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Plate shape silver halide emulsion adapted to ray photography, producing method and use thereof

A silver halide, emulsion technology, applied in the field of imaging science, can solve problems such as single product variety and quality gap

Inactive Publication Date: 2007-03-21
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, my country can only produce radiographic films for medical and industrial use, and the product variety is single, and there is a big gap between the quality and similar foreign products

Method used

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  • Plate shape silver halide emulsion adapted to ray photography, producing method and use thereof
  • Plate shape silver halide emulsion adapted to ray photography, producing method and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Silver halide emulsion was prepared by computer-controlled double-injection emulsifier, taking two kilograms of emulsified formula as an example.

[0026] (1) Take by weighing 16 grams of photographic lazy gum and 800 milliliters of deionized water, add in the reaction pot, and add potassium iodide 2.0 grams and ammonium bromide 4.0 grams to obtain mixture, wherein, the weight percent concentration of photographic lazy gum in the mixture is 2 ~5%, the concentration of potassium iodide is 0.018~0.03mol, and the concentration of ammonium bromide is 0.05~0.1mol.

[0027] (2) prepare 2mol silver nitrate solution and 2mol ammonium bromide solution;

[0028] (3) The PAg (electrode potential of the emulsion) in the emulsification process is controlled at 6.8 to 10.0, the emulsification temperature is controlled at 50 ° C to 70 ° C, the stirring speed is 1500 rpm to 2500 rpm, and the infusion pump is used at 5.0 ml / min. The material obtained in step (1) and step (2) is mixed b...

Embodiment 2

[0032]The preparation method of platy silver halide emulsion is basically the same as that of Example 1, except that in the emulsification stage (when the total silver content is about 50%), 5.0×10 -4 -5.0×10 -7 mol(Srcl 2 ) / AgBrImol, 2.0 milliliters, other tests are identical with comparative example, and gained photosensitivity performance test result is shown in Table 1.

Embodiment 3

[0034] The plate-like silver halide emulsion preparation method is different from Example 1 in that photographic gelatin, potassium bromide, 5% mol ammonium bromide, 5.0 × 10 -4 -5.0×10 -7 mol (Ircl 6 ) -3 / molAgBrI, 2.0 ml. Other control and test conditions are the same as in Example 1, and the results of the photosensitive performance test are shown in Table 1.

[0035] Table 1

[0036]

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PUM

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Abstract

This invention particularly relates to the high-energy radiography, the high sensitivity, high contrast of the silver halide emulsion coating plate's photosensitive materials which the high-speed photographic technique uses and the silver halide emulsion's preparation method and its use. The stated silver halide emulsion contains the iodine silver bromide which has the silver bromide as the main part, the proportion of the Br and I is 95~98%mol to 5~2%mol, the weight proportion of the photo indolent glue and the silver is 0.7 ~ 1.5 to 1, the iridium salt and rhodium salt or strontium salt's concentration is10-3~10-6mol / molAgBrI, the particle size is 1.5-2.0 mum.. The double beam emulsion preparation method which adopts the computer control uses the silver halide as the main iodine silver bromide crystallite emulsion, on the emulsification or the chemical.

Description

technical field [0001] The invention belongs to the field of imaging science and technology, and in particular relates to a high-sensitivity, high-contrast plate-shaped silver halide emulsion-coated photosensitive material used in high-energy radiography and high-speed photography, as well as a preparation method and application of the plate-shaped silver halide emulsion. Background technique [0002] There are many kinds of special ray-sensitive materials abroad (medical, industrial, and scientific research) with different performances. Kodak Company of the United States can produce more than 20 kinds of ray films for scientific research. In the research of high-speed photography, nuclear explosion trajectory and life process, to solve the high-illuminance reciprocity law failure of film, extremely high sensitivity is required. The use of photographic film with long-term weak light sources must solve the low-illuminance reciprocity law failure of the film, requiring extreme...

Claims

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Application Information

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IPC IPC(8): G03C1/005G03C1/015G03C1/50G03C1/09G03C1/34
Inventor 崔学福马凤云赵艳艳段培成杨新民
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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