ASTM D1729-1996(2009) 不透明材料色差的目测评估的标准实施规程

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【英文标准名称】:StandardPracticeforVisualAppraisalofColorsandColorDifferencesofDiffusely-IlluminatedOpaqueMaterials
【原文标准名称】:不透明材料色差的目测评估的标准实施规程
【标准号】:ASTMD1729-1996(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:1996
【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】:
【英文主题词】:color;colordifference;colormatching;lighting;viewingconditions;visualexamination&x2014;color;visualexamination&x2014;colordifference;Visualexamination--paints/relatedcoatings/materia
【摘要】:Althoughcolormeasuringinstrumentsarewidelyused,colormatchesareusuallycheckedvisually.Thestandardizationofvisualexaminationhasgreatlyimprovedtheuniformityofproductsandtheaccuracyofcolormatches.Theuseofthispracticeisessentialforcriticalcolormatchingbutisalsorecommendedforanycolorappraisal,suchasthechoiceorapprovalofacolor.Thispracticeiswidelyusedinindustrytochoosecolors,exhibitcolorsreproducibly,inspectincomingmaterials,monitorcolorproducingprocesses,andinspectfinishedgoods.Visualappraisalisparticularlyimportantwhentheproductinspectedisnotofthesamematerialasthecolorstandardtowhichitiscompared.Observers8212;Thispracticeisbasedonthefundamentalassumptionthattheobserverhasnormalcolorvisionandistrainedandexperiencedinobservingandclassifyingcolordifferences.Thesignificanceoftheresultsdependsonthatbeingso.Theselection,evaluation,andtrainingofobserversaretreatedinGuideE1499.Illumination8212;SimulatedaveragedaylightisrecommendedbytheInternationalCommissiononIllumination(CIE),butaslightlybluersimulatednorth-skydaylightcameintowidespreaduseinNorthAmerica,becauseitprovidesaslightlygreaterdistinctionbetweenverypaleyellowandwhite,adistinctionofgreatcommercialimportance.1.1Thispracticespecifiestheequipmentandproceduresforvisualappraisalofthecolorsandcolordifferencesofopaquematerialsthatarediffuselyilluminated.Thesespecificationareofcriticalimportanceincolormatching.Thispracticerequiresjudgmentsbyobserverswithnormalcolorvision.1.2Criticalvisualappraisalofcolorsandcolordifferencesofmaterialssuchasmetallicandpearlescentpaintsrequiresilluminationthatisnearlyageometricsimulationofsunlight,becausesuchdirectionalilluminationpermitsobservationoftheglitterandgoniochromatismthatcharacterizesuchmaterials.Suchviewingconditionsarebeyondthescopeofthispractice.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A26
【国际标准分类号】:17_180_20
【页数】:4P.;A4
【正文语种】:英语