ASTM_G_147_-_09.pdf

Designation:G14709Standard Practice forConditioning and Handling of Nonmetallic Materials forNatural and Artificial Weathering Tests1This standard is issued under the fixed designation G147;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 Thispracticecoversspecimenpreparation,identification,packing,shipping,handling,and conditioningbefore,during,and after natural and artificial weatheringtesting.1.2 This practice includes details on the conditioning ofspecimens after exposure and before examination.This prac-tice also covers long-term storage of file specimens.1.3 Conditioning in this practice does not refer to thespecific act of exposing the specimens to the weatheringfactors.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.NOTE1There is no equivalent ISO standard describing procedures foridentification,shipping,conditioning,and handling of specimens intendedfor natural or artificial weathering tests.ISO 139 and ISO 291 describeprocedures used for conditioning specimens prior to and during physicalproperty testing.2.Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD1729 Practice for Visual Appraisal of Colors and ColorDifferences of Diffusely-Illuminated Opaque MaterialsD1776 Practice for Conditioning and Testing TextilesD3924 Specification for Environment for Conditioning andTesting Paint,Varnish,Lacquer,and Related MaterialsE41 Terminology Relating To ConditioningG7 Practice for Atmospheric Environmental Exposure Test-ing of Nonmetallic MaterialsG24 Practice for Conducting Exposures to Daylight FilteredThrough GlassG90 Practice for Performing Accelerated Outdoor Weather-ing of Nonmetallic Materials Using Concentrated NaturalSunlightG113 Terminology Relating to Natural and Artificial Weath-ering Tests of Nonmetallic MaterialsG151 Practice for Exposing Nonmetallic Materials inAccel-erated Test Devices that Use Laboratory Light SourcesG152 Practice for Operating Open Flame Carbon Arc LightApparatus for Exposure of Nonmetallic MaterialsG153 Practice for Operating Enclosed Carbon Arc LightApparatus for Exposure of Nonmetallic MaterialsG154 Practice for Operating Fluorescent LightApparatus forUV Exposure of Nonmetallic MaterialsG155 Practice for Operating Xenon Arc Light Apparatus forExposure of Non-Metallic Materials2.2 Other Documents:ISO 139 TextilesStandard Atmosphere for Conditioningand Testing3ISO 291 PlasticsStandard Atmospheres for Conditioningand Testing33.Terminology3.1 The definitions given in Terminologies E41 and G113are applicable to this practice.3.2 Unless otherwise stated,use of the term“specimens”inthis practice refers to specimens of the test material and of anyapplicable reference or control materials included as part of theexposure experiment.3.3 Definitions of Terms Specific to This Standard:3.3.1 handling,nthe management of a specimen betweenexposure periods,or prior to,or after an exposure test.4.Significance and Use4.1 Weathering is an inherently variable science due to thefact that weather itself is variable.In addition,there can bevariability in results in artificial accelerated testing even when1This practice is under the jurisdiction ofASTM Committee G03 on Weatheringand Durability and is the direct responsibility of Subcommittee G03.01 on JointWeathering Projects.Current edition approved Feb.1,2009.Published March 2009.Originallyapproved in 1996.Last previous edition approved in 2002 as G147 02.DOI:10.1520/G0147-09.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 all devices are running identical exposure cycles.Therefore,itis essential to control all factors as much as possible in order toreduce the overall source of error.4.2 Proper handling of specimens is extremely important formaintaining the integrity of the material being evaluated.Damage to specimens caused by improper handling andlabeling can adversely affect the validity of the testingprogram,causing loss of money and time.Improper handlingcan introduce nonstandard procedures into the protocol whichmay be a significant source of