ASTM D1200-94(2005)
(Test Method)Standard Test Method for Viscosity by Ford Viscosity Cup
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 D 2196 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.
General Information
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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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D1200 – 94 (Reapproved 2005)
Standard Test Method for
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 3.1.1 Newtonian liquid, n—aliquidinwhichtheviscosityis
independent of the shear stress or shear rate. If the ratio of
1.1 Thistestmethodcoversthedeterminationoftheviscos-
shear stress to shear rate is not constant, the liquid is non-
ity of Newtonian or near-Newtonian paints, varnishes, lac-
Newtonian.
quers, and related liquid materials with the Ford-type efflux
3.1.2 Near-Newtonian liquid, n—a liquid in which the
viscosity cup. If the material is non-Newtonian, that is,
variation of viscosity with shear rate is small and the effect on
shear-thinning or thixotropic, Test Method D2196 should be
viscosity of mechanical disturbances such as stirring is negli-
used.
gible.
1.2 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information
4. Summary of Test Method
only.
4.1 The Ford viscosity cup is filled level full with the liquid
1.3 This standard does not purport to address all of the
under test, and the time for the material to flow through one of
safety concerns, if any, associated with its use. It is the
the standard orifices is measured.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
5. Significance and Use
bility of regulatory limitations prior to use.
5.1 This test method is useful for the determination of
2. Referenced Documents package and application viscosities of a number of paints and
2 other coatings and in the thinning of these materials, but is
2.1 ASTM Standards:
limited to Newtonian or near-Newtonian liquids.
D2196 Test Methods for Rheological Properties of Non-
5.2 There are other types of apparatus for measuring vis-
Newtonian Materials by Rotational (Brookfield type) Vis-
cosity in the laboratory that produce more accurate results.
cometer
E1 Specification for ASTM Liquid-in-Glass Thermometers
6. Apparatus
6.1 Ford Viscosity Cups—Nos. 1, 2, 3, 4, and 5 Ford
3. Terminology
viscosity cups made of corrosion- and solvent-resistant mate-
3.1 Definitions:
rials assembled as complete units (Note 1), and conforming to
the dimensional requirements shown in Fig. 1. The orifice
dimensions are considered as a guide only as the combination
This test method is under the jurisdiction of ASTM Committee D01 on Paint
of cup and orifice dimensions must permit conformance to the
and Related Coatings, Materials, andApplications and is the direct responsibility of
flow formula for each cup as listed in the Appendix.
Subcommittee D01.24 on Physical Properties of Liquid Paints & Paint Materials.
Current edition approved May 15, 2005. Published June 2005. Originally
NOTE 1—If the orifice is removed from the cup for any reason the cup
approved in 1952. Last previous edition approved in 1999 as D1200–94(1999).
should be recalibrated before use as described in the Appendix.
DOI: 10.1520/D1200-94R05.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
6.2 Thermometer—Saybolt Viscosity Thermometer con-
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
formingtotherequirementsforThermometer17C(19to27°C)
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. or 17F (66 to 80°F) as prescribed in Specification E1.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D1200 – 94 (2005)
calibrationcheckdependsupontheamountofuseandthecare
that the individual cup receives. If the cup varies more than
10% from standard, it should not be used.
10. Conditioning
10.1 Bring the material to a temperature a few degrees
below that desired and then agitate vigorously for 10 min on a
reciprocating shaker in a pint can two-thirds full. Allow to
stand undisturbed for 10 min while adjusting further to the
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 temperature. For the highest degree of
precision the room temperature should be between 22 and
28°C (72 and 82°F). Determinations should be made at a
temperature above the dew point of the atmosphere surround-
ing the apparatus.
11.2 Choosethepropercupsothatthetimeofeffluxwillbe
between 20 and 100 s (preferably between 30 and 100 s) for
cup Nos. 3, 4, and 5; between 55 and 100 s for cup No. 1; and
between 40 and 100 s for cup No. 2 (Fig. 2).
11.3 Level the instrument so that a cup may be filled level
full without a meniscus or overflow at one side.
11.4 Determine the time in seconds of efflux as follows:
Close the orifice, for example, by holding a rubber stopper
against it. Fill the cup with the prepared specimen. The
preferredmethodistooverfillthecupandscrapeofftheexcess
with a straightedge. Pull the stopper away and simultaneously
startthetimingdevice.Measurethetimeuntilthefirstbreakin
the stream.
11.5 Measure the temperature of the fluid in the efflux
Orifice A, mm Orifice A, mm stream.
No. 1 1.90 No. 3 3.40
11.6 Ifthecuphasbeenestablishedtobenonstandardwhen
No. 2 2.53 No. 4 4.12
calibrated as described in the Appendix, apply the percent
No. 5 5.20
difference to the measured seconds to get the corrected
FIG. 1 Ford Viscosity Cup and Orifices
viscosity in Ford-cup seconds.
6.3 Timing Device—Any timing device may be used pro-
12. Care of Cup
viding that the readings can be taken with a discrimination of
12.1 Followingeachdetermination,cleanthecupbytheuse
0.2 s or better.
of a suitable solvent and a soft bru
...
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