Designation:D4933−16(Reapproved2021)StandardGuideforMoistureConditioningofWoodandWood-BasedMaterials1ThisstandardisissuedunderthefixeddesignationD4933;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisguidecoversstandardproceduresforconditioningandequilibratingwoodandwood-basedmaterialstoconstantmoisturecontent.Theproceduresapplytosolidwood,wood-basedfiberandparticulatematerialsandpanels,andwoodproductscontainingadhesives.Theyareintendedforuseinresearchanddevelopmentactivities,testinglaboratories,qual-itycontrol,andforallotherclassesofproducersandusers.Thisguideincludesbackgroundmaterialontheimportanceofmoisturecontentcontrol,importantdefinitionsandtechnicaldata,possibletypesofapparatus,procedures,andtheimpor-tanceofconditioningtime.Usersshouldrecognizethatthenecessarydegreeofprecisionandbiasvarieswiththeinten-tionsoftheusers.Someresearchandtesting,forexample,mightrequireveryclosecontrolofmoisturecontent,whereascontrolinanindustrialstoragefacilitymightnotrequiresuchclosecontrol.Thisguideoffersproceduresthatincludethesedifferentrequirements.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.ThevaluesoftemperatureindegreesFahrenheitgiveninTableX1.2aremathematicalconversionsthatareprovidedforinformationonlyandarenotconsideredstandard.1.3Thefollowingsafetyhazardscaveatpertainsonlytotheproceduresection,Section6,ofthisguide.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafety,health,andenviron-mentalpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.1.4Thisinternationalstandardwasdevelopedinaccor-dancewithinternationallyrecognizedprinciplesonstandard-izationestablishedintheDecisiononPrinciplesfortheDevelopmentofInternationalSt...
