ASTM D1644-01(2006)
(Test Method)Standard Test Methods for Nonvolatile Content of Varnishes
Standard Test Methods for Nonvolatile Content of Varnishes
SIGNIFICANCE AND USE
These test methods are applicable to varnish and are useful to producers and users in determining nonvolatile content and are sometimes an appropriate measure of the film-forming matter in varnish.
SCOPE
1.1 These test methods determine the fraction of a varnish that is nonvolatile at the temperature of the test while volatile solvents are driven off. It is sometimes an approximate measure of the film-forming matter in a varnish.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
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. For a specific statement, see Section .
General Information
Relations
Standards Content (Sample)
Designation: D1644 − 01 (Reapproved 2006)
Standard Test Methods for
Nonvolatile Content of Varnishes
This standard is issued under the fixed designation D1644; 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 10-mL syringe without a needle, and from this weigh by
difference 1.2 6 0.1 g into a tared flat-bottomed metal or glass
1.1 These test methods determine the fraction of a varnish
dish (Note 1), 80 to 100 mm in diameter and 5 to 10 mm in
that is nonvolatile at the temperature of the test while volatile
depth, such as friction-top can covers, ointment boxes, or petri
solvents are driven off. It is sometimes an approximate
dishes.
measure of the film-forming matter in a varnish.
NOTE 1—The term “tared, flat-bottomed dish” implies that the empty
1.2 The values stated in SI units are to be regarded as the
dish has no measurable weight change when subjected to the same heat
standard. The values given in parentheses are for information
schedule as prescribed for the dish containing the specimen. If this is
only.
found to be not so, then more suitable vessels must be found, or
corrections applied.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4.2 Bygentletilting,spreadthespecimenoverthebottomof
responsibility of the user of this standard to establish appro- the dish and heat for3hina ventilated oven maintained at 105
priate safety and health practices and determine the applica-
62°C.Ifnecessary,apieceofstoutwirecanbeincludedinthe
bility of regulatory limitations prior to use. For a specific tare of the dish and used at intervals to break up skins by
statement, see Section 3.
stirring during the heating period. Cool in a desiccator and
weigh the dish.
2. Significance and Use
2.1 These test methods are applicable to varnish and are
5. Calculation
useful to producers and users in determining nonvolatile
5.1 Calculate the percent of nonvolatile matter NV as
content and are sometimes an appropriate measure of the
follows (Note 2):
film-forming matter in varnish.
NV 5 C 2 A /S 3100 (1)
@~ ! #
3. Hazards
3.1 Since the flash points of some of the solvents used in
where:
coatings and related products are below the temperature of the
A = weight of dish, g,
test, care should be exercised that the lower explosive limits of
S = weight of specimen used, g, and
the solvents are not exceeded. The amount of solvent in the
C = weight of dish and contents after heating, g.
oven atmosphere at any one time will depend on the number of
NOTE 2—Determinations of nonvolatile matter by this test method may
tests (pans) in the oven, the percent nonvolatile of the samples, give high results due either to incomplete elimination of volatile matter or
to absorption of oxygen by oxidizing-type varnishes.
the size of the oven, the type of oven (mechanical or gravity
convection) and the air changes per hour.
6. Report
TEST METHOD A—3 h AT 105°C
6.1 Report the nonvolatile matter of the sample to the
nearest 0.1 %.
4. Procedure
4.1 Place a portion of the thoroughly mixed sample in a
TEST METHOD B—10 min at 150°C
stopper
...
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