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【英文标准名称】:Laboratoryglassware;one-markvolumetricflasks,flaskswithglassroundthread
【原文标准名称】:实验室玻璃器皿.第2部分:带玻璃圆螺纹的单刻度量瓶
【标准号】:DIN12664-2-1981
【标准状态】:现行
【国别】:德国
【发布日期】:1981-01
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:容积测量;材料;尺寸;设计;螺纹;测量;作标记;实验室装备;容量瓶;烧瓶;实验室器皿;实验室器具
【英文主题词】:Design;Dimensions;Flasks;Laboratoryapparatus;Laboratoryfurniture;Laboratoryware;Marking;Materials;Measurement;Threads;Volumemeasurement;Volumetricflasks
【摘要】:
【中国标准分类号】:N64
【国际标准分类号】:71_040_20
【页数】:4P;A4
【正文语种】:德语


【英文标准名称】:StandardPracticeforCalculatingYellownessandWhitenessIndicesfromInstrumentallyMeasuredColorCoordinates
【原文标准名称】:计算仪器测量颜色坐标的白色和黄色指数的标准实施规程
【标准号】:ASTME313-2005
【标准状态】:现行
【国别】:
【发布日期】:2005
【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】:(Practice)
【标准水平】:()
【中文主题词】:色度量度;索引;材料;不透明颜料;光学;记录;试验
【英文主题词】:color;colorimetricanalysis;instrumentalmeasurement,color/light;reflectance;reflectivity;whitenessindexes;yellownessindexes
【摘要】:Thispracticeshouldbeusedonlytocomparespecimensofthesamematerialandsamegeneralappearance.Forexample,aseriesofspecimenstobecomparedshouldhavegenerallysimilargloss,texture,and(ifnotopaque)thickness,andtranslucency.Foryellownessmeasurement,thispracticeislimitedtospecimenshavingdominantwavelengthintherange570to580nm,orMunsellhueapproximately2.5GYto2.5Y.Forwhitenessmeasurement,thispracticeislimitedtospecimenshavingMunsellvaluegreaterthan8.3(CIEYgreaterthan65)andMunsellchromanogreaterthan0.5forBhues,0.8forYhues,and0.3forallotherhues(see3.3.1).Thecombinationofmeasurementandcalculationleadingtoindicesofyellownessorwhitenessisapsychophysicalprocess,thatis,theproceduresspecifiedaredesignedtoprovidenumberscorrelatingwithvisualestimatesmadeunderspecifiedtypicalobservingconditions.Becausevisualobservingconditionscanvarywidely,usersshouldcomparecalculatedindiceswithvisualestimatestoensureapplicability.SomestandardsaddressingthevisualestimationofcolorandcolordifferencearePracticesD1535,D1729,E1360,andE1541,andGuideE1499.Thispracticedoesnotcoverthepreparationofspecimens,aprocedurethatmayaffectsignificantlythequantitiesmeasured.Ingeneral,specimensshouldbepreparedandpresentedformeasurementinthemannerthatisstandardforthetestbeingperformed.Selectenoughspecimensorspecimenareastoprovideanaverageresultthatisrepresentativeofeachsampletobetested.SeePracticeE1345.1.1Thispracticeprovidesnumbersthatcorrelatewithvisualratingsofyellownessorwhitenessofwhiteandnear-whiteorcolorlessobject-colorspecimens,viewedindaylightbyanobserverwithnormalcolorvision.Whitetextiles,paints,andplasticsareafewofthematerialsthatcanbedescribedbytheindicesofyellownessorwhitenesscalculatedbythispractice.1.2Foracompleteanalysisofobjectcolors,byaspecifiedobserverandunderaspecifiedilluminant,useofthreeparametersisrequired.Fornear-whitespecimens,however,itisoftenusefultocalculatesingle-numberscalesofyellownessorwhiteness.Thispracticeprovidesrecommendedequationsforsuchscalesanddiscussestheirderivationsanduses,andlimitstotheirapplicability(seealsoRef()).1.3&solely-SI-units;Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:A26
【国际标准分类号】:17_180_20
【页数】:6P.;A4
【正文语种】: