Entwicklerzusammensetzung für photographische Silberhalogenidmaterialien und Verfahren zur Herstellung von Silberbilden
The present invention relates to a black-and-white aqueous alkaline photographic developer composition, free of dihydroxybenzene developing agent, comprising a reductic acid developing agent and an auxiliary superadditive developing agent, wherein the reductic acid developing agent is represented by...
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| Main Authors | , , , |
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| Format | Patent |
| Language | German |
| Published |
17.03.2005
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| Edition | 7 |
| Subjects | |
| Online Access | Get full text |
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| Abstract | The present invention relates to a black-and-white aqueous alkaline photographic developer composition, free of dihydroxybenzene developing agent, comprising a reductic acid developing agent and an auxiliary superadditive developing agent, wherein the reductic acid developing agent is represented by the formula (I): wherein, R1, R2, R3 and R4 each are selected from the group consisting of hydrogen and group CH2R5, wherein R5 is hydrogen or a monovalent group, e.g. amino, cyano, halogen, hydroxyl, carboxyl, sulfonyl, alkyl, cycloalkyl, aryl. A process for forming a black-and-white photographic silver image comprising developing a silver halide photographic element with said black-and-white aqueous alkaline photographic developer composition is also described. |
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| AbstractList | The present invention relates to a black-and-white aqueous alkaline photographic developer composition, free of dihydroxybenzene developing agent, comprising a reductic acid developing agent and an auxiliary superadditive developing agent, wherein the reductic acid developing agent is represented by the formula (I): wherein, R1, R2, R3 and R4 each are selected from the group consisting of hydrogen and group CH2R5, wherein R5 is hydrogen or a monovalent group, e.g. amino, cyano, halogen, hydroxyl, carboxyl, sulfonyl, alkyl, cycloalkyl, aryl. A process for forming a black-and-white photographic silver image comprising developing a silver halide photographic element with said black-and-white aqueous alkaline photographic developer composition is also described. |
| Author | MOIZO, ELDA MOTT, ANDREW STEVENSON, DIAN MARCHESANO, CARLO |
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| Notes | Application Number: DE19946033711T |
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| RelatedCompanies | FERRANIA S.P.A., CAIRO MONTENOTTE |
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| Snippet | The present invention relates to a black-and-white aqueous alkaline photographic developer composition, free of dihydroxybenzene developing agent, comprising a... |
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| SubjectTerms | AUXILIARY PROCESSES IN PHOTOGRAPHY CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES PHOTOGRAPHY PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES PHYSICS |
| Title | Entwicklerzusammensetzung für photographische Silberhalogenidmaterialien und Verfahren zur Herstellung von Silberbilden |
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