适用于所有用于连续色调或图像摄影的常规卤化银接触和放大纸。该方法基于曝光和处理样本，从合成图像中进行密度测量，以产生感光度曲线，从中进行测量并用于确定ISO速度和ISO范围值。附件A至C涉及底片的纸张范围和有效密度范围、对数曝光范围和对比度、对数曝光范围和平均梯度之间的关系。

Pertains to all conventional silver-halide contact and enlarging papers used for continuous-tone or pictorial photography. The method is based on exposing and processing samples, performing density measurements from the resultant image to produce a sensitometric curve from which measurements are taken and used to determine ISO speed and ISO range values. Annexes A to C deal with the relationships between the paper range and the effective density range of the negative, log exposure range and contrast, and log exposure range and average gradient.