卤化银微晶体灰雾显影的研究

STUDY ON FOG DEVELOPMENT OF SILVER HALIDE MICROCRYSTALS

本文研究了卤化银乳剂经硫、金化学敏化后在Ｄ－１９ｂ和ＣＤ－４为显影剂的显影液中的灰雾显影。实验结果表明，经硫、金敏化的乳剂在Ｄ－１９ｂ显影液中灰雾显影所产生的密度均比在ＣＤ－４显影液中灰雾显影所产生的密度大。在Ｄ－１９ｂ显影液中一些硫敏化乳剂比金敏化乳剂灰雾显影密度大，但这些硫敏化乳剂在ＣＤ－４显影液中的灰雾显影密度却比同一金敏化乳剂的灰雾显影密度小。这些实验结果与硫、金敏化的两种乳剂分别在Ｄ－１９ｂ和ＣＤ－４显影液中灰雾显影动力学研究的结果完全一致。灰雾显影动力学的实验结果指出，硫、金化学敏化在Ｄ－１９ｂ和ＣＤ－４显影液的灰雾显影中对灰雾形成的影响有显著的区别。在Ｄ－１９ｂ显影液中硫敏化乳剂比金敏化乳剂灰雾显影的速度常数大，活化能低，而在ＣＤ－４显影液中则相反，硫敏化乳剂比金敏化乳剂灰雾显影的速度常数小、活化能高。

The fog development of silver halide emulsion with sensitizers of of sulphur and gold indevolopers D-19b and CD-4 were studied.The experimental results showed that the fogdensity produced by both sensitizers of sulphur and gold in D-19b developer is greater thanthat in CD-4 one,Moreover,in some sulphur levels the fog produced by sulphur sensitization is much larger than that gold sensitization in the developer D-19b,and whereas it issmaller in the developer CD-4 in comparison with that by the same gold level sensitization.These results were in consonant with the study of the fog developing dynamics of sulphurand gold sensitization in the developers D-19b and CD-4.These results indicated that sulphur sensitization is distinctly diffrent from gold one for the influence on the fog formation in the fog developing processes.The fog formation rate constants of the emulsion with the sensitizer of sulphur is greater than one with sensitizer of gold,and the fog development activation energy of the emulsion with sensitizer of sulphur is smaller than one with the sensitizerof gold in the developer D-19b.Conversely,the fog formation rate constants of the emulsionwith sensitizer of sulphur is smaller than one with sensitizer gold,and the fog development activation energy of the emulsion with sensitizer of sulphur is greater than one with sensitizergold in the developer CD-4.