ASTM D1005-95(2020)
(Test Method)Standard Test Method for Measurement of Dry-Film Thickness of Organic Coatings Using Micrometers
Standard Test Method for Measurement of Dry-Film Thickness of Organic Coatings Using Micrometers
SIGNIFICANCE AND USE
3.1 This test method is particularly applicable to the measurement of free films and is also satisfactory for the measurement of films on laboratory test panels.
3.2 The accuracy and precision of the thickness measurements may be influenced by the deformability of the coating. This test method is not applicable to coatings that are readily deformable under the load of the measuring instrument.
3.3 The accuracy and precision of the thickness measurements are also influenced by the uniformity of the substrate when the coatings are applied to laboratory test panels.
SCOPE
1.1 This test method covers the measurement of film thickness of dried films of paint, varnish, lacquer, and related products using micrometers. Procedures A and B utilize stationary micrometers and Procedures C and D, hand-held micrometers. Procedures A and C are not recommended for films less than 12.5 μm (0.5 mils) in thickness. The minimum thickness required for Procedures B and D is a function of that required to enable removal of the sample as a free film.
1.2 The procedures appear as follows:
1.2.1 Procedure A—Stationary micrometer for measuring coatings applied to plane rigid surfaces.
1.2.2 Procedure B—Stationary micrometer for measuring free films.
1.2.3 Procedure C—Hand-held micrometer for measuring coatings applied to plane rigid surfaces.
1.2.4 Procedure D—Hand-held micrometer for measuring free films.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 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.
General Information
Relations
Standards Content (Sample)
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 2020)
Standard Test Method for
Measurement of Dry-Film Thickness of Organic Coatings
Using Micrometers
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 (´) 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
2.1 ASTM Standards:
1.1 This test method covers the measurement of film thick-
D823 Practices for Producing Films of Uniform Thickness
ness of dried films of paint, varnish, lacquer, and related
of Paint, Coatings and Related Products on Test Panels
products using micrometers. Procedures A and B utilize sta-
D2370 Test Method for Tensile Properties of Organic Coat-
tionary micrometers and Procedures C and D, hand-held
ings
micrometers. Procedures A and C are not recommended for
films less than 12.5 µm (0.5 mils) in thickness. The minimum
3. Significance and Use
thickness required for Procedures B and D is a function of that
3.1 This test method is particularly applicable to the mea-
required to enable removal of the sample as a free film.
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 to plane rigid surfaces.
ments may be influenced by the deformability of the coating.
1.2.2 Procedure B—Stationary micrometer for measuring
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.
ments are also influenced by the uniformity of the substrate
1.2.4 Procedure D—Hand-held micrometer for measuring
when the coatings are applied to laboratory test panels.
free films.
4. Apparatus
1.3 The values stated in SI units are to be regarded as the
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
indicator, or micrometer.Arigid base is required for mounting
1.4 This standard does not purport to address all of the
the dial comparator or dial indicator gages. The presser foot of
safety concerns, if any, associated with its use. It is the
the micrometer or dial indicator shall be circular, from 1.5 to
responsibility of the user of this standard to establish appro-
1 1
3.0 mm ( ⁄16 to ⁄8 in.) in diameter, and shall be flat on the
priate safety, health, and environmental practices and deter-
bottom.Thepresserfootshallbefixedtoanindicatorthatreads
mine the applicability of regulatory limitations prior to use.
to 2.5 µm (0.1 mil). The load on the presser foot shall be
1.5 This international standard was developed in accor-
between 140 and 275 kPa (20 and 40 psi). For Procedure B, a
dance with internationally recognized principles on standard-
smooth uncoated test plate is also required.
ization established in the Decision on Principles for the
4.1.2 Verify the accuracy of instrument calibration by set-
Development of International Standards, Guides and Recom-
ting to zero with the anvils closed followed by measuring
mendations issued by the World Trade Organization Technical
shims of known thicknesses or standards specifically designed
Barriers to Trade (TBT) Committee.
for this purpose. Record the standard thickness gage measure-
mentandthemicrometerreading.Usetheseresultstoconstruct
a calibration curve.
This test method is under the jurisdiction of ASTM Committee D01 on Paint
and Related Coatings, Materials, andApplications and is the direct responsibility of
Subcommittee D01.23 on Physical Properties of Applied Paint Films. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved June 1, 2020. Published June 2020. Originally approved contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
in 1949. Last previous edition approved in 2013 as D1005 – 95 (2013). DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/D1005-95R20. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D1005 − 95 (2020)
4.2 Procedures C and D—The apparatus shall consist of a there will be no movement or spring of the panel during the
hand-held micrometer. The anvils of the micrometer shall be film thickness measurement. Fig. 1 illustrates one satisfactory
1 1
circular, from 1.5 to 3.0 mm ( ⁄16 to ⁄8 in.) in diameter, with way of rigidly mounting the panel for measurement.
flat bottoms. Verify the accuracy of instrument calibration by 6.2.2 Close the gage slowly until contact is made. Read the
setting to zero with the anvils closed followed by measuring
gage, estimating to 2.5 µm (0.1 mil), and record the reading.
shims of known thicknesses or standards specifically designed
6.2.3 Open the gage and lay a free film of the test material
for this purpose. Record the standard thickness gage measure-
on the panel in the same area where the measurement was
mentandthemicrometerreading.Usetheseresultstoconstruct
taken. Close the gage slowly with care not to distort the film
a calibration curve.
and take a reading, estimating to 2.5 µm (0.1 mil).
6.2.4 The difference in the gage readings is the thickness of
5. Test Specimen
the film. Record to 2.5 µm (0.1 mil).
5.1 Procedures A and C—Apply test films to a suitable
6.2.5 When conditions permit, perform a minimum of three
plane, rigid base material from which the dried film may be
determinations adjacent to one another on each film.
satisfactorily removed. The panels shall be of sufficient size to
6.3 Procedure C:
permit film thickness measurements to be made 25 mm (1 in.)
6.3.1 Hold the hand-held micrometer in such a manner that
from any edge.
the micrometer can be steadied against a film surface. Separate
5.1.1 Coatings should be applied in accordance with Prac-
the micrometer anvils to a distance at least twice that of the
tices D823 or as agreed upon between the purchaser and the
film thickness to be measured.
seller.
6.3.2 Place the coated base material between anvil contacts.
5.2 Procedures B and D—Free films of the test material are
Be sure to align the panel so that it is perpendicular to the
required. Alternatively, the test materials can be applied to an
contact points. Carefully bring the micrometer anvil into
appropriate substrate in order that they can be removed as free
contact with the film by releasing the spring tension or rotating
films without deformation. If the method of specimen prepa-
the adjustment barrel. Do not compress the film.
ration affects the film forming properties of the test material or
6.3.3 Record the film thickness to 2.5 µm (0.1 mil). For
requires cutting or scraping to remove the free film, use
sprin
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