【英文标准名称】:StandardPracticeforVisualEvaluationofMetamerism
【原文标准名称】:位变异构性的外观鉴定的标准实施规程
【标准号】:ASTMD4086-1992a(2007)
【标准状态】:现行
【国别】:
【发布日期】:1992
【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】:E12.11
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:涂漆;评定;涂料;覆层;外观检查(试验)
【英文主题词】:metamerism;visualexamination-color;visualexamination-metamerism
【摘要】:Metamericcolormatchesresultfromtheuseofdifferentcolorants(pigments,dyes,andthelike)inachievingthesamecolormatch.Usually,thepurchaserrequiresthatthecolormatchbenonmetameric;thispracticepermitsthisrequirementtobequicklytestedinbothfieldandlaboratory.Wherenonmetamericmatchesarenotpossibleorpracticable,forcostorotherreasons,somelimitationofmetamerismmayberequired.Theproceduresforestimatingthemagnitudeofmetamerismdescribedinthispracticeprovidemethodsforassessingtheeffectivenessofsuchlimitation.1.1Thispracticedescribesvisualmethodsfordetectingmetamerismandforestimatingthemagnitudeofametamericcolordifference.1.2Thepracticeislimitedtotheconsiderationofilluminantmetamerismandobservermetamerism.Itisnotdesignedtocoverso-calledgeometricmetamerism,inwhichmembersofspecimenpairschangerelativeappearanceastheanglesofilluminationandviewingarechanged,forexample,becausetheyincorporateflakemetalorpearlescentcolorants.1.3Thispracticedoesnotprovideforthecomputationofindicesofmetamerismbaseduponinstrumentalmeasurementofspectralcharacteristics.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G51
【国际标准分类号】:87_040
【页数】:2P.;A4
【正文语种】: