DE946327C - Process for improving the whiteness of photographic images produced by the silver salt diffusion process - Google Patents
Process for improving the whiteness of photographic images produced by the silver salt diffusion processInfo
- Publication number
- DE946327C DE946327C DEA17720A DEA0017720A DE946327C DE 946327 C DE946327 C DE 946327C DE A17720 A DEA17720 A DE A17720A DE A0017720 A DEA0017720 A DE A0017720A DE 946327 C DE946327 C DE 946327C
- Authority
- DE
- Germany
- Prior art keywords
- improving
- photographic images
- salt diffusion
- whiteness
- silver salt
- 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
- 238000000034 method Methods 0.000 title claims description 15
- 238000009792 diffusion process Methods 0.000 title claims description 5
- GGCZERPQGJTIQP-UHFFFAOYSA-N sodium;9,10-dioxoanthracene-2-sulfonic acid Chemical compound [Na+].C1=CC=C2C(=O)C3=CC(S(=O)(=O)O)=CC=C3C(=O)C2=C1 GGCZERPQGJTIQP-UHFFFAOYSA-N 0.000 title description 3
- 230000005540 biological transmission Effects 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 238000007254 oxidation reaction Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 2
- 230000001590 oxidative effect Effects 0.000 claims 1
- 150000003839 salts Chemical class 0.000 claims 1
- 239000002253 acid Substances 0.000 description 7
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 6
- 229910052709 silver Inorganic materials 0.000 description 5
- 239000004332 silver Substances 0.000 description 5
- 239000000126 substance Substances 0.000 description 5
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 3
- 238000004383 yellowing Methods 0.000 description 3
- -1 Silver halide Chemical class 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 229910052736 halogen Inorganic materials 0.000 description 2
- 150000002367 halogens Chemical class 0.000 description 2
- 235000011121 sodium hydroxide Nutrition 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- ZFIQGRISGKSVAG-UHFFFAOYSA-N 4-methylaminophenol Chemical compound CNC1=CC=C(O)C=C1 ZFIQGRISGKSVAG-UHFFFAOYSA-N 0.000 description 1
- CIWBSHSKHKDKBQ-JLAZNSOCSA-N Ascorbic acid Natural products OC[C@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-JLAZNSOCSA-N 0.000 description 1
- CIWBSHSKHKDKBQ-DUZGATOHSA-N D-isoascorbic acid Chemical compound OC[C@@H](O)[C@H]1OC(=O)C(O)=C1O CIWBSHSKHKDKBQ-DUZGATOHSA-N 0.000 description 1
- NVXLIZQNSVLKPO-UHFFFAOYSA-N Glucosereductone Chemical compound O=CC(O)C=O NVXLIZQNSVLKPO-UHFFFAOYSA-N 0.000 description 1
- 239000004133 Sodium thiosulphate Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 244000052616 bacterial pathogen Species 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 235000010350 erythorbic acid Nutrition 0.000 description 1
- 229940026239 isoascorbic acid Drugs 0.000 description 1
- AZQWKYJCGOJGHM-UHFFFAOYSA-N para-benzoquinone Natural products O=C1C=CC(=O)C=C1 AZQWKYJCGOJGHM-UHFFFAOYSA-N 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- AKHNMLFCWUSKQB-UHFFFAOYSA-L sodium thiosulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=S AKHNMLFCWUSKQB-UHFFFAOYSA-L 0.000 description 1
- 235000019345 sodium thiosulphate Nutrition 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 230000002087 whitening effect Effects 0.000 description 1
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
- G03C8/00—Diffusion transfer processes or agents therefor; Photosensitive materials for such processes
- G03C8/02—Photosensitive materials characterised by the image-forming section
- G03C8/04—Photosensitive materials characterised by the image-forming section the substances transferred by diffusion consisting of inorganic or organo-metallic compounds derived from photosensitive noble metals
- G03C8/06—Silver salt diffusion transfer
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Photosensitive Polymer And Photoresist Processing (AREA)
- Silver Salt Photography Or Processing Solution Therefor (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
Description
Verfahren zur Verbesserung der Weißen von nach dem Silbersalz-Diffusionsverfahren hergestellten photographischen Bildern Nach dem aus der französischen Patentschrift 879 99'5 bekannten Verfahren zur direkten, Herstellung von photographischen. Bildern wird unbelichtetes, und daher unentwickelbares Halogen silber einer bildmäßig' exponierten photographischen Schicht gelöst und in einer anderen, mit der Halogensilberschicht in engem Kontakt stehenden Übertragungsschicht unter dem katalytischen. Einflur von in dieser Schicht anwesenden. Entwicklungskeimen zu einem positiven. Bild. entwickelt. Die Beziehungen negativ und positiv sind. hierbei nur relativ zueinander zu verstehen, d. h., nach dem gleichen Verfahren können von einer negativen Vorlage auch' direkte Negative erhalten werden. Dieses. Verfahren, ist inzwischen in der Literatur mit Silb,ers.alz.diffus-ion.sverfahren bezeichnet worden.Process for improving the whiteness of photographic images produced by the silver salt diffusion process According to the process known from French patent specification 879 99'5 for the direct production of photographic images. In images, unexposed and therefore undevelopable halogen silver is dissolved in one imagewise exposed photographic layer and in another transfer layer, which is in close contact with the halogen silver layer, below the catalytic layer. Entrance of those present in this shift. Development germs to a positive one. Image. developed. The relationships are negative and positive. to be understood here only in relation to one another, ie, using the same procedure, direct negatives can also be obtained from a negative original. This. Process has meanwhile been referred to in the literature with the syllable, ers.alz.diffus-ion.sverfahren.
Eine der möglichen, Ausführungsfermen, des Verfahrens sieht die Verwendung der beiden Schichten auf getrennten, Trägern, vor.One of the possible, implementation terms, of the method is the use of the two layers on separate carriers.
Bei diesem Verfahren zeigte sich häufig, daß in der Positivschicht _ durch zurückbleibende Chernikalien, insbesondere Entwicklerreste, Vergilbung auftritt. Die meisten Entwicklersubistanzen, wie z. B. die für diesen Zweck meist verwendeten Verbindungen, wie p-Methylaminophenol und Hydro@ chinon, haben die Eigenschaft, bei alkalischer Reaktion an der Luft rasch zu oxydieren und dabei gelb- bis braungefärbte Produkte zu ergeben. Durch ausgiebige Wässerung läßt sich die nachträgliche Vergilbung mehr oder weniger vermeiden. Zwecks Abkürzung des Übertragprotzesses. ergibt sich aber häufig die Notwendigkeit, die Posi-' tive nur kurze Zeit zu wässern..In this process it was often found that in the positive layer _ yellowing occurs due to remaining chemicals, especially developer residues. Most of the developer substances, such as B. those mostly used for this purpose Compounds such as p-methylaminophenol and hydro @ quinone have the property to oxidize rapidly in the case of an alkaline reaction in air and thereby yellow- to give brown colored products. With extensive watering, the Avoid more or less subsequent yellowing. For the purpose of shortening the transfer process. however, there is often the need to only soak the positive for a short time.
Es wurde auch schon vorgeschlagen, zur Vermeidung der Vergilbung die Pcis:itive, mit Säuren zu behandeln. Da aber gleichzeitig- in der Übertragungsschicht stets auch Halogensilberlösungsmittel, wie beispielsweise Natriumthiosulfat, anwesend sind, besteht die Gefahr, daß diese in Säurelösung das Bildsilber angreifen, so daß die Bilder beim Lagern an Kontrast verlieren.It has also been suggested to avoid yellowing the Pcis: itive to treat with acids. But there at the same time - in the transmission layer Silver halide solvents, such as sodium thiosulphate, are always present there is a risk that they will attack the image silver in acid solution, so that the images lose contrast when stored.
Es wurde nun gefunden, da,B man eine erheb liehe Verbesserung der Weißen von nach dem, Silbersalzdiffusionsverfahren hergestelltem: Positivbildern erzielt, wenn, man das-Verfahren -in Gegenwart vorm reduzierenden Verbindungen durchführt, die nicht gefärbte Oxydationsprodukte ergeben und die fähig sind., gefärbte Entwickleroxydationspro:-dukte zu entfärben. Hierfür geeignete Substanzen sind Verbändungen, die im Molekül die Atomgrupp.ierung CO-CHOH- bzw. -COH = COH-in einem Ringsystem oder in offener Kette enthalten. Solche Verbindungen. sind beispielsweise Ascarbinsäure, Isoascorb@insäure, Oxytetronsäure, Dioxymaleinsäure, Redukton oder deren Derivate. Diese Verbindungen können dem. Übertragungs, material bei seiner Herstellung oder nach der üb@ertragung einverleibt werden. Zu diesem Zweck könnten diese Stoffe im Entwicklungsbad oder, in einem besonderen Behandlungsbad zur Anwendung kommen. Beispiel i Eine Entwicklersubstanzen, -wie z. B. Hydrotchinon., enthaltende Halagensilberschicht wird nach der Belichtung unter einer Vorlage gleichzeitig mit einem Übertragungspapier, das Fixiernatron und. Entwicklungskeime und auf i qm 5 g Asco@rbi,nr säure enthält, mit einer Lösung, die auf iooo, ccm Wasser - 2o g Ätznatron enthält, nach dem aus der französischen, Patentschrift 879 995 bekannten Verfahren, behandelt. Die erhaltenen Poisitive zeichnen. sich durch gute Weißen aus,, die auch nach längerem Lagern bestehenbleiben.It has now been found that there is a considerable improvement in the Whitening of positive images produced by the silver salt diffusion process achieved if the process is carried out in the presence of reducing compounds, which result in non-colored oxidation products and which are capable of colored developer oxidation products to discolor. Suitable substances for this are associations that contain the Atom grouping CO-CHOH- or -COH = COH- in a ring system or in an open chain contain. Such connections. are, for example, ascarbic acid, isoascorbic acid, Oxytetronic acid, dioxymaleic acid, reductone or their derivatives. These connections can that. Transmission, material during its manufacture or after transmission be incorporated. For this purpose, these substances could be in the developing bath or are used in a special treatment bath. Example i A developer substance, -like z. B. Hydrotchinon., Containing Halagensilberschicht after exposure under a template at the same time as a transfer paper, the fuser soda and. Development nuclei and contains 5 g of Asco @ rbi, no acid on 1 square meter, with a solution, which contains on 10000 ccm of water - 2o g caustic soda, according to the French, Patent specification 879 995 known method treated. Draw the obtained positives. are characterized by good whites, which persist even after long periods of storage.
Beispiel 2 Eine Entwicklersubstanzen enthaltende Halogensilbersdhicht wird nach der Belichtung unter einer Vorlage gleichzeitig mit einem Übertragungspapier, das Fixiernatron und Entwicklungskeime enthält, mit einer Lösung, die auf iooo ccm: Wasser 2o g Ätznatron und i2 g AscoTbinsäure enthält, nach dem aus der französischen Patentschrift 879 995 bekannten Verfahren behandelt. Die erhaltenen Positive zeichnen sich durch gute und haltbare Weißen aus..Example 2 A silver halide layer containing developing agents after exposure under an original is simultaneously with a transfer paper, which contains fixing soda and development nuclei, with a solution that is iooo ccm: Water contains 20 g of caustic soda and 12 g of ascobinic acid, according to the French Patent 879 995 known method treated. Draw the positives received are characterized by good and durable whites ..
