Designation:D5647−07(Reapproved2012)StandardGuideforMeasuringHairinessofYarnsbythePhoto-ElectricApparatus1ThisstandardisissuedunderthefixeddesignationD5647;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisguidecoversthedeterminationofthehairinessofmostfilamentandspunyarnusingaphoto-electricsensorapparatus.Itisnotintendedforuseonnoveltyyarns.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D123TerminologyRelatingtoTextilesD2258PracticeforSamplingYarnforTestingD4849TerminologyRelatedtoYarnsandFibers3.Terminology3.1ForallterminologyrelatingtoD13.58,YarnsandFibers,refertoTerminologyD4849.3.1.1Thefollowingtermsarerelevanttothisstandard:brokenfilament,frayed,fuzzy,hairiness,loopy.3.2Forallotherterminologyrelatedtotextiles,refertoTerminologyD123.4.SummaryofGuide4.1Ayarnispassedthroughaphoto-electricdevicecon-tainingalightbeamthatisinterruptedbytheoccurrenceofprotrudingfibersorfilaments.Bytheuseofadigitalvoltmeterorcomputerinterface,thenumberofprotrudingfibersorfilamentsofaspecificlengthalongaspecifiedsurfacelengthofyarnarecountedandreportedashairiness.5.SignificanceandUse5.1Thephoto-electricmethodformeasuringthehairinessofyarnsisnotrecommendedforacceptancetestingofcom-mercialshipmentssinceexperiencehasshownthatresultsobtainedfrommachinesproducedbyonemanufacturercannotusuallybeverifiedbymachinesproducedbyanothermanu-facturer.Thisguideisintendedtoincreasetheawarenessoftheusertoavailabletechniquesformeasuringhairiness.Insome...
