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Silver halide photographic material

A photographic material, silver halide technology, applied in the direction of X-ray/infrared technology, which can solve the problems of high sensitivity and weak ability to adapt to rapid processing.

Inactive Publication Date: 2005-07-13
BAODING LUCKY FILM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, U.S. Patent No. 5,004,669 discloses a core-shell structure emulsion, which has a weak ability to adapt to rapid processing during the processing after coating, and at the same time, if the proportion of silver chloride to the total silver is too high, it is not easy to achieve higher sensitivity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In a stirring reaction vessel, add 1 liter of deionized water, 20 g of photographic gelatin and 2.4 g of analytically pure NaCl, raise the temperature to 65°C while stirring, keep the temperature and stirring speed constant, and inject 1.5M NaCl at a constant speed. AgNO 3 The solution was 36mmol, stirred at constant temperature for 3 minutes, and then injected into the reaction vessel with 1.5M AgNO 3 solution and the same volume of 1.17M NaCl solution and 0.33M KBr mixed solution, it takes 23 minutes to consume AgNO 3 0.395mol, the double injection is over, stir for 2 minutes, add 30ml of a solution containing 1.7g KI, stir for 3 minutes, continue to inject 1.5M AgNO 3 With 1.5M KBr solution, it takes 23 minutes (Cl=39.6%, I=1.16% where: C180% in the nucleus), consumes AgNO 3 0.514mol, the injection is over. Then mature for 10 minutes, carry out desalting and redispersion to obtain emulsion A, its equivalent circle diameter is 0.35 microns, and the coefficient of v...

Embodiment 2

[0020] In a stirred reaction vessel, add 1 liter of deionized water, 20 g of photographic gelatin and 2.4 g of analytically pure NaCl, and raise the temperature to 65° C. while stirring. Keep the temperature and stirring speed constant, and inject 1.5M AgNO at a constant speed 3 The solution was 36mmol, stirred at constant temperature for 3 minutes, and then injected 1.5M AgNO into the reaction vessel at a uniform acceleration using balanced double injection 3 solution and 1.5M NaCl and KBr mixed solution (ratio is 2:3), it takes 23 minutes to consume AgNO 3 0.395mol, the double injection is over, stir for 2 minutes, add 30ml of a solution containing 1.7gKI, stir for 3 minutes, continue to inject AgNO 3 With 1.5M KBr solution, it takes 23 minutes, (Cl=22.6%, I=1.16%, wherein: C140% in the nucleus) to consume AgNO 30.514mol, the injection is over. Then mature for 15 minutes, carry out desalting and redispersion to obtain emulsion B, its equivalent circle diameter is 0.35 mic...

Embodiment 3

[0022] In a stirring reaction vessel, add 1 liter of deionized water, 20 g of photographic gelatin and 2.4 g of analytically pure NaCl, raise the temperature to 65°C while stirring, keep the temperature and stirring speed constant, and inject 1.5M NaCl at a constant speed. AgNO 3 Solution 36mmol, and stirred at constant temperature for 3 minutes, then use balanced double injection to inject 1.5M AgNO into the reaction vessel at a uniform speed 3 solution and 1.5M NaCl and KBr mixed solution (concentration ratio is 1:1), it takes 23 minutes to consume AgNO 3 0.395mol, the double injection is completed, stir for 2 minutes, and add 30ml of a solution containing 1.7gKI, stir for another 3 minutes, and continue to inject AgNO 3 With 1.5M NaCl and KBr mixed solution (the ratio is 2:8), it takes 23 minutes to consume AgNO 3 0.514 mol, end of injection (Cl=38.7%, of which: 50% in the core, 20% in the shell; I=1.16%). Then mature for 15 minutes, carry out desalting and redispersion ...

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PUM

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Abstract

The present invention relates to a silver halide photographic material, in particular to a silver halide photographic material for medical diagnosis which contains a novel silver halide emulsion and can meet soft tissue photography. One side of the support of the silver halide photographic material is coated with a silver halide emulsion layer And the protective layer, its other side is coated with a back layer, which is characterized in that the silver halide crystallites have a core-shell structure, the core layer is a halogen component with good solubility, and the shell layer is a relatively low-solubility halogen group In other words, the silver halide photographic material can adapt to the rapid processing process and has the characteristics of high sensitivity, high contrast and high definition. The silver halide photographic material is used for soft tissue diagnosis and photography, and good results are obtained.

Description

technical field [0001] The invention relates to a silver halide photographic material, in particular to a silver halide photographic material for medical diagnosis which contains a novel silver halide emulsion and can satisfy soft tissue photography. technical background [0002] The history of using radiation-sensitive silver halide in medical diagnostic imaging technology can be traced back to Roentgen's inadvertent discovery in 1895 that X-rays can expose silver halide photosensitive materials. In 1913 Kodak introduced its first X-ray sensitive camera. But the truly high-level medical imaging diagnostic film that can limit the patient's absorbed dose of X-rays should be the double-sided coated silver halide emulsion film launched by Kodak in 1918. Recognizing that silver halide emulsions are more sensitive to visible light than X-rays, in the same year PattersonScreen introduced an intensifying screen that matched Kodak's double-sided silver halide emulsion-coated medica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03C5/16
Inventor 江晓利王亮
Owner BAODING LUCKY FILM