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Chemical sensibilization method of plate type silver iodo-bromide grain emulsion

A silver bromoiodide and chemical sensitization technology, which is applied in the field of photosensitive materials, can solve the problems that the sensitization effect of silver halide emulsion has not been seen, etc.

Inactive Publication Date: 2016-01-13
南京瑞盈环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, there is no relevant report on the sensitization of lanthanides and actinides in the periodic table to silver halide emulsions in photosensitive materials.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] A chemical sensitization method for a plate-like silver bromoiodide grain emulsion, the method is at a constant temperature of 45-55°C, adding the gelatin aqueous solution of gadolinium oxysulfide grains after ball milling to the plate-like silver bromoiodide emulsion, and the addition amount is 1×10 -4 ~1×10 -5 mol / molAg, the maturation time is 20-60 minutes, and then quickly frozen and stored, the details are as follows:

[0014] (1) First, 6 grams of gadolinium oxysulfide (GaS 2 o 2 :Tb 3+ ) powder was stirred and dispersed in 200 ml of gelatin aqueous solution with a mass percentage concentration of 7%, and then ultrasonically treated at room temperature for 20 minutes, so that the particles of gadolinium oxysulfide were uniformly dispersed in the aqueous gelatin solution; The mass percentage concentration is 3%.

[0015] (2) uniformly dispersed gadolinium oxysulfide (GaS 2 o 2 :Tb 3+ ) The gelatin aqueous solution is poured into a ball mill tank for ball mil...

Embodiment 2

[0019] Another chemical sensitization method of plate-shaped silver bromoiodide grain emulsion is as follows:

[0020] (1) First, 10 grams of gadolinium oxysulfide (GaS 2 o 2 :Tb 3+ ) powder was stirred and dispersed in 200 ml of gelatin aqueous solution with a mass percentage concentration of 7%, and then ultrasonically treated at room temperature, so that gadolinium oxysulfide particles were evenly dispersed in the gelatin aqueous solution; Min concentration is 5%.

[0021] (2) uniformly dispersed gadolinium oxysulfide (GaS 2 o 2 :Tb 3+ ) The gelatin aqueous solution is poured into a ball mill tank for ball milling, using 100?10,500?6 zirconia balls for ball milling, the revolution speed is 580 revolutions per minute, and the time is 15 hours. and gadolinium oxysulfide (GaS 2 o 2 :Tb 3+ ) in aqueous gelatin solution;

[0022] (3) At 45°C, add 20 ml of the ball-milled gadolinium oxysulfide (GaS 2 o 2 :Tb 3+ ) granule gelatin aqueous solution, the addition amount ...

Embodiment 3

[0025] Another chemical sensitization method of plate-shaped silver bromoiodide grain emulsion is as follows:

[0026] (1) First, 20 grams of gadolinium oxysulfide (GaS 2 o 2 :Tb 3+ ) powder was stirred and dispersed in 200 ml of gelatin aqueous solution with a mass percentage concentration of 7%, and then ultrasonically treated at room temperature, so that gadolinium oxysulfide particles were evenly dispersed in the gelatin aqueous solution; Min concentration is 10%.

[0027] (2) uniformly dispersed gadolinium oxysulfide (GaS 2 o 2 :Tb 3+ ) The gelatin aqueous solution is poured into a ball milling tank for ball milling, using 100 ? and gadolinium oxysulfide (GaS 2 o 2 :Tb 3+ ) in aqueous gelatin solution;

[0028] (3) At 55°C, add 30 ml of the ball-milled gadolinium oxysulfide (GaS 2 o2 :Tb 3+ ) granule gelatin aqueous solution, the addition amount is 1×10 -5 mol / molAg, the maturation time is 60 minutes, and then smear, exposure, developing and fixing processing...

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Abstract

The invention discloses a chemical sensibilization method of plate type silver iodo-bromide grain emulsion. The chemical sensibilization method comprises the following steps: stirring and dispersing a certain amount of gadolinium oxysulfide powder into 3 to 8 percent of a gelatin aqueous solution, and performing ultrasonic treatment to enable gadolinium oxysulfide particles to be uniformly dispersed into the gelatin solution; then pouring the uniformly dispersed gadolinium oxysulfide gelatin aqueous solution into a ball grinding tank for grinding to obtain a gelatin system containing gadolinium oxysulfide particles of which the diameter is 1 to 10 microns and the particle size distribution is narrow; finally, under the constant temperature of 45 to 55 DEG C, adding the gelatin system with the micron gadolinium oxysulfide particles subjected to ball grinding, and quickly freezing the gelatin system for storage. Compared with the conventional sulfur and gold chemical sensibilization, the plate type silver iodo-bromide grain emulsion subjected to gadolinium oxysulfide chemical sensibilization has the advantage that the photosensitivity can be improved by 3 times; the plate type silver iodo-bromide grain emulsion subjected to chemical sensibilization by the gadolinium oxysulfide gelatin system can still keep high stability of the particle size and can be stored for a long time.

Description

technical field [0001] The invention belongs to the technical field of photosensitive materials, and in particular relates to a chemical sensitization method for a plate-shaped silver bromoiodide grain emulsion. Background technique [0002] Up to now, silver halide photosensitive materials have a very high sensitivity and excellent image quality, and are widely used in various fields such as national defense and military, aerospace, scientific research and teaching, and industrial flaw detection. Although after nearly 20 years of development, the highest pixel of the camera used in digital technology has even reached hundreds of millions, and it has a very high sensitivity and excellent image quality. It has replaced silver halide photography and occupied the main position in the civilian market. In the field of special imaging, so far digital photography technology has not been able to obtain sufficiently clear and visible images, and the clarity of the image will become w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G03C1/015
Inventor 琚伟马望京
Owner 南京瑞盈环保科技有限公司
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