CEN TS 16359-2012 Paints and varnishes - Coating materials and coating systems for exterior wood - Assessment of knot staining resistance of wood coatings《油漆和清漆 涂层材料和涂层系统外部木材染色评估结电.pdf
《CEN TS 16359-2012 Paints and varnishes - Coating materials and coating systems for exterior wood - Assessment of knot staining resistance of wood coatings《油漆和清漆 涂层材料和涂层系统外部木材染色评估结电.pdf》由会员分享,可在线阅读,更多相关《CEN TS 16359-2012 Paints and varnishes - Coating materials and coating systems for exterior wood - Assessment of knot staining resistance of wood coatings《油漆和清漆 涂层材料和涂层系统外部木材染色评估结电.pdf(16页珍藏版)》请在麦多课文档分享上搜索。
1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationPaints and varnishes Coating materials and coatingsystems for exterior wood Assessment of knot stainingresistance of wood coatingsPD CEN/TS 16359:2012National forewordThis Publis
2、hed Document is the UK implementation of CEN/TS 16359:2012.The UK participation in its preparation was entrusted to Technical CommitteeSTI/28, Paint systems for non-metallic substrates.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication d
3、oes not purport to include all the necessary provisions of acontract. Users are responsible for its correct application. The British Standards Institution 2012Published by BSI Standards Limited 2012ISBN 978 0 580 76733 3ICS 87.040Compliance with a British Standard cannot confer immunity fromlegal ob
4、ligations.This Published Document was published under the authority of theStandards Policy and Strategy Committee on 31 July 2012.Amendments issued since publicationAmd. No. Date Text affectedPUBLISHED DOCUMENTPD CEN/TS 16359:2012TECHNICAL SPECIFICATION SPCIFICATION TECHNIQUE TECHNISCHE SPEZIFIKATIO
5、N CEN/TS 16359 July 2012 ICS 87.040 English Version Paints and varnishes - Coating materials and coating systems for exterior wood - Assessment of knot staining resistance of wood coatings Peintures et vernis - Produits de peintures et systmes de peintures pour bois en extrieur - valuation de la rsi
6、stance des revtements pour bois aux taches provoques par les nuds Beschichtungsstoffe - Beschichtungsstoffe und Beschichtungssysteme fr Holz im Auenbereich - Beurteilung der Bestndigkeit von Holzbeschichtungen gegen Astausfrbung This Technical Specification (CEN/TS) was approved by CEN on 9 April 20
7、12 for provisional application. The period of validity of this CEN/TS is limited initially to three years. After two years the members of CEN will be requested to submit their comments, particularly on the question whether the CEN/TS can be converted into a European Standard. CEN members are require
8、d to announce the existence of this CEN/TS in the same way as for an EN and to make the CEN/TS available promptly at national level in an appropriate form. It is permissible to keep conflicting national standards in force (in parallel to the CEN/TS) until the final decision about the possible conver
9、sion of the CEN/TS into an EN is reached. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxe
10、mbourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN
11、 All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. CEN/TS 16359:2012: EPD CEN/TS 16359:2012CEN/TS 16359:2012 (E) 2 Contents Page Foreword 31 Scope 52 Normative references 53 Terms and definitions .54 Test panels .54.1 Wood .54.2 Sampling of
12、 coating products 84.3 Preparation of coated panels .85 Equipment 85.1 Apparatus for accelerated ageing 85.2 Apparatus for colour measurements .86 Procedure of exposure 87 Measurements 87.1 Measurement of colour difference .87.2 Calculation of E* 97.3 Statistical evaluation .97.4 Flow diagram for te
13、st 98 Test report . 10Annex A (informative) Explanatory notes 11A.1 General . 11A.2 Wood material . 11A.3 Impregnation . 11A.4 Precision 11Bibliography . 12PD CEN/TS 16359:2012CEN/TS 16359:2012 (E) 3 Foreword This document (CEN/TS 16359:2012) has been prepared by Technical Committee CEN/TC 139 “Pain
14、ts and varnishes”, the secretariat of which is held by DIN. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENEL
15、EC Internal Regulations, the national standards organizations of the following countries are bound to announce this Technical Specification: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary
16、, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. PD CEN/TS 16359:2012CEN/TS 16359:2012 (E) 4 Introduction The treatment of exterior wood surfaces has both ae
17、sthetic and protective functions. A vital purpose of a coating system is to protect against discoloration caused by wood extractives. Discoloration can be characterised as tannin staining or as knot staining. This document provides a method for assessment of discoloration of coatings on wood caused
18、by wood extractives in knots, i.e. it relates to knot staining only. PD CEN/TS 16359:2012CEN/TS 16359:2012 (E) 5 1 Scope This Technical Specification specifies a test method for assessing the discoloration of coating systems on wood due to wood extractives from knots. The discoloration is measured b
19、y colorimetry and the result is stated as the colour difference between the coated surface on the knot and the coated surface beside the knot. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. F
20、or dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 14298, Sawn timber Assessment of drying quality EN ISO 4892-2:2006, Plastics Methods of exposure to laboratory light sources Part 2: Xenon
21、-arc lamps (ISO 4892-2:2006) EN ISO 15528, Paints, varnishes and raw materials for paints and varnishes Sampling (ISO 15528) ISO 554, Standard atmospheres for conditioning and/or testing Specifications ISO 7724-2, Paints and varnishes Colorimetry Part 2: Colour measurement ISO 7724-3, Paints and var
22、nishes Colorimetry Part 3: Calculation of colour differences 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 tannin staining appearance of discoloration on coated surfaces caused by wood extractives in the substrate 3.2 knot staining appearan
23、ce of discoloration on coated surfaces caused by wood extractives in knots 3.3 wood extractives low-molecular wood components soluble in organic solvents or water 3.4 sound knot knot that, at the relevant surface, is intergrown with the surrounding wood along more than 75 % of its circumference and
24、is free of decay SOURCE: EN 844-9:1997, 9.1.14 and EN 844-9:1997, 9.1.18. 4 Test panels 4.1 Wood The raw material for the test panels shall be panels of pine (Pinus silvestris) free from visible cracks, blue stain, bacterial attack and rot damage. The panels shall be dried to target moisture content
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