ASTM D562-10(2023)

Standard Test Method for Consistency of Paints Measuring Krebs Unit (KU) Viscosity Using a Stormer-Type Viscometer

SIGNIFICANCE AND USE
5.1 This test method provides values that are useful in specifying and controlling the consistency of paints, such as consumer or trade sales products.
SCOPE
1.1 This test method covers the measurement of Krebs Unit (KU) viscosity to evaluate the consistency of paints and related coatings using the Stormer-type viscometer.  
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.  
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: 31-Jan-2023
• ICS: 87.040 - Paints and varnishes
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.24 - Physical Properties of Liquid Paints & 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: D562 − 10 (Reapproved 2023)
Standard Test Method for
Consistency of Paints Measuring Krebs Unit (KU) Viscosity
1
Using a Stormer-Type Viscometer
This standard is issued under the fixed designation D562; 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 3.1.2.1 Discussion—This scale is a function of the “load to
produce 200 r ⁄min” scale.
1.1 This test method covers the measurement of Krebs Unit
(KU) viscosity to evaluate the consistency of paints and related
4. Summary of Test Method
coatings using the Stormer-type viscometer.
4.1 The load required to produce a rotational frequency of
1.2 The values stated in SI units are to be regarded as the
200 r/min for an offset paddle rotor immersed in a paint is
standard. The values given in parentheses are for information
determined.
only.
1.3 This standard does not purport to address all of the
5. Significance and Use
safety concerns, if any, associated with its use. It is the
5.1 This test method provides values that are useful in
responsibility of the user of this standard to establish appro-
specifying and controlling the consistency of paints, such as
priate safety, health, and environmental practices and deter-
consumer or trade sales products.
mine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accor-
METHOD A
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
6. Apparatus
Development of International Standards, Guides and Recom-
6.1 Viscometer, Stormer, with the paddle-type rotor as illus-
mendations issued by the World Trade Organization Technical
trated in Fig. 1 and Fig. 2. The stroboscopic timer attachment
Barriers to Trade (TBT) Committee.
in Fig. 1 can be removed and the instrument used without it but
with a sacrifice of speed and accuracy. The stroboscopic timer
2. Referenced Documents
gives the 200 r/min reading directly.
2
2.1 ASTM Standards:
3
6.2 Container, 500 mL (1 pt), 85 mm (3 ⁄8 in.) in diameter.
E1 Specification for ASTM Liquid-in-Glass Thermometers
6.3 Thermometer—An ASTM Stormer Viscosity thermom-
3. Terminology
eter having a range from 20 °C to 70 °C and conforming to the
requirements for Thermometer 49C, as prescribed in Specifi-
3.1 Definitions of Terms Specific to This Standard:
3.1.1 consistency, n—load in grams to produce a rotational cation E1. In addition, temperature measuring devices such as
frequency of 200 r/min (Stormer Viscometer). non-mercury liquid-in-glass thermometers, thermocouples, or
platinum resistance thermometers that provide equivalent or
3.1.2 Krebs units (KU), n—values of a scale commonly used
better accuracy and precision, that cover the temperature range
to express the consistency of paints generally applied by brush
for thermometer 49C, may be used.
or roller.
6.4 Stopwatch, or suitable timer measuring to 0.2 s.
6.5 Weights, a set covering the range from 5 g to 1000 g.
1
This test method is under the jurisdiction of ASTM Committee D01 on Paint
and Related Coatings, Materials, and Applications and is the direct responsibility of
7. Materials
Subcommittee D01.24 on Physical Properties of Liquid Paints & Paint Materials.
Current edition approved Feb. 1, 2023. Published February 2023. Originally
7.1 Two standard oils, calibrated in absolute viscosity
approved in 1947. Last previous edition approved in 2018 as D562 – 10 (2018).
(poise), that are within the viscosity range of the coatings to be
DOI: 10.1520/D0562-10R23.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
measured. These oils should differ in viscosity by at least 5 P.
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on NOTE 1—The normal range of the Stormer is covered by oils having
the ASTM website. viscosities of 4 P (70 KU), 10 P (85 KU), and 14 P (95 KU).
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D562 − 10 (2023)
7.1.2 Assign a value of load to produce 200 r/min to each oil
by converting its viscosity value in poises to load in grams by
3
the following equation:
L 5 610O1906.6 D /30
~ !
where:
O = viscos
...