Standard Test Method for Viscosity by Ford Viscosity Cup

SIGNIFICANCE AND USE
This test method is useful for the determination of package and application viscosities of a number of paints and other coatings and in the thinning of these materials, but is limited to Newtonian or near-Newtonian liquids.
There are other types of apparatus for measuring viscosity in the laboratory that produce more accurate results.
SCOPE
1.1 This test method covers the determination of the viscosity of Newtonian or near-Newtonian paints, varnishes, lacquers, and related liquid materials with the Ford-type efflux viscosity cup. If the material is non-Newtonian, that is, shear-thinning or thixotropic, Test Method D2196 should be used.
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 and health practices and determine the applicability of regulatory limitations prior to use.

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Publication Date
30-Jun-2010
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ASTM D1200-10 - Standard Test Method for Viscosity by Ford Viscosity Cup
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D1200 −10
StandardTest Method for
1
Viscosity by Ford Viscosity Cup
This standard is issued under the fixed designation D1200; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber 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 4. Summary of Test Method
1.1 Thistestmethodcoversthedeterminationoftheviscos- 4.1 The Ford viscosity cup is filled level full with the liquid
ity of Newtonian or near-Newtonian paints, varnishes, under test, and the time for the material to flow through one of
lacquers, and related liquid materials with the Ford-type efflux the standard orifices is measured.
viscosity cup. If the material is non-Newtonian, that is,
5. Significance and Use
shear-thinning or thixotropic, Test Method D2196 should be
5.1 This test method is useful for the determination of
used.
package and application viscosities of a number of paints and
1.2 The values stated in SI units are to be regarded as the
other coatings and in the thinning of these materials, but is
standard. The values given in parentheses are for information
limited to Newtonian or near-Newtonian liquids.
only.
5.2 There are other types of apparatus for measuring vis-
1.3 This standard does not purport to address all of the
cosity in the laboratory that produce more accurate results.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
6. Apparatus
priate safety and health practices and determine the applica-
6.1 Ford Viscosity Cups—Nos. 1, 2, 3, 4, and 5 Ford
bility of regulatory limitations prior to use.
viscosity cups made of corrosion- and solvent-resistant mate-
2. Referenced Documents rials assembled as complete units (Note 1), and conforming to
2 the dimensional requirements shown in Fig. 1. The orifice
2.1 ASTM Standards:
dimensions are considered as a guide only as the combination
D2196Test Methods for Rheological Properties of Non-
of cup and orifice dimensions must permit conformance to the
Newtonian Materials by Rotational (Brookfield type)
flow formula for each cup as listed in the Appendix.
Viscometer
E1Specification for ASTM Liquid-in-Glass Thermometers NOTE 1—If the orifice is removed from the cup for any reason the cup
should be recalibrated before use as described in the Appendix.
3. Terminology
6.2 Thermometer—Saybolt Viscosity Thermometer con-
3.1 Definitions:
formingtotherequirementsforThermometer17C(19to27°C)
3.1.1 Newtonian liquid, n—aliquidinwhichtheviscosityis
or 17F (66 to 80°F) as prescribed in Specification E1.In
independent of the shear stress or shear rate. If the ratio of
addition, temperature measuring devices such as non-mercury
shear stress to shear rate is not constant, the liquid is non-
liquid-in-glass thermometers, thermocouples, or platinum re-
Newtonian.
sistance thermometers that provide equivalent or better accu-
3.1.2 Near-Newtonian liquid, n—a liquid in which the racy and precision, that cover the temperature range for
variation of viscosity with shear rate is small and the effect on thermometer 17C and 17F, may be used.
viscosity of mechanical disturbances such as stirring is negli-
6.3 Timing Device—Any timing device may be used pro-
gible.
viding that the readings can be taken with a discrimination of
0.2 s or better.
1
This test method is under the jurisdiction of ASTM Committee D01 on Paint
and Related Coatings, Materials, andApplications and is the direct responsibility of
7. Test Specimen
Subcommittee D01.24 on Physical Properties of Liquid Paints & Paint Materials.
7.1 Thespecimenofthematerialtobetestedshallbevisibly
CurrenteditionapprovedJuly1,2010.PublishedJuly2010.Originallyapproved
in 1952. Last previous edition approved in 2005 as D1200–94(2005). DOI:
homogeneous and free of any foreign material or air bubbles.
10.1520/D1200-10.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 8. Temperature of Testing
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
8.1 All measurements with the Ford viscosity cups shall be
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. made at 25°C (77°F) or a temperature agreed upon between
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D1200−10
desired temperature. Make the viscosity determination at the
end of the 10-min period.
11. Procedure
11.1 Make viscosity determinations in a room free of drafts
and rapid changes in temp
...

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