MANUFACTURE OF SILVER HALIDE PHOTOGRAPHIC EMULSION
PURPOSE: To reduce fog and to obtain high-contrast photographic characteristics and to enhance a covering power by incorporating a low molecular gelatin in a specified average molecular weight range and at least one of tetrazaindene or its derivatives. CONSTITUTION: The silver halide emulsion grains...
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| creator | BABA SUSUMU MORI TOMOO |
| description | PURPOSE: To reduce fog and to obtain high-contrast photographic characteristics and to enhance a covering power by incorporating a low molecular gelatin in a specified average molecular weight range and at least one of tetrazaindene or its derivatives. CONSTITUTION: The silver halide emulsion grains use the low molecular gelatin in an average molecular weight of 5,000-70,000, preferably, 10,000-50,000, especially, 10,000-30,000, as a protective colloid, and they contain at least one of the tetrazaindene and its derivatives. If the average molecular weight of the gelatin is lower than 5000, the viscosity of the emulsion is too low, resulting in unsuitably fast settling of the silver halide grains. It is preferred that the tetrazainde compound is added in a stage before a desalting step. |
| format | Patent |
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CONSTITUTION: The silver halide emulsion grains use the low molecular gelatin in an average molecular weight of 5,000-70,000, preferably, 10,000-50,000, especially, 10,000-30,000, as a protective colloid, and they contain at least one of the tetrazaindene and its derivatives. If the average molecular weight of the gelatin is lower than 5000, the viscosity of the emulsion is too low, resulting in unsuitably fast settling of the silver halide grains. 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CONSTITUTION: The silver halide emulsion grains use the low molecular gelatin in an average molecular weight of 5,000-70,000, preferably, 10,000-50,000, especially, 10,000-30,000, as a protective colloid, and they contain at least one of the tetrazaindene and its derivatives. If the average molecular weight of the gelatin is lower than 5000, the viscosity of the emulsion is too low, resulting in unsuitably fast settling of the silver halide grains. It is preferred that the tetrazainde compound is added in a stage before a desalting step.</description><subject>AUXILIARY PROCESSES IN PHOTOGRAPHY</subject><subject>CINEMATOGRAPHY</subject><subject>ELECTROGRAPHY</subject><subject>HOLOGRAPHY</subject><subject>PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES</subject><subject>PHOTOGRAPHY</subject><subject>PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES</subject><subject>PHYSICS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1996</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZDDydfQLdXN0DgkNclXwd1MI9vQJcw1S8HD08XRxVQjw8A_xdw9yDPDwdFZw9Q31Cfb09-NhYE1LzClO5YXS3AyKbq4hzh66qQX58anFBYnJqXmpJfFeAR4GFkZGBmZmBo7GxKgBAI7HJys</recordid><startdate>19960830</startdate><enddate>19960830</enddate><creator>BABA SUSUMU</creator><creator>MORI TOMOO</creator><scope>EVB</scope></search><sort><creationdate>19960830</creationdate><title>MANUFACTURE OF SILVER HALIDE PHOTOGRAPHIC EMULSION</title><author>BABA SUSUMU ; MORI TOMOO</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JPH08220660A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1996</creationdate><topic>AUXILIARY PROCESSES IN PHOTOGRAPHY</topic><topic>CINEMATOGRAPHY</topic><topic>ELECTROGRAPHY</topic><topic>HOLOGRAPHY</topic><topic>PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR,STEREO-PHOTOGRAPHIC PROCESSES</topic><topic>PHOTOGRAPHY</topic><topic>PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES</topic><topic>PHYSICS</topic><toplevel>online_resources</toplevel><creatorcontrib>BABA SUSUMU</creatorcontrib><creatorcontrib>MORI TOMOO</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>BABA SUSUMU</au><au>MORI TOMOO</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>MANUFACTURE OF SILVER HALIDE PHOTOGRAPHIC EMULSION</title><date>1996-08-30</date><risdate>1996</risdate><abstract>PURPOSE: To reduce fog and to obtain high-contrast photographic characteristics and to enhance a covering power by incorporating a low molecular gelatin in a specified average molecular weight range and at least one of tetrazaindene or its derivatives. CONSTITUTION: The silver halide emulsion grains use the low molecular gelatin in an average molecular weight of 5,000-70,000, preferably, 10,000-50,000, especially, 10,000-30,000, as a protective colloid, and they contain at least one of the tetrazaindene and its derivatives. If the average molecular weight of the gelatin is lower than 5000, the viscosity of the emulsion is too low, resulting in unsuitably fast settling of the silver halide grains. It is preferred that the tetrazainde compound is added in a stage before a desalting step.</abstract><edition>6</edition><oa>free_for_read</oa></addata></record> |
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| subjects | 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 | MANUFACTURE OF SILVER HALIDE PHOTOGRAPHIC EMULSION |
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