ISO INTERNATIONAL STANDARD 16474-4 Firstedition 2013-11-15 PaintsandvarnishesMethodsof exposuretolaboratorylightsources Part 4: Open-flamecarbon-arclamps Peintures et vernis-Methodes d'exposition a des sources lumineuses delaboratoire- Partie 4: Lampes d arc au carbone Referencenumber ISO16474-4:2013(E) ISO IS016474-4:2013(E) Contents Page Foreword .iv Introduction. .. 1 Scope. .1 2 Normativereferences .1 3 Terms and definitions .1 4 Principle 2 5 Apparatus .2 5.1 Laboratorylight source .2 5.2 Testchamber 6 5.3 Radiometer 6 5.4 Black-standard/black-panelthermometer 6 5.5 Wettingandhumidity-controlequipment 5.6 Specimen holders 5.7 Apparatustoassesschangesinproperties 1 6 Test specimens. 7 7 Exposure conditions 7 7.1 Temperature 7 7.2 Relative humidity of chamber air .8 7.3 Spraycycle 8 8 Procedure .8 8.1 General. 8 8.2 Mounting thetest specimens .8 8.3 Exposure. .8 8.4 Duration of test. .9 8.5 Measurementofradiantexposure .9 8.6 Determinationofchangesinpropertiesafterexposure .9 9 Testreport .9 Bibliography 10 IS016474-4:2013(E) Foreword Iso (theInternational OrganizationforStandardization)isaworldwidefederation ofnational standards bodies (isO member bodies).The work of preparing International Standards is normally carried out through IsO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations,governmental and non-governmental, in liaison with Iso, also take part in the work. ISo collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnicalstandardization, The procedures used to develop this document and those intended for its further maintenance are describedintheIso/IEcDirectives,Part1.Inparticularthe different approvalcriterianeededforthe different types of isO documents should be noted. This document was drafted in accordance with the editorialrulesoftheISO/lEcDirectives,Part2.www.iso.org/directives Attentionis drawntothepossibilitythat some of the elements of this documentmaybe the subject of patent rights.IsO shall not be held responsible for identifying any or all such patent rights.Details of anypatent rightsidentified during thedevelopment ofthedocument will bein the Introduction and/or on theIsolist of patentdeclarations received.www.iso.org/patents Any trade name used in this document is information given for the convenience of users and does not constituteanendorsement. For an explanation on the meaning of Iso specific terms and expressions related to conformity assessment,as wellas informationaboutIsO'sadherencetotheWTOprinciples intheTechnical Barriers toTrade(TBT)seethefollowingURL:Foreword-Supplementaryinformation ThecommitteeresponsibleforthisdocumentisISo/TC35,Paintsandvarnishes,Subcommittee SC9, Generaltestmethodsforpaintsandvarnishes. ISo 16474 consists of the following parts, under the general title Paints and varnishes-Methods of exposuretolaboratorylightsources: Part I:General guidance Part2:Xenon-arclamps -Part3:FluorescentUV lamps -Part4:Open-flamecarbon-arclamps