1、Designation:D 6833 02e1An American National StandardStandard Test Method forAccelerated Pollutant Aging of Printing and Writing Paperby Pollution Chamber Exposure Apparatus1This standard is issued under the fixed designation D 6833;the number immediately following the designation indicates the year
2、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.e1NOTEReference to a research report was added September 2003.1.Scope1.1 T
3、his test method describes a laboratory procedure forthe exposure of printing and writing paper to common atmo-spheric pollutant gas at elevated levels of concentration topermit accelerated aging of such paper.1.2 This test method specifies the sample preparation andconditions of exposure required to
4、 obtain information on therelative stability of paper with regard to change in mechanicalstrength and optical properties brought about by exposure ofsuch paper to common atmospheric pollutant gas.1.3 This test method provides qualitative results regardingpaper stability and does not define the exact
5、 life expectancy fora given paper to reach a specified set of strength or opticalproperties.The limit(s)of acceptability for a specified set ofproperties must be defined by each end user and will determinethe life expectancy of the paper to be tested.1.4 This standard does not purport to address all
6、 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 Samplin
7、g and Accepting a Single Lot ofPaper,Paperboard,Fiberboard and Related Products2D 685 Practice for Conditioning Paper and Paper Productsfor Testing2D 1968 Terminology Relating to Paper and Paper Products2D 2176 Test Method for Folding Endurance of Paper by theM.I.T.Tester2E 122 Practice for Choice o
8、f Sample Size to Estimate aMeasure of Quality for a Lot or Process32.2TAPPI Test Method:T 524 Color of Paper and Paperboard(45/0 Geometry)43.Terminology3.1 DefinitionsDefinitions shall be in accordance withTerminology D 1968.For terms used in this specificationwhich are not provided by Terminology D
9、 1968,see theDictionary of Paper.54.Summary of Test Method4.1 In this test method,a specially designed pollutionchamber is used to expose sheets of paper that are separatelyhung in the chamber.Exposure of the paper is to an elevatedconcentration of nitrogen dioxide gas.The gas is circulateduniformly
10、 around the external surfaces of the paper in acontrolled manner and for a specified period of time.The gasreacts chemically with the ingredients of the paper and causeschanges in its physical strength and in its optical properties.Bycomparing initial and final levels of these parameters againstspec
11、ified difference criteria,a measure of the stability of paperstrength and optical properties is obtained.5.Significance and Use5.1 This test method will find use by parties concernedabout the influence of common atmospheric pollutant gases onthe permanence of the physical strength and optical proper
12、tiesof various printing and writing papers.5.2 The test will provide manufacturers,paper users andother interested parties with quantified rankings of paperstability that identify papers that are stable,moderately stableand unstable when exposed to common atmospheric pollutantgases over periods of t
13、ime.5.3 The stability rankings may be used for definition of thestability of paper to pollutant gas exposure,but will not definespecific periods of life expectancy,as the limits of acceptable1This test method is under the jurisdiction of ASTM Committee D06 on Paperand Paper Products and is the direc
14、t responsibility of Subcommittee D06.92 on TestMethods.Current edition approved Sept.10,2002.Published October 2002.2Annual Book of ASTM Standards,Vol 15.09.3Annual Book of ASTM Standards,Vol 14.02.4Available from the Technical Association of the Pulp and Paper Industry,P.O.Box 105113,Atlanta,GA 303
15、48.5Available from TAPPI,5th ed.,1996.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.physical strength and optical properties will be different forvarious users of a given paper.6.Apparatus6.1 Use a test chamber that is designed to provi
16、de a veryuniform flow of pollutant gas(diluted in standard commercialdry air)over all surfaces of individually suspended sheets ofpaper.Utilize materials for construction of the components ofthe chamber exposed to the gas stream that are highly resistantto the corrosive nature of the pollutant gas.6.2 Provide a control system that ensures very precise flowof the pollutant gas into the chamber.The gas concentration inthe pollution chamber shall be monitored and recorded withappropriate equipment