含碘高氯乳剂的制备和性能研究

碘离子掺入到高氯乳剂可以显著提高其感光性能。碘离子掺入到亚表层可增加乳剂的光吸收,提高感光度,增加反差。最佳掺入量为0.6％mol/mol Ag,掺入位置在65％Ag处,KI加入速度约8s。在一定范围内(小于1.5％mol/mol Ag)碘离子掺入亚表层对清晰度没有明显影响。如果铱掺杂的掺杂位置为亚表层,掺杂量为10~(-7)mol/mol Ag,铱络合物可有效地改善含碘高氯乳剂的高照度互易律失效。

A Study of the Preparation and Photographic Properties of the High Chloride Emulsions Containing Iodide

The photographic properties of the high chloride emulsion could be improved obviously by adding iodide ions. The adding of the iodide ions into the subsurface layer of the silver halide crystal could increase the light absorption, sensitivity and contrast of the emulsion. The optimum amount of iodide was found to be 0. 6%mol/mol Ag,and the opti-mum adding position was that when 65% of total silver had been added. When the amount of iodide added was less than 1. 5%mol/mol Ag no significant effect on the image definition was found. The doping of IrCI6-2 could improve high intensi-ty reciprocity failure,if IrC6-2 was doped into the subsurface layer and the doping amount was l0-7mol/mol Ag.