GB/T 15958-1995 in English

《GB/T 15958-1995黑白电影负片感光度的测定》由TC102（全国感光材料标准化技术委员会）归口，主管部门为中国石油和化学工业联合会。
本标准规定了黑白电影负片感光度的测定。本标准适用于使用通用药品和设备加工的胶片，但也适用于特殊工艺加工的胶片。本标准不适用于黑白照相、航空摄影、制版印刷、射线摄影和显微摄影胶片，也不适用于扩散转移系统的负片。

Scope

This standard specifies the determination of the sensitivity of black and white film negatives. This standard applies to films processed with general medicines and equipment, but also to films processed with special processes. This standard does not apply to black-and-white photographic, aerial photography, graphic printing, radiography, and photomicrography films, nor to negatives for diffusion-transfer systems.