SNZ AS/NZS 1301.565
Methods of test for pulp and paper Method 565: Determination of transmittance by diffuse reflectance measurement
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| Organization: | SNZ |
| Publication Date: | 4 March 2016 |
| Status: | active |
| Page Count: | 20 |
scope:
This International Standard 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.
NOTE This means that, although this International Standard refers to ISO 2469, which permits the use of both filter colourimeters and abridged spectrophotometers, a filter colourimeter with no means of eliminating the emission of fluorescence is not suitable for this type of measurement if fluorescent whitening agents are present.
Document History
SNZ AS/NZS 1301.565
March 4, 2016
Methods of test for pulp and paper Method 565: Determination of transmittance by diffuse reflectance measurement
This International Standard 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...