ASTM D4039-1993(2004) 高光泽表面反射光雾的试验方法

作者:标准资料网 时间:2024-05-04 20:43:18  浏览:9785   来源:标准资料网

【英文标准名称】:StandardTestMethodforReflectionHazeofHigh-GlossSurfaces
【原文标准名称】:高光泽表面反射光雾的试验方法
【标准号】:ASTMD4039-1993(2004)
【标准状态】:现行
【国别】:
【发布日期】:1993
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E12.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:表面;涂料;覆层;颜料;反射特性;涂漆;试验
【英文主题词】:haze;highgloss;reflectionhaze
【摘要】:Measuredglossvaluesofspecimensdependontheangleofillumination,refractiveindexofthematerial,andthegeometricdistributionofthereflectedlight.Hazeisproducedbyirregularitiesinthereflectingsurfacethataffectthedistributionoffluxreflectedaroundthespecularangle.TheproceduresspecifiedinTestMethodD523arenotdesignedtomeasurereflected-fluxscatteringcharacteristicsofhigh-glossfinishes,particularlywherespecimenshavingdifferentsurfacerefractiveindexesarebeingcompared.Abetterindexofscatteringcanbeobtainedbymakingtwospecularreflectancemeasurements,thatis,theuseoftworeceptoraperturesofdifferentsize.Inthistestmethod,valuesforreflectionhazeareobtainedfromtwomeasurementsofspeculargloss,onemadewithalargereceptorapertureandtheothermadewithasmallreceptoraperture.Thegeometricconditionshavebeenchosentopermittheuseofglossmetersthatprovide60x00B0;specularglossmeasurements(largereceptoraperture)and20x00B0;specularglossmeasurements(smallreceptoraperture)asspecifiedinTestMethodD523.AnadditionalmethodforthemeasurementofreflectionhazeisgiveninTestMethodE430.1.1Thistestmethoddescribesaprocedureforusingtwospecularglossmeasurementstoobtainahazeindexforhigh-glossnonmetallicspecimens().Itisparticularlyusefulforevaluatingthehazeinclearfinishesonnonglossysubstrates,andthehazeinreflectedimagesproducedbythesurfacesofopaqueglossypigmentedfinishes.1.2Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G50
【国际标准分类号】:87_040(PAINTSANDVARNISHES)
【页数】:3P.;A4
【正文语种】: