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BS EN ISO 6504-1:2019 – TC:2020 Edition

BS EN ISO 6504-1:2019 – TC:2020 Edition

$217.84

Tracked Changes. Paints and varnishes. Determination of hiding power – Kubelka-Munk method for white and light-coloured paints

Published By Publication Date Number of Pages
BSI 2020 114
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This document specifies a method for determining the hiding power (spreading rate necessary to give a hiding power of 98 %) of white or light-coloured paints. It is applicable to paint films having the tri-stimulus value of Y ? 70 and hiding power > 80 %. It is not applicable to fluorescent or metallic paints.

PDF Catalog

PDF Pages PDF Title
72 undefined
74 European foreword
Endorsement notice
76 Foreword
77 Introduction
78 1 Scope
2 Normative references
3 Terms and definitions
4 Principle
79 5 Kubelka-Munk equations
80 6 Apparatus and materials
6.1 Substrates
6.1.1 Determination of RB
81 6.1.2 Determination of R∞
6.2 Film applicators
6.3 Reflectometer
6.4 Template
7 Limitations
8 Sampling
9 Procedure
9.1 Determination of R∞
82 9.2 Determination of RB
9.2.1 Preparation of test films
9.2.2 Measurement of reflectance RB
83 9.3 Determination of film thickness
9.3.1 General
9.3.2 Method using polyester film
9.3.3 Method using black glass plates
10 Expression of results
10.1 Calculation of wet film thickness
84 10.2 Calculation of hiding power
11 Precision
11.1 Repeatability (r)
11.2 Reproducibility (R)
12 Test report
85 Annex A (informative) Graphs for determination of St from RB and R∞ for Rg = 0,80
110 Annex B (informative) Table of values of reflectivity R∞ and factor α for Rg = 0,80
111 Annex C (informative) Examples of the calculation of hiding power from measurements of RB and R∞
113 Bibliography

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BS EN ISO 6504-1:2019 - TC
$217.84