ASTM_D_7073_-_20.pdf

Designation:D707320Standard Guide forApplication and Evaluation of Brush and Roller AppliedPaint Films1This standard is issued under the fixed designation D7073;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 guide describes procedures for the application ofbrush or roller,or both,applied paint films to sealed wallboardfor evaluating application properties.1.2 Because both the application and panel evaluation aresubjective,this guide should be used only for comparativetesting within one laboratory using one operator for each set ofapplications,as the ratings assigned by different laboratoriesmay not agree.1.3 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.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:2D1475 Test Method for Density of Liquid Coatings,Inks,and Related ProductsD3924 Specification for Standard Environment for Condi-tioning and Testing Paint,Varnish,Lacquer,and RelatedMaterialsD3925 Practice for Sampling Liquid Paints and RelatedPigmented CoatingsD4707 Test Method for Measuring Paint Spatter ResistanceDuring Roller ApplicationD5068 Practice for Preparation of Paint Brushes for Evalu-ationD5069 Practice for Preparation of Paint-Roller Covers forEvaluation of Architectural CoatingsD5301 Practice for Physical Characterization of PaintBrushesD5913 Test Method for Evaluation of Cleanability of PaintBrushesE1347 Test Method for Color and Color-Difference Mea-surement by Tristimulus Colorimetry2.2 Other Document:Pictorial Standards of Paint Roller Spatter,shown in thePictorials Standards of Coating Defects33.Summary of Guide3.1 The test paints are applied with either a brush or a rollerat an agreed upon spreading rate onto sealed test panels usingboth one and two coat applications and after drying,the panelsare evaluated for various application properties.4.Significance and Use4.1 Laboratory measurement of application properties ofarchitectural coatings generally employ a blade-type applica-tors that lay down films of highly uniform thickness.Applicators,such as brushes and rollers,typically apply filmsthat lack uniformity due to variations in rheology,film build,flow and leveling properties resulting in the practical hiding ofmost paints being less than that measured on films applied witha blade-type applicator.This guide provides an indication ofthe actual application properties of the paint,as applied by acontractor or consumer.5.Apparatus5.1 Container,to hold paint,for example,a quart can.1This guide is under the jurisdiction of ASTM Committee D01 on Paint andRelated Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.42 on Architectural Coatings.Current edition approved Sept.1,2020.Published December 2020.Originallyapproved in 2005.Last previous edition approved in 2012 as D7073 05(2012).DOI:10.1520/D7073-202For 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.3Available from Federation of Societies for Coatings Technology(FSCT),492Norristown Rd.,Blue Bell,PA 19422-2350,http:/www.coatingstech.org.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.15.2 Good Quality Paint Brush,50 to 100 mm(2 to 4 in.)inwidth with a chiseled tip.NOTE1The applicator should be aware that a brush can be a mixturehaving several chemically different filaments or bristles,or both,in severalcross sections,with different thickness and length.Use the same type andmake of paint brush for all applications.See Practice D5301 for guidance.5.3 Good Quality Paint Roller,typically 75 to 225 mm(3 to9 in.)in length.NOTE2Rollers con