<p>ISO 22891:2007 specifies a method for the calculation of transmittance based upon diffuse reflectance measurements.</p>
<p>The use of the method is restricted to white and near-white translucent papers. 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.</p>
Registration number (WIID)
35197
Scope
<p>ISO 22891:2007 specifies a method for the calculation of transmittance based upon diffuse reflectance measurements.</p>
<p>The use of the method is restricted to white and near-white translucent papers. 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.</p>
