Standard Test Method for Viscosity by Dip-Type Viscosity Cups

SIGNIFICANCE AND USE
Viscosity is a measure of the fluidity of a material. Viscosity data are useful in the determination of the ease of stirring, pumping, dip coating, or other flow-related properties of paints and related fluids.
This type of cup is used to measure viscosity because it is easy to use, robust, and may be used in tanks, reservoirs, and reactors.
There are other types of apparatus for measuring viscosity in the laboratory that provide better precision and bias, including the Ford viscosity cup (Test Method D 1200), and the Brookfield viscometer (Test Methods D 2196).
Certain higher shear rate devices such as cone/plate viscometers (Test Method D 4287) provide more information about sprayability, roll coatability, and other high-shear rate related properties of coatings.
SCOPE
1.1 This test method covers the determination of viscosity of paints, varnishes, lacquers, inks, and related liquid materials by dip-type viscosity cups. This test method is recommended for viscosity control work within one plant or laboratory and should be used to check compliance with specifications only when sufficient controls have been instituted to ensure adequate comparability of results.
1.2 Viscosity cups are designed for testing of Newtonian and near-Newtonian liquids. If the test material is non-Newtonian, for example, shear-thinning or thixotropic, another method, such as Test Methods D 2196, should be used. Under controlled conditions, comparisons of the viscosity of non-newtonian materials may be helpful, but viscosity determination methods using controlled shear rate or shear stress are preferred.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 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
14-May-2005
Current Stage
Ref Project

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ASTM D4212-99(2005) - Standard Test Method for Viscosity by Dip-Type Viscosity Cups
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D4212–99(Reapproved2005)
Standard Test Method for
1
Viscosity by Dip-Type Viscosity Cups
This standard is issued under the fixed designation D4212; 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.
1. Scope E1 Specification for ASTM Liquid-in-Glass Thermometers
1.1 This test method covers the determination of viscosity
3. Terminology
of paints, varnishes, lacquers, inks, and related liquid materials
3.1 Definitions:
by dip-type viscosity cups. This test method is recommended
3.1.1 near-Newtonian liquid, n—a liquid in which the
for viscosity control work within one plant or laboratory and
variation of viscosity with shear rate is small and the effect on
should be used to check compliance with specifications only
viscosity of mechanical disturbances such as stirring is negli-
when sufficient controls have been instituted to ensure ad-
gible.
equate comparability of results.
3.1.2 Newtonian liquid, n—aliquidinwhichtheviscosityis
1.2 Viscosity cups are designed for testing of Newtonian
independent of the shear stress or shear rate. If the ratio of
and near-Newtonian liquids. If the test material is non-
shear stress to shear rate is not constant, the liquid is non-
Newtonian, for example, shear-thinning or thixotropic, another
Newtonian.
method, such as Test Methods D2196, should be used. Under
controlled conditions, comparisons of the viscosity of non-
4. Summary of Test Method
newtonian materials may be helpful, but viscosity determina-
4.1 The cup is completely immersed in the material to be
tion methods using controlled shear rate or shear stress are
tested,withdrawn,andthetimeforthematerialtoflowthrough
preferred.
a hole in the base of the cup is measured.
1.3 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information
5. Significance and Use
only.
5.1 Viscosity is a measure of the fluidity of a material.
1.4 This standard does not purport to address all of the
Viscosity data are useful in the determination of the ease of
safety concerns, if any, associated with its use. It is the
stirring, pumping, dip coating, or other flow-related properties
responsibility of the user of this standard to establish appro-
of paints and related fluids.
priate safety and health practices and determine the applica-
5.2 This type of cup is used to measure viscosity because it
bility of regulatory limitations prior to use.
is easy to use, robust, and may be used in tanks, reservoirs, and
reactors.
2. Referenced Documents
2 5.3 There are other types of apparatus for measuring vis-
2.1 ASTM Standards:
cosity in the laboratory that provide better precision and bias,
D1200 Test Method for Viscosity by Ford Viscosity Cup
including the Ford viscosity cup (Test Method D1200), and the
D2196 Test Methods for Rheological Properties of Non-
Brookfield viscometer (Test Methods D2196).
Newtonian Materials by Rotational (Brookfield type) Vis-
5.4 Certain higher shear rate devices such as cone/plate
cometer
viscometers (Test Method D4287) provide more information
D4287 Test Method for High-Shear Viscosity Using a
about sprayability, roll coatability, and other high-shear rate
Cone/Plate Viscometer
related properties of coatings.
1
6. Apparatus
This test method is under the jurisdiction of ASTM Committee D01 on Paint
and Related Coatings, Materials, andApplications and is the direct responsibility of
6.1 Zahn Viscosity Cup—No. 1 through No. 5 Zahn viscos-
Subcommittee D01.24 on Physical Properties of Liquid Paints and Paint Materials.
ity cups made of corrosion- and solvent-resistant materials.
Current edition approved May 15, 2005. Published June 2005. Originally
The nominal capacity of the cup is 44 mL, but may vary from
approved in 1982. Last previous edition approved in 1999 as D4212 – 99. DOI:
10.1520/D4212-99R05.
43 to 49 mL, depending on the manufacturer. A diagram of a
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
ZahncupisgiveninFig.1.Thedimensions,includingorifices,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
are only approximate because the cups are not made to a
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. uniform specification. Each manufacturer produces a different
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

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D4212–99 (2005)
NOTE 1—Dimensions are approximate only and may vary with the manufacturer and from batch to batch
FIG.
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