Paper — Determination of transmittance by diffuse reflectance measurement
纸张——用漫反射测量法测定透射率
发布日期:
2013-02-26
ISO 22891:2013规定了基于漫反射测量的透射率计算方法。
该方法仅适用于白色和近白色半透明纸(见3.9)。如果需要测定含有荧光增白剂的纸张的透射率,则使用规定的紫外线截止滤光片消除荧光发射。
ISO 22891:2013 specifies a method for the calculation of transmittance based upon diffuse reflectance measurements.
The use of the method is restricted to white and near-white translucent papers (see 3.9). If it is necessary to determine the transmittance of papers which contain fluorescent whitening agents, the fluorescence emission is eliminated using the prescribed UV cut-off filter.