ASTM_D_1005_-_95_2013.pdf

Designation:D100595(Reapproved 2013)Standard Test Method forMeasurement of Dry-Film Thickness of Organic CoatingsUsing Micrometers1This standard is issued under the fixed designation D1005;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.This standard has been approved for use by agencies of the Department of Defense.1.Scope1.1 This test method covers the measurement of film thick-ness of dried films of paint,varnish,lacquer,and relatedproducts using micrometers.Procedures A and B utilize sta-tionary micrometers and Procedures C and D,hand-heldmicrometers.Procedures A and C are not recommended forfilms less than 12.5 m(0.5 mils)in thickness.The minimumthickness required for Procedures B and D is a function of thatrequired to enable removal of the sample as a free film.1.2 The procedures appear as follows:1.2.1 Procedure AStationary micrometer for measuringcoatings applied to plane rigid surfaces.1.2.2 Procedure BStationary micrometer for measuringfree films.1.2.3 Procedure CHand-held micrometer for measuringcoatings applied to plane rigid surfaces.1.2.4 Procedure DHand-held micrometer for measuringfree films.1.3 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.4This standard does not purport to address the safetyconcerns,if any,associated with its use.It is the responsibilityof the user of this standard to establish appropriate safety andhealth practices and determine the applicability of regulatorylimitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D823 Practices for Producing Films of Uniform Thicknessof Paint,Varnish,and Related Products on Test PanelsD2370 Test Method for Tensile Properties of Organic Coat-ings3.Significance and Use3.1 This test method is particularly applicable to the mea-surement of free films and is also satisfactory for the measure-ment of films on laboratory test panels.3.2 The accuracy and precision of the thickness measure-ments may be influenced by the deformability of the coating.This test method is not applicable to coatings that are readilydeformable under the load of the measuring instrument.3.3 The accuracy and precision of the thickness measure-ments are also influenced by the uniformity of the substratewhen the coatings are applied to laboratory test panels.4.Apparatus4.1 Procedures A and B:4.1.1 The apparatus shall consist of a dial comparator,dialindicator,or micrometer.A rigid base is required for mountingthe dial comparator or dial indicator gages.The presser foot ofthe micrometer or dial indicator shall be circular,from 1.5 to3.0 mm(116to18in.)in diameter,and shall be flat on thebottom.The presser foot shall be fixed to an indicator that readsto 2.5 m(0.1 mil).The load on the presser foot shall bebetween 140 and 275 kPa(20 and 40 psi).For Procedure B,asmooth uncoated test plate is also required.4.1.2 Verify the accuracy of instrument calibration by set-ting to zero with the anvils closed followed by measuringshims of known thicknesses or standards specifically designedfor this purpose.Record the standard thickness gage measure-ment and the micrometer reading.Use these results to constructa calibration curve.4.2 Procedures C and DThe apparatus shall consist of ahand-held micrometer.The anvils of the micrometer shall becircular,from 1.5 to 3.0 mm(116to18in.)in diameter,withflat bottoms.Verify the accuracy of instrument calibration bysetting to zero with the anvils closed followed by measuringshims of known thicknesses or standards specifically designed1This test method is under the jurisdiction of ASTM Committee D01 on Paintand Related Coatings,Materials,and Applications and is the direct responsibility ofSubcommittee D01.23 on Physical Properties of Applied Paint Films.Current edition approved July 1,2013.Published July 2013.Originally approvedin 1949.Last previous edition approved in 2007 as D1005 95(2007).DOI:10.1520/D1005-95R13.2For 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,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 for this purpose.Record the standard thickness gage measure-ment and the micrometer reading.Use these results to constructa calibration curve.5.Test Specimen5.1 Procedures A and CApply test films to a suitableplane,rigid base material from which the dried film may besatisfactorily removed.The panels shall be of sufficient size topermit film thickness measurements to be made 25 mm(1 in.)from any edge.5.1.1 Coatings should be applied in accordance with Prac-tices D823 or as agreed