影像科学与光化学 ›› 1999, Vol. 17 ›› Issue (2): 150-154.DOI: 10.7517/j.issn.1674-0475.1999.02.150

• 研究简报 • 上一篇    下一篇

卤化银乳剂的热增感效应研究

瑞青, 郑彤, 王荣琴   

  1. 中国科学院感光化学研究所, 北京100101
  • 收稿日期:1998-05-08 修回日期:1998-11-10 出版日期:1999-05-20 发布日期:1999-05-20
  • 通讯作者: 王荣琴

THERMAL SENSITIZATION EFFECT OF SILVER HALIDE EMULSION

YANG Rui-qing, ZHENG Tong, WANG Rong-qin   

  1. Institute of Photographic Chemistry, The Chinese Academy of Sciences, Beijing 100101, P. R. China
  • Received:1998-05-08 Revised:1998-11-10 Online:1999-05-20 Published:1999-05-20

摘要: 温度对卤化银胶片感光度的影响很早就有人进行过研究.在1934年,Webb[1]研究了不同温度下卤化银乳剂的互易率曲线,并发现温度对感光度的影响与照度有关.当照度很低时,在一定温度范围内感光度会随温度的降低而升高;在高照度下,随温度的升高感光度也增高.此后有许多人从不同角度对这一问题进行了研究,但其侧重点一是考虑温度对互易率失效的影响,二是研究的温度范围偏重于低温,实验温度一般都在50℃以下.而更高温度对感光度的影响则鲜见报道.

关键词: 热增感, 红外预增感, 感光化学

Abstract: The temperature dependence of sensitivity of a finegrain silver iodobromide emulsion sensitized by different sensitizers was determined in a temperature range between 25 to 100℃ at an exposure time of one millisecond. In a result, the sensitivity increases with increasing temperature for all the samples except which was sulfursensitized. For a sulfursensitized emulsion, the sensitivitiy first increases as temperature increasing, and then decreases when temperature is over 50℃. Some factors were discussed as the reason for causing the thermal sensitization effect. In conclution, it is considered that the thermal sensitization effect plays an important part in the infrared presensitization phenomenon that was first observed by G. F. Frazier.

Key words: thermal sensitization, infrared presensitization, photographic chemistry