NF ISO 2469, Q03-038 (04/2024)

This document describes the general procedure used to measure the diffuse radiance factor of all types of pulp, paper and board. In particular, it specifies in detail the operating procedures to be followed to calibrate the devices and in Appendix A, the characteristics of the devices to be used to carry out these measurements. This document may be used to measure diffuse radiance factors and related properties of materials containing fluorescent brightening agents provided that the UV content of the illuminance of the device has been adjusted to give the same fluorescence level as a fluorescent reference standard for a selected CIE illuminant, in accordance with the specific International Standard describing the measurement of the property in question. Annex C describes the preparation of fluorescent reference standards.
(Automatic translation from French)