ASTM_D_6819_-_02e2.pdf

Designation:D 6819 02e2An American National StandardStandard Test Method forAccelerated Temperature Aging of Printing and WritingPaper by Dry Oven Exposure Apparatus1This standard is issued under the fixed designation D 6819;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon(e)indicates an editorial change since the last revision or reapproval.e1NOTEIn 6.1,“forced-ventilation oven”was editorially changed to“forced-convection oven”in March 2003.e2NOTEReference to a research report was added in September 2003.1.Scope1.1 This test method describes a laboratory procedure foraccelerating the aging of printing and writing paper withinsealed glass tubes through exposure to elevated temperaturewithin an oven.1.2 This test method applies to all types of printing andwriting paper whether it is plain base paper,has internaladditives,is coated,is printed or contains any variants ofprinting and writing paper found in normal usage.1.3 This test method specifies the sample preparation andconditions of exposure required to obtain information on thestability of paper to aging with regard to changes in mechanicalstrength properties brought about by exposure of such paper toelevated temperature.1.4 This test method provides the means to compare thestability of different papers on a relative basis,but does notattempt to project the exact life expectancy for a given paper.Life expectancy depends in large part on the limits of accept-ability beyond which various paper properties are no longeruseful,as defined by end-users.For a given paper,those limitswill be different for different end-users.This test method doesnot provide a means to measure or to calculate such lifeexpectancy.1.5 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:D 585 Practice for Sampling and Accepting a Single Lot ofPaper,Paperboard,Fiberboard,and Related Products2D 644 Test Method for Moisture Content of Paper andPaperboard by Oven Drying2D 685 Practice for Conditioning Paper and Paper Productsfor Testing2D 689 Test Method for Internal Tearing Resistance of Pa-per2D 828 Test Method for Tensile Properties of Paper andPaperboard Using Constant-Rate-of-Elongation Appara-tus2D 1968 Terminology Relating to Paper and Paper Products2D 2176 Test Method for Folding Endurance of Paper by theM.I.T.Tester2D 5804 Test Methods for Zero-Span Tensile Strength(“DryZero-Span Tensile”)23.Terminology3.1 DefinitionsDefinitions shall be in accordance withTerminology D 1968.For terms used in this specificationwhich are not provided by Terminology D 1968,see theDictionary of Paper.34.Summary of Test Method4.1 In this test method conditioned samples of printing andwriting paper are placed inside airtight glass tubes to retainmoisture and air.They are then aged at a constant elevatedtemperature in a well-controlled laboratory oven for a fixed testperiod.The aging of paper due to its interaction with moistureand air is accelerated at the elevated temperature.Mechanicalstrength properties of the paper are measured before and afterthe aging process.The extent of retention of these propertiesprovides a measure of the physical strength stability of thepaper as it relates to its aging.5.Significance and Use5.1 This test method will find use by parties concerned withthe relative level of physical strength stability over time ofvarious printing and writing papers.5.2 The test will provide manufacturers,paper users andother interested parties with rankings of paper stability that1This test method is under the jurisdiction of ASTM Committee D06 on Paperand Paper Products and is the direct responsibility of Subcommittee D06.92 on TestMethods.Current edition approved Aug.10,2002.Published October 2002.2Annual Book of ASTM Standards,Vol 15.09.3Available from the Technical Association of the Pulp and Paper Industry(TAPPI),P.O.Box 105113,Atlanta,GA 30348,5th ed.,1996.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.identify papers that will be stable and those that will beunstable when aged under normal conditions of use andhandling over time.5.3 The stability rankings may be used for definition of thestability of a given printing and writing paper to aging overtime when subjected to reasonable conditions of use andhandling.These rankings will not define specific periods of lifeexpectancy,as the limit of mechanical strength propertyacceptability will be different for various users of a givenpaper.6.Apparatus6.1 Use a laboratory forced-convection oven that maintainsa uniform temperature of 100 6 1.0C.6.2