1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationPaints and varnishes Coating materials and coating systems for exterior wood Assessment of air inclusions/microfoam in coating filmsPD CEN/TS 16358:2012National forewordThis Publ
2、ished Document is the UK implementation of CEN/TS 16358:2012.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
3、 does 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 76732 6ICS 87.040Compliance with a British Standard cannot confer immunity fromlegal
4、obligations.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 16358:2012TECHNICAL SPECIFICATION SPCIFICATION TECHNIQUE TECHNISCHE SPEZIFIKAT
5、ION CEN/TS 16358 July 2012 ICS 87.040 English Version Paints and varnishes - Coating materials and coating systems for exterior wood - Assessment of air inclusions/microfoam in coating films Peintures et vernis - Produits de peintures et systmes de peintures pour le bois en extrieur - Evaluation des
6、 bulles et microbulles dair dans les feuils de peinture Beschichtungsstoffe - Beschichtungsstoffe und Beschichtungssysteme fr Holz im Auenbereich - Beurteilung von Lufteinschlssen/Mikroschaum in Beschichtungsfilmen This Technical Specification (CEN/TS) was approved by CEN on 9 April 2012 for provisi
7、onal 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 required to announce
8、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 conversion of the CE
9、N/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, Luxembourg, Malta,
10、 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 All rights of
11、 exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. CEN/TS 16358:2012: EPD CEN/TS 16358:2012CEN/TS 16358:2012 (E) 2 Contents Page Foreword 31 Scope 42 Principle 43 Procedure .44 Test report 5PD CEN/TS 16358:2012CEN/TS 16358:2012 (E) 3 Foreword This docume
12、nt (CEN/TS 16358:2012) has been prepared by Technical Committee CEN/TC 139 “Paints 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 respo
13、nsible for identifying any or all such patent rights. According to the CEN/CENELEC 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,
14、Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, 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 16358:2012CEN/TS 1
15、6358:2012 (E) 4 1 Scope This Technical Specification specifies a test method for assessing microfoam in coating films on stable wood components. Samples are taken from finished wood components that are produced in a production plant, by craftsmen or a laboratory. 2 Principle Microfoam in coating fil
16、ms is assessed by counting the quantity of air inclusions on the cross section of a coated sample along a distance of 10 mm using a microscope with min. 80 magnification. NOTE This method does not include measurement of size of air inclusions on cross sections of the coating film. This would not giv
17、e evidence on the real size of air inclusions, because the measured diameter depends on the position where an air bubble is cut at random. 3 Procedure Three test samples of coated wood are collected in a distance of min. 200 mm from the corner joints or end grain. It is recommended to collect full c
18、ross sections of the wooden window profiles of the frame and casement which enables the assessment of microfoam on all coated surfaces. Clean cross sections of the coating and wood substrate are produced using razor blades or a microtome over a length of min. 15 mm on each position where assessment
19、shall be carried out. Figure 1 shows a possible shape of samples for easy preparation of cross sections. Samples may be moistened to ease cutting of cross sections. On each sample a distance of 10 mm is marked within the prepared cross section by razorblade or microtome cuts. PD CEN/TS 16358:2012CEN
20、/TS 16358:2012 (E) 5 Dimensions in millimetres Key 1 coating 2 wood substrate 3 air inclusions Figure 1 Preparation of samples for the assessment of microfoam Assessment of microfoam is carried out by observing the cross section of the coating using a microscope with min. 80 magnification. Within th
21、e marked distance of 10 mm all air inclusions that were cut through during sample preparation are counted. When assessing transparent or semi-transparent coatings a dye shall be used to distinguish between air inclusions which are cut through and those which are not. Dyeing can be done with a marker
22、 pen. After assessing microfoam on all three samples a mean value of air inclusions per centimetre is calculated. 4 Test report The test report shall contain at least the following information: a) reference to this Technical Specification; b) name and address of the testing laboratory; c) type of ap
23、paratus used; d) identification number of the test report; e) name and address of the organisation or the person who ordered the test; f) date and person responsible for the sampling; g) date of receipt of the coating system tested; h) test results; i) authorisation date of the test report. PD CEN/T
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