Designation:E1348−15StandardTestMethodforTransmittanceandColorbySpectrophotometryUsingHemisphericalGeometry1ThisstandardisissuedunderthefixeddesignationE1348;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethoddescribestheinstrumentalmeasure-mentofthetransmissionpropertiesandcolorofobject-colorspecimensbytheuseofaspectrophotometerorspectrocolo-rimeterwithahemisphericalopticalmeasuringsystem,suchasanintegratingsphere.1.2Thistestmethodisgenerallysuitableforallfullytransparentspecimenswithoutregardforthespecimenpositionrelativetothetransmissionportoftheinstrument.Translucentspecimens,however,mustbeplacedflushagainstthetrans-missionportofthesphere.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D1003TestMethodforHazeandLuminousTransmittanceofTransparentPlasticsD2244PracticeforCalculationofColorTolerancesandColorDifferencesfromInstrumentallyMeasuredColorCoordinatesE179GuideforSelectionofGeometricConditionsforMeasurementofReflectionandTransmissionPropertiesofMaterialsE284TerminologyofAppearanceE308PracticeforComputingtheColorsofObjectsbyUsingtheCIESystemE805PracticeforIdentificationofInstrumentalMethodsofColororColor-DifferenceMeasurementofMaterialsE1164PracticeforObtainingSpectrometricDataforObject-ColorEvaluation3.Terminology3.1Definitions:3.1.1ThedefinitionsinGuideE179,TerminologyE284,andPracticeE1164areapplicabletothistestmethod.4.SummaryofTestMethod4.1Thistestmethodprovidesaprocedureformeasuringthetransmitta...
