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  • BS ISO 22891:2013

    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:  31-03-2013

    Publisher:  British Standards Institution

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    Table of Contents - (Show below) - (Hide below)

    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

    Abstract - (Show below) - (Hide below)

    Defines a method for the calculation of transmittance based upon diffuse reflectance measurements.

    Scope - (Show below) - (Hide below)

    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.

    General Product Information - (Show below) - (Hide below)

    Committee PAI/11
    Development Note Supersedes 05/30103541 DC. (08/2007)
    Document Type Standard
    Publisher British Standards Institution
    Status Current
    Supersedes

    Standards Referencing This Book - (Show below) - (Hide below)

    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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