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Fog prevention method for silver chlorobromide film

A technology of silver chlorobromide and film, applied in the field of photosensitive photographic emulsion, can solve few problems such as

Inactive Publication Date: 2014-11-12
天津天感科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are many kinds of anti-fogging agents that people have studied, but few of them have been obtained and studied in detail

Method used

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  • Fog prevention method for silver chlorobromide film
  • Fog prevention method for silver chlorobromide film
  • Fog prevention method for silver chlorobromide film

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Embodiment Construction

[0012] The present invention will be further described in detail below in conjunction with specific experimental examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0013] Experimental content

[0014] 1 Emulsion Preparation

[0015] The silver chlorobromide emulsion was prepared by computer-controlled double-injection method, the emulsification temperature was 54°C, and the emulsification process lasted for 30 minutes. The obtained silver halide grains are cubic, and the grain diameter is about 0.3 μm.

[0016] 2 chemical sensitization

[0017] The prepared silver halide is redispersed in the glue solution, after S-Au sensitization, spectral sensitization is performed, and then coating additives such as surfactant and stabilizer are added to prepare the emulsion. When coating, there are emulsion layer and protective film layer.

[0018] 3 Photographic performa...

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PUM

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Abstract

The invention discloses a fog prevention method for a silver chlorobromide film, comprising the following steps: a silver chlorobromide emulsion prepared by a computer-controllable double-jet method, the emulsification temperature is 54 DEG C, and the emulsification process lasts for 30min to prepare the emulsion; a 1-phenyl-5-tetrazole-thione solution prepared with alcohol at two thousandth is added into the above glue solution, and standing is performed for 5min; spectral sensitization of sulfur and gold is carried out, a surfactant and a stabilizer coating addition are added, a 1-phenyl-5-tetrazole-thione solution prepared with alcohol at two thousandth is continuously added into the above coating addition, and constant temperature lasts for 0-22h. During maturation process of the emulsion, a certain amount of PMT is added so as to obviously reduce fog of the emulsion.

Description

technical field [0001] The invention relates to the field of photosensitive emulsions, and more specifically relates to a method for preventing fog from being generated in silver chlorobromide films by utilizing 1-phenyl-5-mercaptotetrazolium. Background technique [0002] Photosensitive photographic emulsions often produce fog in the process of preparation, processing and storage, which affects its use effect. Therefore, the stability of fog has become the evaluation of photographic materials. The blackening phenomenon formed by developing the unexposed silver halide part is called fogging. There are many reasons for fog. It is generally believed that larger neutral silver atoms that can form a developing nucleus gather inside the silver halide crystal, and it can also generate density to form fog through development. The reasons for the formation of fog nuclei during emulsion preparation are: the emulsion is too mature to produce fog; too many reducing substances in gelat...

Claims

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Application Information

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IPC IPC(8): G03C1/34G03C1/005
Inventor 王海珠翟秋红李扬董艳楠张慧丽
Owner 天津天感科技有限公司
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