SIST EN 635-2:1996

Plywood - Classification by surface appearance - Part 2: Hardwood

This European Standard specifies the nature and limits of characteristics inherent in wood and manufacturing defects enabling the visual assessment of theplywood for allocation to an appearance class. This classification is a contribution to assessing the finishing suitability of plywood. This part of EN 635 applies to plywood, the surface veneers of which are made from hardwood species. It does not apply to overlaid panels.

Sperrholz - Klassifizierung nach dem Aussehen der Oberfläche - Teil 2: Laubholz

Diese Europäische Norm legt die Art und Zulässigkeit von holzeigenen Merkmalen und fertigungsbedingten Fehlern fest für die Klassifizierung nach dem Aussehen der Oberflächen von Sperrholz. Diese Klassifizierung erleichtert die Beurteilung eines Sperrholzes nach seiner Eignung zur Oberflächenbehandlung. Dieser Teil der EN 635 gilt für Sperrholz, dessen Deckfurniere aus Laubhölzern hergestellt sind. Er gilt nicht für beschichtetes Sperrholz.

Contreplaqué - Classification selon l'aspect des faces - Partie 2: Bois feuillus

La présente norme européenne prescrit la nature et limite les caractéristiques inhérentes au bois et les défauts dus à la fabrication, permettant l'évaluation visuelle des faces de contreplaqué, en vue de la classification selon l'aspect. Cette classification est une contribution à l'estimation de l'aptitude du contreplaqué à la finition. La présente partie de la norme EN 635 s'applique aux contreplaqués dont les placages de faces sont constituées d'essences feuillus. Elle ne s'applique pas aux panneaux revêtus.

Vezan les - Klasifikacija po videzu površine - 2. del: Listavci

General Information

• Status: Published
• Publication Date: 29-Feb-1996
• ICS: 79.060.10 - Plywood
• Technical Committee: LLZ - Les, lesni izdelki in zaščita lesa
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Mar-1996
• Due Date: 01-Mar-1996
• Completion Date: 01-Mar-1996
• Directive: 305/2011 - Regulation (eu) No 305/2011 of the European Parliament and of the Council of 9 march 2011 laying down harmonised conditions for the marketing of construction products and repealing council directive 89/106/eec
• Directive: 89/106/EEC - Construction products
• Ref Project: EN 635-2:1995 - Plywood - Classification by surface appearance - Part 2: Hardwood

Overview

SIST EN 635-2:1996 is a European standard developed by CEN that focuses on the classification of plywood based on surface appearance, specifically for hardwood species. This standard provides a systematic approach to visually assess plywood surfaces, considering natural wood characteristics and manufacturing defects. By defining appearance classes, EN 635-2 helps manufacturers, suppliers, and users determine the finishing suitability of hardwood plywood panels.

This part of the EN 635 series applies exclusively to plywood with surface veneers made from hardwood species; it explicitly excludes overlaid panels. The classification criteria establish clear boundaries for defects and natural wood features, ensuring consistent quality evaluation across the European plywood industry.

Key Topics

• Surface Appearance Classification
  The standard defines various appearance classes for hardwood plywood by specifying allowable wood characteristics and defects visible on the surface. This classification facilitates uniform quality grading.

• Visual Assessment Criteria
  EN 635-2 details the nature and limits of wood features such as knots, discolorations, and grain patterns, as well as common manufacturing defects that affect the visual quality of plywood.

• Finishing Suitability
  The primary practical value of this classification is to support decision-making on how plywood can be effectively finished-for example, whether it is suitable for staining, painting, or veneering based on surface quality.

• Scope Limitation
  The standard explicitly excludes plywood with overlaid surfaces, focusing solely on natural hardwood veneers, thereby targeting products where surface aesthetics of the veneer are critical.

Applications

• Manufacturing Quality Control
  Producers can apply the classification rules to monitor surface quality in hardwood plywood production, ensuring products meet customer and market requirements.

• Supplier-Consumer Agreements
  Standardized surface classifications enable clearer communication and contractual agreements between plywood suppliers and buyers regarding expected surface quality.

• Interior Design and Furniture Making
  Hardwood plywood conforming to specific appearance classes can be selected for visible applications such as furniture, cabinetry, and wall paneling where surface aesthetics are essential.

• Architectural Finishes
  Architects and finishers use EN 635-2 classifications to choose plywood panels that meet the desired visual standards for interior and decorative applications.

Related Standards

• EN 635-1:1990 – Plywood Classification by Surface Appearance - Part 1: Softwood
  Complements EN 635-2 by covering softwood plywood, helping users differentiate classification criteria based on veneer species.

• EN 314-2 – Plywood Bonding Quality
  Addresses adhesive bond quality in plywood, relevant when prioritizing both surface appearance and structural integrity.

• EN 13986 – Wood-Based Panels for Use in Construction
  Provides broader technical requirements for wood panels, including plywood used in building and construction, aligning appearance classification with performance criteria.

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Keywords: EN 635-2, plywood surface classification, hardwood plywood, visual assessment, plywood appearance classes, manufacturing defects, finishing suitability, hardwood veneer plywood, European plywood standards, CEN plywood classification.

Standards Content (Sample)

SLOVENSKI STANDARD
01-marec-1996
Vezan les - Klasifikacija po videzu površine - 2. del: Listavci
Plywood - Classification by surface appearance - Part 2: Hardwood
Sperrholz - Klassifizierung nach dem Aussehen der Oberfläche - Teil 2: Laubholz
Contreplaqué - Classification selon l'aspect des faces - Partie 2: Bois feuillus
Ta slovenski standard je istoveten z: EN 635-2:1995
ICS:
79.060.10 Vezan les Plywood
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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