ASTM D344-1997(2004) 用擦试外规评定法对涂料相对遮盖力的标准试验方法

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【英文标准名称】:StandardTestMethodforRelativeHidingPowerofPaintsbytheVisualEvaluationofBrushouts
【原文标准名称】:用擦试外规评定法对涂料相对遮盖力的标准试验方法
【标准号】:ASTMD344-1997(2004)
【标准状态】:现行
【国别】:
【发布日期】:1997
【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】:D01.26
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:外观检查(试验);验收检验;覆盖力;涂料;涂漆;试验
【英文主题词】:hidingpower;relativehiding;opacity
【摘要】:Thistestmethodevaluatesthehidingpowerofatestpaintrelativetoacomparisonpaint.Theresultshavesignificanceonlywithinthatrelationship.Itmaybeusedforproductioncontrolorqualitycomparisons.Whenapaintisappliedbybrushoranyotherpracticalmethod,theopacityofthefilmisaffectedbyvariationsinfilmthicknessrelatedtotheapplicationprocedureandtotheapplicationcharacteristicsofthepaint.Twopaintsthathideequallywellbythismethodmightthereforedifferconsiderablywhenappliedwithadoctorblade,sincethelattermethodgivesessentiallyperfectleveling.Differentbrushesorsurfaceapplicationconditionscanlikewisegivedifferentresults.Note18212;TestMethodD2805describesaninstrumentalmethodforquantitativelydetermininghidingpowerwithoutreferencetoamaterialpaintstandard.Thepaintfilmisappliedatauniformthickness(forexample,withadoctorblade),thefilmthicknessismeasuredrigorously,andtheopacityisevaluatedphotometrically.Hidingpoweristherebydeterminedwithahighdegreeofprecision.TestMethodD344islessprecisethanTestMethodD2805,butismorepracticalbecauseitisresponsivetotheapplicationcharacteristicsofpaints,andissimplerinconceptandexecution.1.1Thistestmethodprovidesforthequalitativeandquantitativevisualdeterminationofthehidingpowerofatestpaintrelativetothatofacomparisonpaint.1.2Thistestmethoddescribesonlyabrushoutapplicationprocedureinspecificdetail,butitsconceptsarevalidforothermethodsofapplicationaswell.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G50
【国际标准分类号】:87_040
【页数】:4P.;A4
【正文语种】: