ISO 2426-1:2020

INTERNATIONAL ISO
STANDARD 2426-1
Second edition
2020-04
Plywood — Classification by surface
appearance —
Part 1:
General
Contreplaqué — Classification selon l'aspect des faces —
Partie 1: Généralités
Reference number
©
ISO 2020
© ISO 2020
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ii © ISO 2020 – All rights reserved

Contents  Page
Foreword .iv
1  Scope . 1
2  Normative references . 1
3  Terms and definitions . 1
4  Classification by surface appearance . 1
4.1 Classes . 1
4.2 Characteristics and defects taken into consideration . 1
4.2.1 Determination of appearance class . 1
4.2.2 Characteristics inherent in wood . 1
4.2.3 Manufacturing defects . 2
4.3 Classification by appearance of panels . 3
5  Rules for classification . 3
5.1 Classification for hardwood and softwood . 3
5.2 Conditions of admissibility for inherent characteristics of wood, and
manufacturing defects . 3
5.2.1 General. 3
5.2.2 Joints . 4
5.2.3 Inclusions . 4
5.2.4 Repairs . 4
Foreword
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This document was prepared by Technical Committee ISO/TC 89, Wood-based panels, Subcommittee
SC 3, Plywood.
This second edition cancels and replaces the first edition (ISO 2426-1:2000), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— In the scope it is precised that, this document concerns plywood made of hardwood including tropic
...