ASTM D1640-95(1999)
(Test Method)Standard Test Methods for Drying, Curing, or Film Formation of Organic Coatings at Room Temperature
Standard Test Methods for Drying, Curing, or Film Formation of Organic Coatings at Room Temperature
SCOPE
1.1 These test methods cover the determination of the various stages and rates of film formation in the drying or curing of organic coatings normally used under conditions of ambient room temperature.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 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 and health practices and determine the applicability of regulatory limitations prior to use.
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Designation: D 1640 – 95 (Reapproved 1999)
Standard Test Methods for
Drying, Curing, or Film Formation of Organic Coatings at
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Room Temperature
This standard is issued under the fixed designation D 1640; 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 Department of Defense.
1. Scope 3. Significance and Use
1.1 These test methods cover the determination of the 3.1 These test methods are used to determine the various
various stages and rates of film formation in the drying or stages and rates of drying, curing, and film formation of
curing of organic coatings normally used under conditions of organic coatings for the purpose of comparing types of
ambient room temperature. coatings or ingredient changes, or both. This is significant in
1.2 The values stated in inch-pound units are to be regarded the development of organic coatings for various end uses and
as the standard. The values given in parentheses are for also for production quality control.
information only.
4. Coatings and Recommended Film Thicknesses
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 4.1 Whenever tests are to be performed on coatings not
listed in Table 1, there should be a prior agreement between the
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica- purchaser and seller as to the substrate, film thickness, and
application method for testing the specific coating involved.
bility of regulatory limitations prior to use.
2. Referenced Documents 5. Test Conditions
5.1 Conduct all drying tests in a well-ventilated room or
2.1 ASTM Standards:
D 202 Test Methods of Sampling and Testing Untreated chamber, free from direct drafts (Note 1), dust, products of
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combustion, laboratory fumes and under diffused light (see
Paper Used for Electrical Insulation
5.4). Make all measurements at a temperature of 23 6 2°C and
D 823 Practices for Producing Films of Uniform Thickness
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of Paint, Varnish, and Related Products on Test Panels 50 6 5 % relative humidity with the coated panels in a
horizontal position while drying.
D 1005 Test Methods for Measurement of Dry-Film Thick-
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ness of Organic Coatings Using Micrometers
NOTE 1—A device to equalize air change conditions has been devel-
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D 2091 Test Method for Print Resistance of Lacquers 7
oped by F. Scofield. Relative humidity should be controlled for moisture-
2.2 U.S. Government Standards:
cured and two-package urethane coatings, since their cure is greatly
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Fed. Spec. No. CCC-C-440, Cheesecloth affected by the existing moisture conditions.
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Fed. Spec. No. CCC-C-419b, Type III, Army Duck
5.2 Tests should be carried out at practical viscosities at
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2.3 TAPPI Standards:
which films can be applied to the proper film thickness with
T 402 Standard Conditioning and Testing Atmospheres for
resultant good flow and leveling properties. In the absence of
Paper, Board, Pulp Handsheets, and Related Products
any specific material specification, instructions for preparation
of the film should be determined and agreed upon between the
purchaser and the seller.
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These test methods are under the jurisdiction of ASTM Committee D-1 on Paint
5.3 Films to be tested should have practical thicknesses
and Related Coatings, Materials, and Applications and are the direct responsibility
of Subcommittee D01.23 on Physical Properties of Applied Paint Film. commensurate with performance characteristics expected un-
Current edition approved Feb. 15, 1995. Published April 1995. Originally
der actual usage for the type under test. All testing should be
e1
published as D 1640 – 59 T. Last previous edition D 1640 – 83 (1989) .
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done within an area, any point of which is not less than ⁄2 in.
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Annual Book of ASTM Standards, Vol 10.01.
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(15 mm) from the film edge.
Annual Book of ASTM Standards, Vol 06.01.
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Annual Book of ASTM Standards, Vol 06.02.
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Available from Standardization Documents Order Desk, Bldg. 4 Section D, 700
Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
6 7
Available from Technical Association of the Pulp and Paper Industry, Technol- Gardner and Sward, Paint Testing Manual, ASTM STP 500, ASTM, 13th
ogy Park, P.O. Box 105113, Atlanta, GA 30348. edition, 1972, p. 269.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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