ASTM D1005-95(2007)
(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
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 m (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 the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: D1005 − 95 (Reapproved2007)
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 Department of Defense.
1. Scope of Paint, Varnish, and Related Products on Test Panels
D2370 Test Method for Tensile Properties of Organic Coat-
1.1 This test method covers the measurement of film thick-
ings
ness of dried films of paint, varnish, lacquer, and related
products using micrometers. Procedures A and B utilize sta-
3. Significance and Use
tionary micrometers and Procedures C and D, hand-held
micrometers. Procedures A and C are not recommended for
3.1 This test method is particularly applicable to the mea-
films less than 12.5 µm (0.5 mils) in thickness. The minimum
surement of free films and is also satisfactory for the measure-
thickness required for Procedures B and D is a function of that
ment of films on laboratory test panels.
required to enable removal of the sample as a free film.
3.2 The accuracy and precision of the thickness measure-
1.2 The procedures appear as follows:
ments may be influenced by the deformability of the coating.
1.2.1 Procedure A—Stationary micrometer for measuring
This test method is not applicable to coatings that are readily
coatings applied to plane rigid surfaces.
deformable under the load of the measuring instrument.
1.2.2 Procedure B—Stationary micrometer for measuring
3.3 The accuracy and precision of the thickness measure-
free films.
ments are also influenced by the uniformity of the substrate
1.2.3 Procedure C—Hand-held micrometer for measuring
when the coatings are applied to laboratory test panels.
coatings applied to plane rigid surfaces.
1.2.4 Procedure D—Hand-held micrometer for measuring
4. Apparatus
free films.
4.1 Procedures A and B:
1.3 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information 4.1.1 The apparatus shall consist of a dial comparator, dial
only. indicator, or micrometer.Arigid base is required for mounting
the dial comparator or dial indicator gages. The presser foot of
1.4 This standard does not purport to address the safety
the micrometer or dial indicator shall be circular, from 1.5 to
concerns, if any, associated with its use. It is the responsibility
1 1
3.0 mm ( ⁄16 to ⁄8 in.) in diameter, and shall be flat on the
of the user of this standard to establish appropriate safety and
bottom.Thepresserfootshallbefixedtoanindicatorthatreads
health practices and determine the applicability of regulatory
to 2.5 µm (0.1 mil). The load on the presser foot shall be
limitations prior to use.
between 140 and 275 kPa (20 and 40 psi ). For Procedure B, a
smooth uncoated test plate is also required.
2. Referenced Documents
2 4.1.2 Verify the accuracy of instrument calibration by set-
2.1 ASTM Standards:
ting to zero with the anvils closed followed by measuring
D823 Practices for Producing Films of Uniform Thickness
shims of known thicknesses or standards specifically designed
for this purpose. Record the standard thickness gage measure-
mentandthemicrometerreading.Usetheseresultstoconstruct
This test method is under the jurisdiction of ASTM Committee D01 on Paint
a calibration curve.
and Related Coatings, Materials, andApplications and is the direct responsibility of
Subcommittee D01.23 on Physical Properties of Applied Paint Films.
4.2 Procedures C and D—The apparatus shall consist of a
Current edition approved Nov. 1, 2007. Published November 2007. Originally
hand-held micrometer. The anvils of the micrometer shall be
approved in 1949. Last previous edition approved in 2001 as D1005 – 95 (2001).
1 1
DOI: 10.1520/D1005-95R07.
circular, from 1.5 to 3.0 mm ( ⁄16 to ⁄8 in.) in diameter, with
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
flat bottoms. Verify the accuracy of instrument calibration by
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
setting to zero with the anvils closed followed by measuring
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. shims of known thicknesses or standards specifically designed
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D1005 − 95 (2007)
for this purpose. Record the standard thickness gage measure-
mentandthemicrometerreading.Usetheseresultstoconstruct
a calibration curve.
5. Test Specimen
5.1 Procedures A and C—Apply test films to a suitable
plane, rigid base material from which the dried film may be
satisfactorily removed. The panels shall be of sufficient size to
permit 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 upon between the purchaser and the
seller.
5.2 Procedures B and D—Free films of the test material are
required. Alternatively, the test materials can be applied to an
appropriate substrate in order that they can be removed as free
films without deformation. If the method of specimen prepa-
ration affects the film forming properties of the test material or FIG. 1 Test Panel Mounted on Base
requires cutting or scraping to remove the free film, use
Procedures A or C instead.
5.2.1 Free films may be prepared in accordance with Test
Method D2370.
6.2.3 Open the gage and lay a free film of the test material
on the panel in the same area where the measurement was
6. Procedure
taken. Close the gage slowly with care not to distort the film
and take a reading, estimating to 2.5 µm (0.1 mil).
6.1 Procedure A:
6.2.4 The difference in the gage readings is the thickness of
6.1.1 Mount the test panel rigidly on a suitable base. Clamp
the film. Record to 2.5 µm (0.1 mil).
or hold it to the base in such a way that there will be no
6.2.5 When conditions permit, perform a minimum of three
movement or spring of the panel during the film thickness
determinations adjacent to one another on each film.
measurement.
6.1.2 Close the gage slowly until contact is made, but
6.3 Procedure C:
without visible distortion of the film. Read the gage, estimating
6.3.1 Hold the hand-held micrometer in such a manner that
to 2.5 µm (0.1 mil), and record the reading.
the micrometer can be steadied against a film surface. Separate
6.1.3 Open the gage and remove the film carefully from the
the micrometer anvils to a distance at least twice that of the
area where the measurement was taken. Any suitable means,
film thickness to be measured.
chemical or mechanical, may be used to remove the film,
6.3.2 Place the coated base material between anvil contacts.
taking care not to distort the panel. Close the gage, slowly on
Be sure to align the panel so that it is perpendicular to th
...
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