Adopts ISO2469:2014 to provide a method for determining diffuse radiance factor (formerly “diffuse reflectance factor”) of paper, board and pulps. This change of terminology is an acknowledgement of the fact that many grades of paper now contain added fluorescent whitening agents.
Table of contents
Header
About this publication
Preface
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
5.1
5.2
5.3
5.4
6 Photometric calibration of the instrument and its working standards
6.1 Calibration of the instrument
6.2 Calibration of the working standards for its intended use
6.3 Use of working standards
6.4 Cleaning the working standards
7 Sampling
8 Preparation of the test pieces
9 Procedure
9.1 Verification of calibration
9.2 Measurement
10 Calculation and expression of results
11 Precision
12 Test report
Annex A
A.1 Geometric characteristics
A.1.1
A.1.2
A.1.3
A.1.4
A.1.5
A.1.6
A.1.7
A.1.8
A.1.9
A.2 Photometric linearity
A.3 Spectral characteristics
A.4 Computational procedures
A.5 UV-adjustment
A.6 Fluorescence elimination
Annex B
B.1 Structure of the service
B.2 Standardizing laboratories
B.3 Authorized laboratories
B.4 IR3 Non-fluorescent standards
B.5 Assignment of calibration values to IR3s
Annex C
C.1 Standardizing laboratories
C.2 Authorized laboratories
C.2.1
C.2.2
C.2.3
C.2.4
C.2.5
C.3 IR3 fluorescent reference standards
C.3.1
C.3.2
Annex D
D.1 General
D.2 Measures of uncertainty
D.3 Accepted reference value
D.4 Role of the authorized laboratory
D.5 The calculation of uncertainties by industrial laboratories
D.6 Spectral reflectance factor values and weighted optical parameters
