BS ISO 2426‑2:2020 pdf download.Plywood — Classification by surface appearance.
1 Scope
This document specifies the nature and limits of characteristics inherent in wood and manufacturing defects enabling the visual assessment of the plywood for allocation to an appearance class.
This document applies to plywood, the surface veneers of which are made from hardwood species’) including tropical and temperate hardwood.
It does not apply to overlaid panels.
2 Normative reference
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 2426-1, Plywood — Class qication by surface appearance — Part 1: General
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www,iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
4 Classification by surface appearance
4.1 Appearance classes
Assessment of characteristics and defects for determination of appearance class shall be carried out in accordance with ISO 2426-1. Surface classification shall be based on the permissible characteristics and defects within each of the appearance classes as specified in 42.
4.2 Permissible characteristics and defects
4.2.1 General
Each surface shall be individually assigned to one of the appearance classes E, 1, II, III or IV, as defined by the permissible characteristics according to Tabifi. and permissible defects according to TabLel.BS ISO 2426‑2 pdf download.