066 C DE374066 C DE 374066C
- Authority
- DE
- Germany
- Prior art keywords
- underlayers
- light
- stained
- dye
- sensitive material
- 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
- G03C5/00—Photographic processes or agents therefor; Regeneration of such processing agents
- G03C5/26—Processes using silver-salt-containing photosensitive materials or agents therefor
- G03C5/395—Regeneration of photographic processing agents other than developers; Replenishers therefor
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Paper (AREA)
Description
Verwendung von mit Farbstoffen angefärbten Unterschichten bei lichtempfindlichem material. Bei der photographischen Bearbeitung mittelbar oder unmittelbar auf Papier aufgebrachter lichtempfindlicher Halogensilberschichten hat es sich als sehr störend erwiesen, daß man die Beendigung der Fixage nur sehr schwer feststellen kann.Use of underlayers colored with dyes for photosensitive material. In photographic processing directly or indirectly on paper applied light-sensitive halogen silver layers, it has proven to be very troublesome proved that it is very difficult to determine the end of the fixation.
Bei Glasplatten und Filmen läßt sich dies bekanntlich leicht durch Betrachtung im durchfallenden Licht ermitteln. Bei lichtempfindlichen Papieren ist diese Kontrolle im durchfallenden Licht nicht möglich, da der Papierfilm die Durchsicht hindert; man muß infolgedessen im reflektierenden Lichte die Kontrolle vornehmen, und hier bietet die Tatsache, daß die Eigenfarbe des Halogensilbers sich von der weißen Farbe des Papieruntergrundes sehr wenig abhebt,, große Schwierigkeit in der Beurteilung der Beendigung der Fixage, da es nicht erkennbar ist, ob daß unentwickelte Halogensilber noch vorhanden oder bereits ausfixiert ist.In the case of glass plates and films, this is known to be easy to do Determine viewing in transmitted light. In the case of photosensitive papers this control in transmitted light is not possible because the paper film is transparent hinders; consequently one must carry out the control in the reflecting light, and here the fact that the inherent color of the halogen silver differs from the white color of the paper background stands out very little, great difficulty in the Judgment on the completion of the fixation, since it cannot be seen whether that is undeveloped Halogen silver is still present or has already been fixed.
Es wurde nun die überraschende Beobachtung gemacht, daß die Feststellung der Beendigung der Fixage leicht möglich ist, wenn das Papier bzw. die zwischen dem Papier und der lichtempfindlichen Schicht angeordneten Schichten mit blauen Farbstoffen angefärbt oder mit blauen Pigmenten, beliebigen Ursprungs versetzt sind. Je nach Verwendungszweck, ob für Aufsichtsbilder oder für abziehbare Schichten, können diese so gewählt sein, daß sie entweder unter Zuhilfenahme geeigneter Mittel entfernt werden können, oder aber aus dem Untergrund nicht entfernt werden können. Letzterer Fall ist beispielsweise bei den sogenannten Abziehfilmen gegeben.The surprising observation has now been made that the finding the termination of the fixation is easily possible if the paper or the between layers with blue layers arranged on the paper and the photosensitive layer Dyes colored or mixed with blue pigments, of any origin. Depending on the intended use, whether for reflective images or for peelable layers, these can be chosen so that they can either be with the aid of suitable means can be removed, or cannot be removed from the substrate. The latter case is the case, for example, with so-called release films.
Die Verwendung gefärbter Unterschichten als Indikatur für die Beendigung der Fixage ist dadurch ermöglicht, daß das wenig belichtete und daher unentwickelte Halogensilber längere Zeit zur Aasfixierung benötigt als das unter dem entwickelten (schwarzen) Silberniederschlag befindliche. Wenn sonach das unentwickelte Halogensilber die Farbe des Untergrundes im Fixierbad erkennen läßt, also durchsichtig geworden ist, ist das unter dem entwickelten schwarzen Niederschlag befindliche unentwickelte Halogensilb-r ebenfalls ausfixiert.The use of colored underlayers as a sign of termination the fixation is made possible by the fact that the little exposed and therefore undeveloped Halogen silver takes longer to fix than that under the developed one (black) silver deposit. If so the undeveloped halogen silver the color of the background in the fixer can be seen, so it has become transparent is, that under the developed black precipitate is undeveloped Halogensilb-r also fixed out.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEF49408D DE374066C (en) | 1921-06-02 | 1921-06-02 | Use of dye-stained underlayers on light-sensitive material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEF49408D DE374066C (en) | 1921-06-02 | 1921-06-02 | Use of dye-stained underlayers on light-sensitive material |
Publications (1)
Publication Number | Publication Date |
---|---|
DE374066C true DE374066C (en) | 1923-04-19 |
Family
ID=7103000
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEF49408D Expired DE374066C (en) | 1921-06-02 | 1921-06-02 | Use of dye-stained underlayers on light-sensitive material |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE374066C (en) |
-
1921
- 1921-06-02 DE DEF49408D patent/DE374066C/en not_active Expired
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