CGSB 72.21:1989现行
Micrographics - Diazo And Vesicular Films - Visual Density - Specifications
出版：Canadian General Standards Board
专家解读视频
基本信息
标准编号： CGSB 72.21:1989
发布时间：1989/11/1 0:00:00
标准类别：Standard
出版单位：Canadian General Standards Board
标准页数：0
标准简介
Gives a method for the measurement of diffuse visual density of diazo films, the visual density of vesicular films, and the determination of density values of second generation microfilms.
标准备注
Also numbered as ISO 8126:1986 (05/2001)
等同采用的国际标准
ISO 8126:2000 - Equivalent
