IntroductiontoGB/T2918-2018Plastics-StandardAtmospheresforConditioningandTestingGB/T2918-2018istheChinesenationalstandardthatspecifiesthestandardatmospheresforconditioningandtestingplasticspecimens.ThisstandardisequivalenttoISO291:2008andprovidesguidelinesformaintainingconsistentenvironmentalconditionstoensurereliableandreproducibletestresultsforplasticmaterials.Thestandarddefineskeyparameterssuchastemperature,relativehumidity,andconditioningtime,whicharecriticalforpreparingplasticspecimensbeforemechanical,thermal,orotherphysicalpropertytests.Itcoversvariousconditioningatmospheres,includingstandardlaboratoryconditions(e.g.,23°C±2°Cand50%±10%relativehumidity)andotherspecializedenvironmentsforspecifictestingrequirements.GB/T2918-2018iswidelyusedinresearch,qualitycontrol,andproductdevelopmentwithintheplasticsindustrytoensuretestcomparabilityandcompliancewithinternationalstandards.Itservesasanessentialreferenceforlaboratories,manufacturers,andregulatorybodiesinvolvedinplasticmaterialevaluation.
