Designation:D824–94(Reapproved2002)AnAmericanNationalStandardStandardTestMethodforRateofAbsorptionofWaterbyBibulousPapers1ThisstandardisissuedunderthefixeddesignationD824;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationoftherateatwhichanunsizedandabsorbentpaperwillabsorbwaterbymeasuringthetimerequiredforthepapertoabsorbcompletelyaspecifiedquantityofwater(1-4).21.2Thistestmethodisnotintendedforsizedpapersorthosehavinganabsorptiontimeofover120s.SuchpapersshouldbetestedinaccordancewithTestMethodD779orISO535.1.3Forinkabsorptionofblottingpaper,seeTestMethodD2177.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:D585PracticeforSamplingandAcceptingaSingleLotofPaper,Paperboard,Fiberboard,andRelatedProduct3D685PracticeforConditioningPaperandPaperProductsforTesting3D779TestMethodforWaterResistanceofPaper,Paper-board,andOtherSheetMaterialsbytheDry-IndicatorMethod3D1193SpecificationforReagentWater4D2177TestMethodforInkAbsorptionofBlottingPaper3E122PracticeforCalculatingSampleSizetoEstimate,withaSpecifiedTolerableError,theAverageforaChar-acteristicofaLotorProcess52.2OtherStandard:ISO535PaperandBoard—WaterAbsorption(CobbTest)63.SummaryofTestMethod3.1Ameasureddropofwaterisplacedonthepaperandthetimetodisappearanceoftheshinefromthewetareaisdetermined.4.SignificanceandUse4.1Therateofwaterabsorptionisanextremelyimportantpropertyofmostsanitaryproductssuchaspapertowelingandtissues.5.Apparatus5.1Drop-MeasuringDevice,forDeliveryof1-mLand0.1-mLdrops,with1-mLcapacityormore,forexample,measuringpipet(5),buret,orh...
