1、Designation:D515092(Reapproved 2017)Standard Test Method forHiding Power of Architectural Paints Applied by Roller1This standard is issued under the fixed designation D5150;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of
2、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 measures the ability of a paint to hideor obscure a surface to which it has been applied by a practicalapp
3、lication procedure.This test method covers the use of apaint roller,but the concept is expected to work equally wellwhen the application tool is a paint brush or paint pad.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversi
4、ons to SI units that are provided for information onlyand are not considered standard.1.3 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
5、determine the applica-bility of regulatory limitations prior to use.1.4 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-men
6、dations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D16 Terminology for Paint,Related Coatings,Materials,andApplicationsD1475 Test Method For Density of Liquid Coatings,Inks,and Related ProductsD2244 Practice for Calculati
7、on of Color Tolerances andColor Differences from Instrumentally Measured ColorCoordinatesD3924 Specification for Environment for Conditioning andTesting Paint,Varnish,Lacquer,and Related Materials(Withdrawn 2016)3D3925 Practice for Sampling Liquid Paints and RelatedPigmented CoatingsE1347 Test Metho
8、d for Color and Color-Difference Mea-surement by Tristimulus Colorimetry3.Terminology3.1 Definitions:3.1.1 hiding power,nthe ability of a paint or paint materialas used to hide or obscure a surface to which it has beenuniformly applied(see Terminology D16).4.Summary of Test Method4.1 The test paint
9、is applied with a roller at a specifiedspreading rate onto a test chart consisting of a series of light todark grey stripes.After drying,a second coat is applied in thesame manner over half of the chart.After the second coat hasdried,both the single-and double-coated areas are evaluatedfor hiding as
10、 judged by the darkest stripe in each area that iscompletely or almost completely obscured.5.Significance and Use5.1 Laboratory hiding power measurements of architecturalcoatings generally employ blade-type applicators that lay downfilms of highly uniform thickness.But practical applicators,such as
11、rollers,pads,and brushes,typically apply films thatlack uniformity due to incomplete leveling,resulting in thepractical hiding power of most paints being less than thatmeasured on films applied with a drawdown blade.This testmethod simulates practical application procedures and condi-tions so as to
12、provide an indication of the actual hidingperformance obtainable when a paint is applied by an experi-enced worker.It is not intended to duplicate painting as doneby the average consumer.5.2 Since the rheological characteristics of a paint and itsinteraction with the applicator are influencing facto
13、rs,rankorder correlation between this test and one done by drawdownmight not be obtained.1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.42 on Architectural Coatings.Current
14、edition approved June 1,2017.Published June 2017.Originallyapproved in 1991.Last previous edition approved in 2013 as D5150 92(2013).DOI:10.1520/D5150-92R17.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMSt
15、andards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis internationa
16、l 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 6.Apparatus6.1 Balance,accurate to 0.1 g.6.2 A Weight/Gallon Cup,or any other type of pycnometersuitable for determining paint density to 0.1 lb/gal.6.3 Paint Roller,3-in.(75-mm),frame,preferably one p