PHOTOGRAPHIC EMULSIONS CONTAINING A DIHYDROSPIROPYRAN BIS-CONDENSATION PRODUCT OF A SALICYCLICALDEHYDE AND AT LEAST ONE HETERO CYCLIC AMMONIUM SALT
PHOTOGRAPHIC EMULSIONS AND ELEMENTS CAPABLE OF FORMING DIRECT-POSITIVE IMAGES Silver halide emulsions are disclosed containing silver halide grains capable of forming an internal latent image. Incorporated in the emulsions as a nucleating agent is a dihydrospiropyran bis-condensation product of sali...
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| creator | BARALLE, ROGER M JORDI, FREDERIC X COMPERE, MARCEL A PFAFF, MAURICE E GOUMONT, CLAUDE G |
| description | PHOTOGRAPHIC EMULSIONS AND ELEMENTS CAPABLE OF FORMING DIRECT-POSITIVE IMAGES Silver halide emulsions are disclosed containing silver halide grains capable of forming an internal latent image. Incorporated in the emulsions as a nucleating agent is a dihydrospiropyran bis-condensation product of salicylic aldehyde and at least one heterocyclic ammonium salt, thereby permitting a direct-positive image to be formed on imagewise exposure and photographic processing. |
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Incorporated in the emulsions as a nucleating agent is a dihydrospiropyran bis-condensation product of salicylic aldehyde and at least one heterocyclic ammonium salt, thereby permitting a direct-positive image to be formed on imagewise exposure and photographic processing.</abstract><oa>free_for_read</oa></addata></record> |
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| language | eng ; fre |
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| subjects | ADHESIVES AUXILIARY PROCESSES IN PHOTOGRAPHY CHEMISTRY CINEMATOGRAPHY DYES ELECTROGRAPHY HOLOGRAPHY LAKES METALLURGY MISCELLANEOUS APPLICATIONS OF MATERIALS MISCELLANEOUS COMPOSITIONS MORDANTS NATURAL RESINS ORGANIC DYES OR CLOSELY-RELATED COMPOUNDS FOR PRODUCING DYES PAINTS PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES PHOTOGRAPHY PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES PHYSICS POLISHES |
| title | PHOTOGRAPHIC EMULSIONS CONTAINING A DIHYDROSPIROPYRAN BIS-CONDENSATION PRODUCT OF A SALICYCLICALDEHYDE AND AT LEAST ONE HETERO CYCLIC AMMONIUM SALT |
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