BS ISO 22891:2013
Current
The latest, up-to-date edition.
Paper. Determination of transmittance by diffuse reflectance measurement
Hardcopy , PDF
English
31-03-2013
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Apparatus
6 Sampling
7 Preparation of test pieces
8 Procedure
9 Calculation
10 Test report
Annex A (normative) - Spectral characteristics
of reflectometers for measuring luminous
reflectance factors
Annex B (informative) - Relationship between
transmittance and opacity
Annex C (informative) - Precision
Bibliography
Defines a method for the calculation of transmittance based upon diffuse reflectance measurements.
| Committee |
PAI/11
|
| DevelopmentNote |
Supersedes 05/30103541 DC. (08/2007)
|
| DocumentType |
Standard
|
| Pages |
22
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
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 ISO2469, 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.
| Standards | Relationship |
| ISO 22891:2013 | Identical |
| ISO 5725-1:1994 | Accuracy (trueness and precision) of measurement methods and results — Part 1: General principles and definitions |
| ISO 2471:2008 | Paper and board — Determination of opacity (paper backing) — Diffuse reflectance method |
| ISO/TR 24498:2006 | Paper, board and pulps — Estimation of uncertainty for test methods |
| ISO 186:2002 | Paper and board — Sampling to determine average quality |
| ISO 2469:2014 | Paper, board and pulps — Measurement of diffuse radiance factor (diffuse reflectance factor) |
| TAPPI T 1200 : 2014 | INTERLABORATORY EVALUATION OF TEST METHODS TO DETERMINE TAPPI REPEATABILITY AND REPRODUCIBILITY |
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