ASTM_D_1003_-_13.pdf

Designation:D100313Standard Test Method forHaze and Luminous Transmittance of Transparent Plastics1This standard is issued under the fixed designation D1003;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.This test method replaces Method 3022 of Federal Test Method Standard 406.1.Scope*1.1 This test method covers the evaluation of specificlight-transmitting and wide-angle-light-scattering properties ofplanar sections of materials such as essentially transparentplastic.Two procedures are provided for the measurement ofluminous transmittance and haze.Procedure A uses a hazeme-ter as described in Section 5 and Procedure B uses a spectro-photometer as described in Section 8.Material having a hazevalue greater than 30%is considered diffusing and should betested in accordance with Practice E2387.1.2 The values stated in SI units are to be regarded asstandard.NOTE1For greater discrimination among materials that scatter a highpercent of light within a narrow forward angle,such as is the case withabraded transparent plastics,adjust the hazemeter and perform measure-ments in accordance with Test Method D1044.1.3 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.NOTE2This test method is not equivalent to ISO 13468-1 andISO/DIS 14782.2.Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD883 Terminology Relating to PlasticsD1044 Test Method for Resistance of Transparent Plastics toSurface AbrasionE259 Practice for Preparation of Pressed Powder WhiteReflectance Factor Transfer Standards for Hemisphericaland Bi-Directional GeometriesE284 Terminology of AppearanceE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodE2387 Practice for Goniometric Optical Scatter Measure-ments2.2 ISO Standards:3ISO 13468-1 PlasticsDetermination of the Total Lumi-nous Transmittance of Transparent MaterialsISO/DIS 14782 PlasticsDetermination of Haze of Trans-parent Materials3.Terminology3.1 DefinitionsTerms applicable to this test method aredefined in Terminologies D883 and E284.3.2 Definitions of Terms Specific to This Standard:3.2.1 haze,nin transmission,the scattering of light by aspecimen responsible for the reduction in contrast of objectsviewed through it.The percent of transmitted light that isscattered so that its direction deviates more than a specifiedangle from the direction of the incident beam.3.2.1.1 DiscussionIn this test method,the specified angleis 0.044 rad(2.5).3.2.2 luminous,adjweighted according to the spectralluminous efficiency function V()of the CIE(1987).3.2.3 luminous transmittance,nthe ratio of the luminousflux transmitted by a body to the flux incident upon it.4.Significance and Use4.1 Light that is scattered upon passing through a film orsheet of a material can produce a hazy or smoky field whenobjects are viewed through the material.Another effect can beveiling glare,as occurs in an automobile windshield whendriving into the sun.4.2 Although haze measurements are made most commonlyby the use of a hazemeter,a spectrophotometer may be used,provided that it meets the geometric and spectral requirements1This test method is under the jurisdiction of ASTM Committee D20 on Plasticsand is the direct responsibility of Subcommittee D20.40 on Optical Properties.Current edition approved Nov.15,2013.Published November 2013.Originallyapproved in 1949.Last previous edition approved in 2011 as D1003-111.DOI:10.1520/D1003-13.2For 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 of Section 5.The use of a spectrophotometer for haze mea-surement of plastics can provide valuable diagnostic data onthe origin of the haze,4and Procedure B is devoted to the useof a spectrophotometer.4.2.1 Procedure A(hazemeter)test values are normallyslightly higher and less variable than Procedure B(spectropho-tometer)test values.4.3 Regular luminous transmittance is obtained by placing aclear specimen at some distance from the entrance port of theintegrating