【英文标准名称】:TestMethodforBrightnessofPulp,Paper,andPaperboard(DirectionalReflectanceat457Nm)
【原文标准名称】:纸浆、纸和纸板亮度试验方法(457NM时的定向反射)
【标准号】:ANSI/ASTMD985-1997
【标准状态】:作废
【国别】:美国
【发布日期】:1997
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:纸;亮度(颜色);试验;纸板
【英文主题词】:Board(paper);Brightness(ofcolour);Paper;Testing
【摘要】:Thistestmethoddeterminesthebrightnessofwhite,near-white,andnaturallycoloredpulp,paper,andpaperboard.Brightnessisacommonlyusedindustrytermforthenumericalvalueofthereflectancefactorofasample,withrespecttobluelightofspecificspectralandgeometriccharacteristics.Thistestmethodrequiresaninstrumentemploying45?illuminationand0?viewinggeometry,withtheilluminatingandviewingbeamsadjustedsothattranslucentmaterialsareevaluatedonanarbitrarybutspecificscale(1-4).Thistestmethodisapplicabletoallnaturally-coloredpulps,andpapersandboardmadefrompulps.Themeasurementisnotsuitableforpaperandpaperboardcontainingaddedcoloringmatter(suchasyelloworgreendyestuff)whichappreciablyabsorbslightinthatpartofthespectrumextendingfromabout400to500nm.Coloredpapersmustbemeasuredspectrophotometricallyorcolorimetricallyinordertoobtainmeaningfulresults(TAPPIT442,T524,andT527).Thistestmethodis,however,suitableforpulpsorpaperswhichcontainoptical(fluorescent)brighteningagents.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:Y30
【国际标准分类号】:85_060
【页数】:
【正文语种】:英语