1、Designation:D6578/D6578M13Standard 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 i
2、n 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 coatin
3、gs 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-markin
4、g 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
5、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
6、 safety and health practices and determine the applica-bility of regulatory limitations prior to use.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 Exposu
7、res 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 Nonme
8、tallic 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
9、 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 abil
10、ity 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
11、 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 begi
12、nwith 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 acle
13、anability level based on the mildest cleaning agent thatcompletely removes the graffiti marking without damaging thecoating.5.Significance and Use5.1 Graffiti on building and structures is an ongoing andincreasing problem.A number of coatings have been produced1This practice is under the jurisdictio
14、n 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.1,2013.Published December 2013.Originallyapproved in 2000.Last previous edition approved in 2008 as D6
15、578 08.DOI:10.1520/D6578_D6578M-13.2For 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,10
16、0 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 that are intended to be resistant to the application of a graffitimarking,or to provide a surface from which such markings canbe easily removed.The procedures described in this practiceprovide a standard set of conditions that can be used to evaluatethe graffiti resistance of a surface.5.2 Graffiti resistance determined according to this practiceis applicable to smooth surfaces.Graffiti resistance of the samecoatings