ASTM D869-85(1998)
(Test Method)Standard Test Method for Evaluating Degree of Settling of Paint
Standard Test Method for Evaluating Degree of Settling of Paint
SCOPE
1.1 This test method covers the determination of the degree of pigment suspension and ease of remixing a shelf-aged sample of paint to a homogeneous condition suitable for the intended use.
1.2 This standard does not purport to address all of the safety problems, 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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Designation: D 869 – 85 (Reapproved 1998)
Standard Test Method for
Evaluating Degree of Settling of Paint
This standard is issued under the fixed designation D 869; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope width, shall be used to examine the paint for pigment settling
and reincorporation characteristics.
1.1 This test method covers the determination of the degree
of pigment suspension and ease of remixing a shelf-aged
5. Procedure
sample of paint to a homogeneous condition suitable for the
5.1 Place the specimen to be tested for pigment suspension
intended use.
in a 1-pt (500-mL) container, filling the can to within ⁄2 in. (13
1.2 The values stated in inch-pound units are to be regarded
mm) of the top. Close the can tightly and hold undisturbed for
as the standard. The values given in parentheses are for
shelf aging for 6 months or for such other periods of time
information only.
agreed upon between the purchaser and the seller.
1.3 This standard does not purport to address all of the
5.2 Open the can holding the shelf-aged sample without
safety concerns, if any, associated with its use. It is the
shaking or agitation, and examine the sample without removal
responsibility of the user of this standard to establish appro-
of supernatant vehicle. Use the spatula to determine the extent
priate safety and health practices and determine the applica-
and character of portions of the paint that may have separated
bility of regulatory limitations prior to use.
during storage. Prepare a suitable spatula for this purpose by
2. Referenced Documents cutting the tip from an ordinary 5-in. (127-mm) flexible steel
laboratory spatula to the specified length. Hold the spatula
2.1 ASTM Standards:
perpendicular to and in the center area of the paint at a height
D 1309 Test Method for Settling Properties of Traffic Paints
whereby the bottom edge of the spatula is level with the top of
During Accelerated Storage
the can. Drop the spatula from that position. Rate the condition
3. Significance and Use
of the sample in accordance with 5.4.
5.3 After examination of the entire specimen as described in
3.1 Paints, if not formulated or processed properly may
5.2, if a portion of the pigment has separated out to form a firm
settle excessively. Paint that settles excessively is difficult to
cake at the bottom of the container pour the supernatant portion
reincorporate into the paint system causing time delays or
of the liquid off into a clean container and hold for subsequent
valuable pigment being left in the drum. This test method is an
use. Reincorporate the separate cake by hand stirring with the
attempt to evaluate the degree of settling caused by the
spatula, adding back the liquid in small amounts until the
accelerated Test Method D 1309. This very subjective method
pigment has been reincorporated to form a homogeneous paint
of evaluation in conjunction with the variables of Test Method
suitable for the intended use or until it is determined that the
D 1309 raises questions as to the usefulness of the results for
pigment cake cannot be reincorporated by hand stirring. Rate
specification compliance.
the condition of the specimen in accordance with 5.4.
4. Apparatus
5.4 Rate the sample for deg
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