ASTM D1644-01(2023)

Standard Test Methods for Nonvolatile Content of Varnishes

SIGNIFICANCE AND USE
2.1 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.  
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. For a specific statement, see Section 3.  
1.4 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

• Status: Published
• Publication Date: 30-Jun-2023
• ICS: 87.040 - Paints and varnishes
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.21 - Chemical Analysis of Paints and Paint Materials

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: D1644 − 01 (Reapproved 2023)
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 U.S. Department of Defense.
1. Scope the size of the oven, the type of oven (mechanical or gravity
convection) and the air changes per hour.
1.1 These test methods determine the fraction of a varnish
that is nonvolatile at the temperature of the test while volatile
TEST METHOD A—3 h AT 105 °C
solvents are driven off. It is sometimes an approximate
measure of the film-forming matter in a varnish.
4. Procedure
1.2 The values stated in SI units are to be regarded as the
4.1 Place a portion of the thoroughly mixed sample in a
standard. The values given in parentheses are for information
stoppered bottle, or alternatively, in a weighing pipet or a
only.
10 mL syringe without a needle, and from this weigh by
1.3 This standard does not purport to address all of the
difference 1.2 g 6 0.1 g into a tared flat-bottomed metal or
safety concerns, if any, associated with its use. It is the
glass dish (Note 1), 80 mm to 100 mm in diameter and 5 mm
responsibility of the user of this standard to establish appro-
to 10 mm in depth, such as friction-top can covers, ointment
priate safety, health, and environmental practices and deter-
boxes, or petri dishes.
mine the applicability of regulatory limitations prior to
use. For a specific statement, see Section 3.
NOTE 1—The term “tared, flat-bottomed dish” implies that the empty
1.4 This international standard was developed in accor- dish has no measurable weight change when subjected to the same heat
schedule as prescribed for the dish containing the specimen. If this is
dance with internationally recognized principles on standard-
found to be not so, then more suitable vessels must be found, or
ization established in the Decision on Principles for the
corrections applied.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical 4.2 By gentle tilting, spread the specimen over the bottom of
Barriers to Trade (TBT) Committee.
the dish and heat for 3 h in a ventilated oven maintained at
105 °C 6 2 °C. If necessary, a piece of stout wire can be
2. Significance and Use
included in the tare of the dish and used at intervals to break up
skins by stirring during the heating period. Cool in a desiccator
2.1 These test methods are applicable to varnish and are
useful to producers and users in determining nonvolatile and weigh the dish.
content and are sometimes an appropriate measure of the
film-forming matter in varnish.
5. Calculation
5.1 Calculate the percent of nonvolatile matter NV as
3. Hazards
follows (Note 2):
3.1 Since the flash points of some of the solvents used in
NV 5 @~C 2 A!/S# × 100 (1)
coatings and related products are below the temperature of the
test, care should be exercised that the lower explosive limits of
where:
the solvents are not exceeded. The amount of solvent in the
A = weight of dish, g,
oven atmosphere at any one time will depend on the number of
S = weight of specimen used, g, and
tests (pans) in the oven, the percent nonvolatile of the samples,
C = weight
...