本实施规程的目的是规定用于漫透射密度测量的密度计的校准方法。本规程适用于用于测量加工过的黑白照相胶片和底片或铸造胶体碳片的密度计。

The purpose of this practice is to specify the means to be employed in the calibration of densitometers utilized in the measurement of diffuse transmission densities.This practice applies to densitometers utilized for the measurement of processed black-and-white photographic films and plates or cast colloidal carbon tablets.