ASTM_D_6789_-_02_2007.pdf

Designation:D6789 02(Reapproved 2007)An American National StandardStandard Test Method forAccelerated Light Aging of Printing and Writing Paper byXenon-Arc Exposure Apparatus1This standard is issued under the fixed designation D6789;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()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This test method describes a laboratory procedure forthe exposure of printing and writing paper to xenon-arc light atelevated levels of light flux to permit accelerated aging of thattype of paper.1.2 This test method specifies the sample preparation andconditions of exposure required to obtain information on therelative stability of paper with regard to change in opticalproperties brought about by exposure of such paper to light.1.3 This test method provides qualitative results regardingpaper stability and does not define the life expectancy for agiven paper to reach a specified set of optical properties.1.4 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:2D685 Practice for Conditioning Paper and Paper Productsfor TestingD985 Test Method for Brightness of Pulp,Paper,andPaperboard(Directional Reflectance at 457 nm)D1968 Terminology Relating to Paper and Paper ProductsG113 Terminology Relating to Natural andArtificial Weath-ering Tests of Nonmetallic MaterialsG151 Practice for Exposing Nonmetallic Materials in Ac-celerated Test Devices that Use Laboratory Light SourcesG155 Practice for Operating XenonArc LightApparatus forExposure of Non-Metallic Materials2.2ASTM Adjuncts:ASTM Paper Aging Research Program32.3TAPPI Test Methods:4T 254 Cupriethylenediamine Disperse Viscosity of Pulp(Falling Ball Method)T 524 Color of Paper and Paperboard(45/0 Geometry)T 1206 Precision Statement for Test Methods3.Terminology3.1 DefinitionsDefinitions shall be in accordance withTerminology D1968 or Terminology G113.For terms used inthis specification which are not provided by TerminologyD1968 or Terminology G113,see the Dictionary of Paper.44.Summary of Test Method4.1 In this test method,light from a xenon-arc lamp thatmakes use of filters to simulate natural daylight that has passedthrough window glass is shone on a paper surface with lightflux that is substantially greater than in normal indoor condi-tions of paper exposure.The light flux is applied in a controlledmanner and for a specified period of time.The light flux causesphotochemical reactions in the paper that change its reflectance(brightness)and color.By comparing initial and final levels ofthese parameters against difference criteria,a measure ofoptical stability is obtained.5.Significance and Use5.1 This test method will find use by parties concernedabout the relative optical stability of various printing andwriting papers.5.2 The test will provide manufacturers,paper users andother interested parties with quantified rankings of paper1This test method is under the jurisdiction of ASTM Committee D06 on Paperand Paper Products and is the direct responsibility of Subcommittee D06.92 onStandard Documents Relating to Paper and Paper Products.Current edition approved Dec.1,2007.Published December 2007.Originallyapproved in 2002.Last previous edition approved in 2002 as D6789 02.DOI:10.1520/D6789-02R07.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3AvailablefromASTMInternationalHeadquarters.OrderAdjunctNo.ADJD06PAPERAGING.Formerly Research Report D061004.4Available from Technical Association of the Pulp and Paper Industry(TAPPI),15 Technology Parkway South,Norcross,GA 30092,http:/www.tappi.org.1Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.NOTICE:This standard has either been superseded and replaced by a new version or withdrawn.Contact ASTM International(www.astm.org)for the latest informationstability that identify papers that are stable,moderately stableand unstable when exposed to light over periods of time.5.3 The stability rankings may be used for definition of therelative stability of papers to light exposure,but will not definespecific periods of life expectancy of a given paper.6.Apparatus6.1 Provide a test chamber that utilizes a sealed“long-arc”xenon lamp to illuminate the test samples.The lamp spectrumshall be in accordance with Practice G155,as per Table 2 ofthat document.6.2 Use a glass filtration system in front of the l