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BS ISO 22891:2013

BS ISO 22891:2013

Current

Current

The latest, up-to-date edition.

Paper. Determination of transmittance by diffuse reflectance measurement

Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

03-31-2013

Publisher

British Standards Institution

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.

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.

Committee
PAI/11
DevelopmentNote
Supersedes 05/30103541 DC. (08/2007)
DocumentType
Standard
Pages
22
PublisherName
British Standards Institution
Status
Current
Supersedes

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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Hardcopy - English
PDF - English
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