ASTM_D_5326_-_22.pdf

Designation:D532622Standard Test Method forColor Development in Tinted Latex Paints1This standard is issued under the fixed designation D5326;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 covers a procedure for measuring colordevelopment in tinted latex paints,for the purpose of deter-mining the efficiency of colorants,the tintability of base paintsand the potential for poor color uniformity of applied paintfilms.1.2 The values stated in SI units are to be regarded asstandard.The values given in parentheses after SI units areprovided for information only and are not considered standard.The values stated in SI units are to be regarded as standard.Thevalues given in parentheses are mathematical conversions toinch-pound units that are provided for information only and arenot 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,health,and environmental practices and deter-mine the applicability 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-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D16 Terminology for Paint,Related Coatings,Materials,andApplicationsD2244 Practice for Calculation of Color Tolerances andColor Differences from Instrumentally Measured ColorCoordinatesD3924 Specification for Standard Environment for Condi-tioning and Testing Paint,Varnish,Lacquer,and RelatedMaterialsD3925 Practice for Sampling Liquid Paints and RelatedPigmented CoatingsE284 Terminology of AppearanceE1164 Practice for Obtaining Spectrometric Data for Object-Color EvaluationE1331 Test Method for Reflectance Factor and Color bySpectrophotometry Using Hemispherical GeometryE1345 Practice for Reducing the Effect of Variability ofColor Measurement by Use of Multiple MeasurementsE1347 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)Geometry3.Terminology3.1 Definitions:3.1.1 color development,nthe extent to which the coloranthas achieved its full tinting potential,as evidenced by the colorchange or lack thereof,when the tinted paint is subjected tovery strong shear stress.3.1.2 tintability,nthe capability of a white or tint basepaint to accept various colorants,as evidenced by the colordevelopment in the mixture.3.1.2.1 DiscussionSometimes called“color acceptance.”3.2 See Terminology D16,E284,and the Paint/CoatingsDictionary3for definitions of other terms used in this testmethod.4.Summary of Test Method4.1 The test paint is applied by drawing it down on a stripedblack and white sealed chart,at a film thickness sufficient toobtain full hiding.4.2 A portion of the drawdown is subjected to strongshearing forces in a prescribed brushing procedure.4.3 The CIELAB color difference between the drawdownand sheared areas after drying,is reported as a measure ofdeficiency in the color development of the test paint.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 edition approved Jan.1,2022.Published January 2022.Originallyapproved in 1992.Last previous edition approved in 2013 as D5326 94a(2013).DOI:10.1520/D5326-22.2For 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.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.Significance and Use5.1 A colorant sometimes fails to disperse completely in abase paint due to poor compatibility,which can be the fault ofthe colorant,the paint,or both.This will result in poor colordevelopment,which is readily mani