ASTM D5895-01e1
(Test Method)Standard Test Methods for Measuring Times of Drying or Curing During Film Formation of Organic Coatings Using Mechanical Recorders
Standard Test Methods for Measuring Times of Drying or Curing During Film Formation of Organic Coatings Using Mechanical Recorders
SCOPE
1.1 These test methods describe the determination of several stages and the rate of dry-film formation of organic coatings using straight line and circular mechanical drying-time recording devices.
1.2 The values stated in inch-pounds are to be regarded as the standard. The SI values given in parentheses are provided 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 5895 – 01
Standard Test Methods for
Measuring Times of Drying or Curing During Film Formation
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of Organic Coatings Using Mechanical Recorders
This standard is issued under the fixed designation D 5895; 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.
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e NOTE—Research Report was added editorially June 2001.
1. Scope film (see Fig. 1 and Fig. 2).
3.1.2 dry-through time, n—The dry-through condition is
1.1 These test methods describe the determination of several
reached when the film has solidified so completely that a large,
stages and the rate of dry-film formation of organic coatings
twisting force can be applied without distorting the film. In
using straight line and circular mechanical drying-time record-
these test methods, the dry-through time is reached when the
ing devices.
stylus no longer left any visible track on the film (see Fig. 1 and
1.2 The values stated in SI are to be regarded as the
Fig. 2).
standard. The values given in parentheses are provided for
3.1.3 set-to-touch time, n—The set-to-touch condition is
information only.
reached when the film has solidified sufficiently, by solvent
1.3 This standard does not purport to address all of the
evaporation or chemical reaction, or both, that it not longer
safety concerns, if any, associated with its use. It is the
flows nor sticks to a finger that lightly touches it. In these test
responsibility of the user of this standard to establish appro-
methods, the set-to-touch time is reached where a pear-shaped
priate safety and health practices and determine the applica-
depression appears in the film when the film stops flowing over
bility of regulatory limitations prior to use.
the path of the recorder’s stylus and leaves a track in the film
2. Referenced Documents (see Fig. 1 and Fig. 2).
3.1.4 tack-free time, n—The tack-free condition is reached
2.1 ASTM Standards:
when the film surface has dried or cured (see set-to-touch time)
D 823 Practices for Producing Films of Uniform Thickness
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so that the film does not adhere to very light objects placed on
of Paint, Varnish and Related Products on Test Panels
it. In these test methods, the tack-free time is reached where the
D 1005 Test Methods for Measurement of Dry-Film Thick-
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continuous track in the film ceases and the stylus starts to tear
ness of Organic Coatings Using Micrometers
the film or leave a discontinuous cutting of the film (see Fig. 1
D 3924 Specification for Standard Environment for Condi-
and Fig. 2).
tioning and Testing Paint, Varnish, Lacquers, and Related
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Materials
4. Summary of Test Methods
D 3925 Practice for Sampling Liquid Paints and Related
2 4.1 In Test Method A (Straight Line Recorder), the coating
Pigmented Coatings
is applied to glass strips approximately 300 by 25 mm (12 by
3. Terminology 1 in.). The drying time recorder is immediately placed on the
wet film and the stylus lowered onto the wet coating. The stylus
3.1 Descriptions of Terms Specific to This Standard:
moves across the glass strip at a selected constant speed.
3.1.1 dry-hard time, n—The dry-hard condition is reached
4.2 In Test Method B (Circular Recorder), the coating is
when the drying and curing, or both, reactions have proceeded
applied to glass plates approximately 6 in. by 6 in. (150 by 150
sufficiently that the film is not displaced nor is any noticeable
mm). The drying time recorder is immediately placed on the
mark left by pinching the panels between the thumb on the film
wet film and a stylus is moved in a 360° arc at a selected
and forefinger with a relatively strong force. In these test
constant speed.
methods, the dry-hard time is reached where the stylus stops
tearing or cutting the film, but leaves only a visible trace on the
5. Significance and Use
5.1 The drying times of a coating are significant in deter-
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These test methods are under the jurisdiction of ASTM Committee D01 on
mining when a freshly painted room, floor or stair may be put
Paint and Related Coatings, Materials, and Applications, and are the direct
back in use or a coated article handled or packaged. Slow
responsibility of Subcommittee D01.23 on Physical Properties of Applied Paint
Films.
drying may result in dirt pick-up or, on an exterior surface,
Current edition approved Feb. 10, 2001. Published April 2001.Originally
moisture may cause a nonuniform appearance.
published as D 5895–96. Last previous edition D 5895–96.
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5.2 These test methods are used to determine the various
Annual Book of ASTM Standards, Vol 06.01.
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