ASTM_D_3924_-_16.pdf

Designation:D392416Standard Specification forStandard Environment for Conditioning and Testing Paint,Varnish,Lacquer,and Related Materials1This standard is issued under the fixed designation D3924;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.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This specification defines the standard atmospheres fornormal conditioning and testing of paint,varnish,lacquer,andrelated materials,at approximately ambient conditions.NOTE1See Terminology E41,Specification E171 and Test MethodE337.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.2.Referenced Documents2.1 ASTM Standards:2E41 Terminology Relating To ConditioningE171 Practice for Conditioning and Testing Flexible BarrierPackagingE337 Test Method for Measuring Humidity with a Psy-chrometer(the Measurement of Wet-and Dry-Bulb Tem-peratures)3.Standard Atmosphere3.1 Unless otherwise specified,conditioning and testing ofcoating materials known to be sensitive to variations intemperature or relative humidity shall be carried out in anatmosphere having a temperature of 23 6 2C(73.5 6 3.5F)and a relative humidity of 50 6 10%.If closer tolerances arerequired,61C(62F)or even narrower limits,and 65%relative humidity may be specified.NOTE2The positive and negative deviations from the specified setpoints are maximum allowed operational fluctuations during equilibriumconditions.If the operational fluctuations are beyond the stated tolerances,discontinue the conditioning or testing and correct the cause of thetolerance exceedance before continuing.3.2 The standard room or cabinet shall be well-ventilatedbut free of drafts,dust,products of combustion,and laboratoryfumes.Lighting conditions,unless otherwise specified,shall bethat normally maintained in a room used for paint testpurposes.4.Standard Temperature4.1 Unless otherwise specified,the standard test tempera-ture shall be as specified in Section 3.5.Room Temperature5.1 A temperature in the range from 18 to 29.5C(65 to85F)shall be called room temperature.6.Conditioning and Testing6.1 Unless otherwise specified in the test method,conditionthe organic coating materials or dried test films thereof and thetest equipment for not less than 3 h in the appropriateatmosphere and verify the temperature of the material beforeconducting the test in the same atmosphere.6.2 For routine testing where close temperature control isnot critical,conduct all physical tests on organic coatingmaterials or dried test films thereof at the room temperature of18 to 29.5C(65 to 85F).6.3 For referee testing,unless otherwise specified in the testmethod,conduct all physical tests on organic coating materialsor dried test films thereof in the standard atmosphere asspecified in Section 3.7.Keywords7.1 conditioning environment1This specification is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.20 on Quality Assurance and Statistics.Current edition approved April 1,2016.Published May 2016.Originallyapproved in 1980.Last previous edition approved in 2011 as D3924 80(2011).DOI:10.1520/D3924-16.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 ASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard.Users of this standard are expressly advised that determination of the validity of any such patent rights,and the riskof infringement of such rights,are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised,either reapproved or withdrawn.Your comments are invited either for revision of this standard or for additional standardsand should be addressed to ASTM International Headquarters.Your comments will receive careful consideration at a meeting of theresponsible technical committee,which you may attend.If you feel that your comments have not received a fair hearing you shouldmake your views known to the ASTM Committee on Standards,at the address shown below.This standard is copyrighted by ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.Individual reprints(single or multiple copies)of this standard may be obtained