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Efficient sensibilization method suitable for platy silver halides particle emulsion

A silver halide, plate-like technology, applied in the field of photosensitive materials, can solve problems such as limited effect, and achieve the effect of small fog

Inactive Publication Date: 2013-03-20
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

[0003] In order to avoid the recombination of photogenerated holes and electrons, people have successively proposed the halogen absorber method (absorbing holes), doping the microcrystal with iodine ions and double structure (effectively separating holes and electrons), in order to reduce the recombination loss of electrons and increase its effective utilization. rate, in order to achieve the purpose of increasing the sensitivity, but practice has proved that these methods are indeed effective, but the effect is extremely limited

Method used

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  • Efficient sensibilization method suitable for platy silver halides particle emulsion
  • Efficient sensibilization method suitable for platy silver halides particle emulsion
  • Efficient sensibilization method suitable for platy silver halides particle emulsion

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Effect test

Embodiment 1

[0025] Combined sensitization: At a constant temperature of 50°C, potassium oxalate was added as a sensitizer to 100 g of plate-shaped silver bromoiodide grain emulsion obtained in Comparative Example 1, in an amount of 1×10 -5 mol / molAg, and then add Na with a mass percentage of 0.1% in sequence according to the conventional sulfur and gold method 2 S 2 O 3 Aqueous solution of 0.4mL, AuCl with a mass percentage concentration of 0.0167% 3 Aqueous solution and 0.2% NH by mass percentage 4 SCN aqueous solution was mixed with a volume ratio of 1:1 in 1.2 mL of gold mixed aqueous solution, matured for 70-110 minutes, and finally added with a stabilizer (4-hydroxy-6-methyl-1, 3, 3a) with a mass percentage of 4% , 7-tetraazaindene) 1.0mL, quickly frozen at 0°C, to obtain a tabular silver bromoiodide grain emulsion sensitized by potassium oxalate and sulfur gold.

[0026] The two emulsions of Comparative Example 1 and Example 1 were respectively coated on a polyester film base for sensiti...

Embodiment 2

[0032] Combined sensitization: At a constant temperature of 50°C, sodium oxalate was added as a sensitizer to 100 grams of tabular silver bromoiodide grain emulsion obtained in Comparative Example 1, and the addition amount was 1×10 -1 mol / molAg, and then add Na with a concentration of 0.1% by mass according to the conventional sulfur and gold method 2 S 2 O 3 Aqueous solution 0.8mL, AuCl with a mass percentage concentration of 0.0167% 3 Aqueous solution and 0.2% NH by mass percentage 4 The SCN aqueous solution is 1.6 mL of gold mixed aqueous solution mixed in a volume ratio of 1:1, matured for 70-110 minutes, and finally added with a stabilizer (4-hydroxy-6-methyl-1, 3, 3a) with a mass percentage concentration of 4% , 7-tetraazaindene) 2.0mL, quickly frozen at 10°C to obtain a tabular silver bromoiodide grain emulsion sensitized by sodium oxalate and sulphur gold.

[0033] Two series of emulsions of Comparative Example 2 and Example 2 were respectively coated on a polyester film b...

Embodiment 3

[0039] Combined sensitization: At a constant temperature of 50°C, sodium oxalate was added as a sensitizer to 100 g of tabular silver bromoiodide grain emulsion obtained in Comparative Example 1, and the addition amount was 1×10 -2 mol / molAg, and then add Na with a concentration of 0.1% by mass according to the conventional sulfur and gold method 2 S 2 O 3 Aqueous solution of 0.6mL, AuCl with a mass percentage concentration of 0.0167% 3 Aqueous solution and 0.2% NH by mass percentage 4 SCN aqueous solution is 1.4mL of gold mixed aqueous solution mixed with a volume ratio of 1:1, matured for 70-110 minutes, and finally added with a stabilizer (4-hydroxy-6-methyl-1, 3, 3a) with a mass percentage concentration of 4% , 7-tetraazaindene) 1.5mL, quickly frozen at 5°C to obtain a tabular silver bromoiodide grain emulsion sensitized by sodium oxalate and sulphur gold.

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Abstract

The invention belongs to the technical field of sensitive materials, and in particular relates to an efficient sensibilization method suitable for a platy silver halides particle emulsion. The method comprises the following steps of: adding 1*10<-5> to 1*10<-1>mol / molAg oxalate serving as a sensibilization agent into the platy silver halides emulsion at the constant temperature of between 45 and 55 DEG C; sequentially adding a Na2S2O3 aqueous solution and a mixed aqueous solution which is obtained by mixing 0.0167 mass percent AuCl3 aqueous solution and 0.2 mass percent NH4SCN aqueous solution according to the volume ratio of 1:1, and curing for 70 to 110 minutes; and adding a stabilizing agent (tissue antagonist of interferon (TAI)), quickly freezing at a low temperature, and thus obtaining the jointly sensibilized platy silver halides particle emulsion. The jointly sensibilized platy silver halides particle emulsion has the sensitivity which is more than 2 times higher than that of an emulsion treated by an individual conventional sulfur-plus-gold sensibilization method, and has smaller fog.

Description

Technical field [0001] The invention belongs to the technical field of photosensitive materials, and particularly relates to a high-efficiency sensitization method suitable for plate-shaped silver halide grain emulsions. Background technique [0002] Overcoming the inefficiency of latent image formation and improving the sensitivity is a problem that the silver halide imaging system must always solve. The latent image formation efficiency of modern high-sensitivity emulsions is only 20-25%. The recombination of light-generated holes and electrons is one of the main reasons for the low efficiency of latent image formation. [0003] In order to avoid the recombination of light-generated holes and electrons, people have successively proposed the halogen absorber method (absorption of holes), the doping of iodide ions to the crystallites and the double structure (effectively separating holes and electrons) to reduce the loss of electron recombination and increase its effective utilizat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G03C1/08G03C1/005
Inventor 马望京杨新民赵艳艳段培成刘霞
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI