ASTM_D_8090_-_17.pdf

Designation:D809017Standard Test Method forParticle Size Distribution and Shape Analysis of Paints andPigments Using Dynamic Imaging Methods1This standard is issued under the fixed designation D8090;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 the determination of particlesize distribution and particle shape of liquid paints andpigmented liquid coatings by Dynamic Image Analysis.Thismethod includes the reporting of particles 1 m in size and upto 300 m in size.NOTE1Shape is used to classify particles,droplets and bubbles and isnot a reporting requirement.NOTE2The term paint(s)as used in this document includes liquidpaint and liquid pigmented coatings.1.1.1 Some paints may be too viscous to flow through theimaging instrument without dilution which may be used to helpthe paint flow as long as significant contamination is notintroduced into the paint.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.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 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-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,andApplicationsD3925 Practice for Sampling Liquid Paints and RelatedPigmented Coatings2.2 Other Documents:NIST SRM 1982 Thermal Spray Powder Particle SizeDistribution3ISO12103-1 Medium Test Dust3.Terminology3.1 For the definition of terms used in this standard refer toTerminology D16.3.2 Definitions:3.2.1 bubble,na non paint,gaseous formation within thepaint,generally spherical in shape and visible as a thick walledring with a transparent center.3.2.2 droplet,na non paint,liquid formation within thepaint,generally spherical in shape and visible as a thin walledring with a transparent center.3.2.3 projected equivalent particle diameter,nthe diam-eter calculated from the projected area o fa particle if that areaformed a circle,and in equation form isProjected Equivalent Particle Diameter D!5 SQRTArea/4!5=Area/0.785!3.2.4 projected equivalent particle volume(VD),ntheparticle volume based on the projected equivalent particlediameter,and in equation form isProjected Equivalent Particle VolumeVD!5 D36(1)3.2.5 volume fraction,nthe fraction of the total volume ofparticles measured which are below a given percent,and aredenoted as follows:3.2.5.1 Dv10the projected equivalent diameter belowwhich 10%of the total volume of all particles analyzed isrepresented.3.2.5.2 Dv50the projected equivalent diameter belowwhich 50%of the total volume of all particles analyzed isrepresented.1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.24 on Physical Properties of Liquid Paints and Paint Materials.Current edition approved June 1,2017.Published July 2017.DOI:10.1520/D8090-17.2For 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 National Institute of Standards and Technology(NIST),100Bureau Dr.,Stop 1070,Gaithersburg,MD 20899-1070,http:/www.nist.gov.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 3.2.5.3 Dv90the projected equivalent diameter belowwhich 90%of the total volume of all particles analyzed isrepresented.4.Summary of Test Method4.1 Test specimen are fed through the dynamic imaginginstrument which is comprised of a camera sensor and illumi-nation source opposing each other to form a measurement zonewhere the fluid image is captured and then analyzed for particlesize and distribution.The particle size and size distributionvalues are based on the projected equivalent particle diameter.Shape parameters can be used to i