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEA17720A DE946327C (en) | 1953-03-29 | 1953-03-29 | Process for improving the whiteness of photographic images produced by the silver salt diffusion process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEA17720A DE946327C (en) | 1953-03-29 | 1953-03-29 | Process for improving the whiteness of photographic images produced by the silver salt diffusion process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE946327C true DE946327C (en) | 1956-07-26 |
Family
ID=6923960
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DEA17720A Expired DE946327C (en) | 1953-03-29 | 1953-03-29 | Process for improving the whiteness of photographic images produced by the silver salt diffusion process |
Country Status (1)
| Country | Link |
|---|---|
| DE (1) | DE946327C (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2138059A2 (en) * | 1971-05-19 | 1972-12-29 | Polaroid Corp | |
| WO2002074236A3 (en) * | 2000-12-12 | 2002-12-19 | Nicholas V Perricone | Skin whiteners containing hydroxytetronic acid |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2461475A (en) * | 1946-12-18 | 1949-02-08 | Gen Aniline & Film Corp | Gelatin subbing compositions containing ascorbic acid |
-
1953
- 1953-03-29 DE DEA17720A patent/DE946327C/en not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2461475A (en) * | 1946-12-18 | 1949-02-08 | Gen Aniline & Film Corp | Gelatin subbing compositions containing ascorbic acid |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2138059A2 (en) * | 1971-05-19 | 1972-12-29 | Polaroid Corp | |
| WO2002074236A3 (en) * | 2000-12-12 | 2002-12-19 | Nicholas V Perricone | Skin whiteners containing hydroxytetronic acid |
| US7019029B2 (en) | 2000-12-12 | 2006-03-28 | Perricone Nicholas V | Skin whiteners containing hydroxytetronic acid derivatives |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| DE890755C (en) | Process for the direct production of positives | |
| DE966410C (en) | Process for bleach-fixing silver photographic images | |
| DE946327C (en) | Process for improving the whiteness of photographic images produced by the silver salt diffusion process | |
| DE2448433A1 (en) | PROCESS FOR THE PROCESSING OF SILVER PAINT MATERIALS | |
| DE1175074B (en) | Photographic material with a halogen-silver emulsion layer that eliminates the need for fixing | |
| DE1924723A1 (en) | Color bleaching preparation for the photographic silver color bleaching process | |
| DE2300772C3 (en) | Color diffusion transfer process and recording unit for color diffusion transfer process | |
| DE593839C (en) | Process for the treatment of silver images, in particular reversal images | |
| DE954391C (en) | Halogen silver layers containing developer substances | |
| DE907499C (en) | Process for preventing yellowing of photographic images | |
| DE923892C (en) | Process for improving the whiteness of photographic images produced by the silver salt diffusion process | |
| DE947852C (en) | Process for the production of printing plates by photomechanical means by coating aluminum foils or plates with light-sensitive substances | |
| DE955930C (en) | Process for producing a suction material for color copies according to the suction process, in which the colloid layer of the suction material (e.g. blank film) is provided with a color stain | |
| DE486964C (en) | Process for avoiding so-called white spots on photographic developing paper | |
| DE617713C (en) | Process for the production of color images | |
| DE690608C (en) | ||
| DEA0017720MA (en) | ||
| DE901497C (en) | Process for the production of photographic baths using metal complex systems | |
| DE896294C (en) | Process for making photographic registrations and photosensitive material for carrying out the process | |
| DE379998C (en) | Process for the production of light-sensitive, copyable layers | |
| DE825349C (en) | Process for the direct production of positives | |
| DE1171739B (en) | Process for generating a photographic image by heat treatment and transferring the image and photographic material therefor | |
| DE488017C (en) | Photosensitive paper giving positive images by the amine development process | |
| AT119498B (en) | Process for making color photographs. | |
| DE506413C (en) | Process for the production of photographs |