ASTM_D_6578_-_D_6578M_-_13_2018.pdf

Designation:D6578/D6578M13(Reapproved 2018)Standard Practice forDetermination of Graffiti Resistance1This standard is issued under the fixed designation D6578/D6578M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of lastreapproval.A superscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 This practice covers a basic method for evaluatinggraffiti resistance of coatings,and use of this practice toevaluate graffiti resistance of coatings after outdoor or labora-tory accelerated exposure(either prior to or after graffiti isapplied).Graffiti resistance is based on how a defined set ofmarkings is removed by a defined set of cleaning agents.1.2 This practice also defines procedures(optional)toevaluate graffiti removal after re-marking with subsequentre-cleaning.It does not address recoatability after a coating isno longer graffiti resistant.1.3 The values stated in either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the standard.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,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D523 Test Method for Specular GlossD4587 Practice for Fluorescent UV-Condensation Expo-sures of Paint and Related CoatingsD6695 Practice for Xenon-Arc Exposures of Paint andRelated CoatingsE1347 Test Method for Color and Color-Difference Mea-surement by Tristimulus ColorimetryE1349 Test Method for Reflectance Factor and Color bySpectrophotometry Using Bidirectional(45:0 or 0:45)GeometryG7 Practice for Atmospheric Environmental Exposure Test-ing of Nonmetallic MaterialsG113 Terminology Relating to Natural and Artificial Weath-ering Tests of Nonmetallic Materials3.Terminology3.1 The definitions given in Terminology G113 are appli-cable to this practice.3.2 Definitions of Terms Specific to This Standard:3.2.1 cleaning agent,na material used to remove a mark-ing material from the coating surface.3.2.2 graffti resistance,nthe property of coatings to beresistant to the application of graffiti or exhibiting removal ofgraffiti without surface damage.3.2.3 marking material,na material that can be used toproduce graffiti.3.2.4 recleanability,nthe ability of a coating to withstandmultiple cycles of marking with subsequent cleaning whilemaintaining its original characteristics.3.2.5 repellent,nthe property of coatings that preventsmaterials commonly used as graffiti markings,from forming acontinuous film upon application.4.Summary of Practice4.1 A series of materials typically used as graffiti markingsis applied to test panels of the surface being evaluated.Testspecimens may be exposed to outdoor or accelerated exposures(either before or after markings have been applied).The graffitimarkings are removed using a series of procedures that beginwith wiping with a dry cloth and end with cleaning the surfacewith an aggressive cleaner.After the best attempt has beenmade to remove markings,specimens are evaluated visually,oralternatively,by gloss and color change measurements todetermine cleanliness.The graffiti resistance is reported as a1This practice is under the jurisdiction of ASTM Committee D01 on Paint andRelated Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.46 on Industrial Protective Coatings.Current edition approved Nov.1,2018.Published November 2018.Originallyapproved in 2000.Last previous edition approved in 2013 as D6578/D6578M 13.DOI:10.1520/D6578_D6578M-13R18.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 cleanabili