ASTM D5965-02

Standard Test Methods for Specific Gravity of Coating Powders

SIGNIFICANCE AND USE
Test Method A is a less expensive method of determining specific gravity of coating powders, excluding metallics, that produced less precise results than Test Method B.
Test Method B provides better precision at higher cost and includes metallics, although different models produced different grand averages for each of the three samples tested.
Test Method C is commonly used by the powder coating industry to estimate the coverage of a powder coating at a given thickness, using the theoretical specific gravity calculated from those of the raw materials.
SCOPE
1.1 These test methods cover three procedures for determining the specific gravity (see definition) of coating powders, as follows: TEST METHOD A—For Testing Coating Powders, Excluding MetallicsTEST METHOD B—For Tests Requiring Greater Precision than Test Method A, Including Metallics, Using Helium PycnometryTEST METHOD C—For Theoretical Calculation Based on Raw Material Specific Gravities
1.2 Test Method A can be used as a less expensive method with reduced accuracy for determining the specific gravity of coating powders, excluding metallics.
1.3 The ideal gas law forms the basis for all calculations used in the Test Method B determination of density of coating powders.
1.4 Test Method B includes procedures that provided acceptable results for samples analyzed during round robin testing.
1.5 Test Method B uses SI units as standard. State all numerical values in terms of SI units unless specific instrumentation software reports surface area using alternate units. Many instruments report density as g/cm3, instead of using SI units (kg/m3).
1.6 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.

General Information

• Status: Historical
• Publication Date: 09-Jan-2002
• ICS: 87.040 - Paints and varnishes
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.51 - Powder Coatings

Relations

• Replaces: ASTM D5965-96 - Standard Test Methods for Specific Gravity of Coating Powders
• Effective Date: 10-Jan-2002
• Replaced By: ASTM D5965-02(2007) - Standard Test Methods for Specific Gravity of Coating Powders
• Effective Date: 01-Nov-2007
• Referred By: ASTM B1000-21 - Standard Practices for Casting Preparation and Test Procedure of Porcelain Enamel-lined Pipe, Fittings, and Valves for Use in the Municipal Wastewater, Sewage, and Water Treatment Industry
• Effective Date: 10-Jan-2002
• Referred By: ASTM D4242-07(2017) - Standard Test Method for Inclined Plate Flow for Thermosetting Coating Powders
• Effective Date: 10-Jan-2002
• Referred By: ASTM D3451-06(2017) - Standard Guide for Testing Coating Powders and Powder Coatings
• Effective Date: 10-Jan-2002

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D 5965 – 02
Standard Test Methods for
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Specific Gravity of Coating Powders
This standard is issued under the fixed designation D 5965; 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.
1. Scope * E 691 Practice for Conducting an Interlaboratory Study to
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Determine the Precision of a Test Method
1.1 These test methods cover three procedures for determin-
ing the specific gravity (see definition) of coating powders, as
3. Terminology
follows:
3.1 Definitions:
TEST METHOD A—For Testing Coating Powders, Excluding Metallics
3.1.1 Definitions 3.1.1 and 3.1.3 are from Guide D 5382.
TEST METHOD B—For Tests Requiring Greater Precision than Test Method A,
Including Metallics, Using Helium Pycnometry
3.1.2 coating powders—finely divided particles of resin,
TEST METHOD C—For Theoretical Calculation Based on Raw Material Specific
either thermoplastic or thermosetting, generally incorporating
Gravities
pigments, fillers, and additives and remaining finely divided
1.2 Test Method A can be used as a less expensive method
during storage under suitable conditions, which, after fusing
with reduced accuracy for determining the specific gravity of
and possibly curing, give a continuous film.
coating powders, excluding metallics.
3.1.3 meniscus—curved upper surface of a liquid column
1.3 The ideal gas law forms the basis for all calculations
that is concave when the containing walls are wetted by the
used in the Test Method B determination of density of coating
liquid.
powders.
3.1.4 powder coatings—coatings which are protective or
1.4 Test Method B includes procedures that provided ac-
decorative, or both, formed by the application of a coating
ceptable results for samples analyzed during round robin
powder to a substrate and fused into continuous films by the
testing.
application of heat or radiant energy.
1.5 Test Method B uses SI units as standard. State all
3.1.5 pycnometer—instrument designed to measure the vol-
numerical values in terms of SI units unless specific instru-
ume of solid materials using Archimedes’ principle of fluid
mentation software reports surface area using alternate units.
displacement. The displaced fluid is a helium gas.
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Many instruments report density as g/cm , instead of using SI
3.1.6 specific gravity—(1) strict definition: the density of a
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units (kg/m ).
substance relative to that of water. (2) practical, as used in this
1.6 This standard does not purport to address all of the
test method—The numerical value of the density when the
safety concerns, if any, associated with its use. It is the
latter is expressed in grams per millilitre.
responsibility of the user of this standard to establish appro-
4. Significance and Use
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
4.1 Test Method A is a less expensive method of determin-
ing specific gravity of coating powders, excluding metallics,
2. Referenced Documents
that produced less precise results than Test Method B.
2.1 ASTM Standards:
4.2 Test Method B provides better precision at higher cost
D 3924 Specification for Standard Environment for Condi-
and includes metallics, although different models produced
tioning and Testing Paint, Varnishes, Lacquers, and Re-
different grand averages for each of the three samples tested.
2
lated Materials
4.3 Test Method C is commonly used by the powder coating
D 5382 Guide to Evaluation of Optical Properties of Pow-
industry to estimate the coverage of a powder coating at a
3
der Coatings
given thickness, using the theoretical specific gravity calcu-
lated from those of the raw materials.
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These test methods are under the jurisdiction of ASTM Committee D01 on
5. Reagents
Paint and Related Coatings, Materials, and Applications and are the direct
responsibility of Subcommittee D01.51 on Powder Coatings. 5.1 Purity—Wetting vehicles should be of reagent grades.
Current edition approved Jan. 10, 2002. Published March 2002. Originally
published as D 5965 - 96. Last previous edition D 5965 - 96.
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Annual Book of ASTM Standards, Vol 06.01.
3 4
Annual Book of ASTM Standards, Vol 06.02. Annual Book of ASTM Standards, Vol 14.02.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D 5965
5.2 Helium—Shall be understood to mean high purity of powder with a polished round-bottom glass rod until com-
commercial grade. pletely covered by the wetting vehicle. Wash the rod wit
...