BS ISO 2426-2:2020 pdf free.Plywood一Classification by surface appearance.Hardwood. BS ISO 2426-2 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 species1) including tropical and temperate hardwood. It...