This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. Designation: D1005 -95 (Reapproved 2024) INTERNATIONAL Standard Test Method for Measurement of Dry-Film Thickness of Organic Coatings Using Micrometers1 This standard is issued under the fixed designation D1005; the number immediately following the designation indicates the year of original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A superscript epsilon (e) indicates an editorial change since the last revision or reapproval. This standard has been approved for use by agencies of the U.S. Department of Defense. 1. Scope 2. Referenced Documents 1.1 This test method covers the measurement of film thick- 2.1 ASTM Standards:2 ness of dried films of paint, varnish, lacquer, and related D823 Practices for Producing Films of Uniform Thickness products using micrometers. Procedures A and B utilize sta- of Paint, Coatings and Related Products on Test Panels tionary micrometers and Procedures C and D, hand-held D2370 Test Method for Tensile Properties of Organic Coat- micrometers. Procedures A and C are not recommended for ings films less than 12.5 μm (0.5 mils) in thickness. The minimum 3. Significance and Use thickness requiredforProcedures B andDis afunctionof that required to enable removal of the sample as a free film. 3.1 This test method is particularly applicable to the mea- surement of free films and is also satisfactory for the measure- 1.2 The procedures appear as follows: ment of films on laboratory test panels. 1.2.1 Procedure A-Stationary micrometer for measuring 3.2 The accuracy and precision of the thickness measure- coatings applied toplanerigid surfaces. 1.2.2 Procedure B-Stationary micrometer for measuring ments may be influenced by the deformability of the coating. This test method is not applicable to coatings that are readily free films. deformable under the load of the measuring instrument. 1.2.3 Procedure C-Hand-held micrometer for measuring 3.3 The accuracy and precision of the thickness measure- coatings applied to plane rigid surfaces. 1.2.4 Procedure D-Hand-held micrometer for measuring mentsarealsoinfluencedbytheuniformityof the substrate free films. when the coatings are applied to laboratory test panels. 1.3 The values stated in SI units are to be regarded as the 4.Apparatus standard. The values given in parentheses are for information 4.1 Procedures A and B: only. 4.1.1 The apparatus shall consist of a dial comparator, dial 1.4 This standard does not purport to address all of the indicator, or micrometer. A rigid base is required for mounting safety concerns, if any, associated with its use. It is the the dial comparator or dial indicator gauges. The presser foot of responsibility of the user of this standard to establish appro- the micrometer or dial indicator shall be circular, from 1.5 mm priate safety, health, and environmental practices and deter- to3.0mm(Vi6in.to/in.)indiameter,and shallbeflatonthe mine the applicability of regulatory limitations prior to use. bottom.Thepresserfootshallbefixedtoanindicatorthatreads 1.5 This international standard was developed in accor- to 2.5 μm (0.1 mil). The load on the presser foot shall be dance with internationally recognized principles on standard- between 140kPa and 275 kPa (20 psi and 40 psi). For ization established in the Decision on Principles for the Procedure B, a smooth uncoated test plate is also required. Development of International Standards, Guides and Recom- 4.1.2Verifytheaccuracyofinstrumentcalibrationbyset- mendations issued by the World Trade Organization Technical ting to zero with the anvils closed followed by measuring Barriers to Trade (TBT)