ASTM D716-86(1999)

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: D 716 – 86 (Reapproved 1999)
Standard Test Methods for
Evaluating Mica Pigment
This standard is issued under the fixed designation D 716; 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.
1. Scope mm) in diameter. It may be found necessary to replace the top
glass baffle with one that is longer to ensure that all of the sifted
1.1 These test methods cover the evaluation of mica pig-
mica is caught.
ment.
1.2 The values stated in SI units are to be regarded as the
5. Procedure
standard. The values given in parentheses are for information
5.1 Transfer convenient quantities of the mica pigment to
only.
the funnel of the modified volumeter and brush the pigment
1.3 This standard does not purport to address all of the
through the screen with a camel-hair brush until the receiver is
safety concerns associated with its use. It is the responsibility
slightly more than full. Scrape off the excess and weigh the
of the user of this standard to establish appropriate safety and
pigment. Care must be taken not to jar the apparatus during the
health practices and determine the applicability of regulatory
procedure.
limitations prior to use.
6. Calculation
2. Referenced Documents
6.1 Calculate the apparent density of the mica pigment and
2.1 ASTM Standards:
convert to pounds per cubic foot.
D 185 Test Methods for Coarse Particles in Pigments,
Pastes, and Paints
7. Report
D 280 Test Methods for Hygroscopic Moisture (and Other
2 7.1 Report the mean of three determinations as the apparent
Matter Volatile Under the Test Conditions) in Pigments
density of the mica pigment.
E 11 Specification for Wire-Cloth Sieves for Testing Pur-
poses
8. Reproducibility of Results
8.1 The mean of the three determinations should check
3. Significance and Use
within 5 %.
3.1 These test methods are used to determine apparent
density of mica pigments and the grit level. This information is
MOISTURE AND OTHER VOLATILE MATTER
significant to the user of mica pigments for inclusion in
coatings.
9. Procedure
9.1 Determine the moisture and other volatile matter in
APPARENT DENSITY
accordance with Test Methods D 280.
4. Apparatus
GRIT
4.1 Volumeter —A Scott volumeter or similar apparatus
modified as follows: The screen used shall conform to the 10. Apparatus
requirements of a No. 40 (425-μm) sieve as prescribed in
10.1 Beaker, 600-mL, low-form.
Specification E 11. The funnel below the screen shall be
10.2 Metal Tubing—An L-shape metal tube (Fig. 1) 6.4 mm
replaced by a conical funnel having a bottom opening 1 in. (25
( ⁄4in.) in outside diameter with a foot 25 mm (1 in.) in length.
The foot of the tube shall be drilled to 4.4 mm (0173 in.) (No.
1 1
These test methods are under the jurisdiction of ASTM Committee D-1 on Paint 17 drill) in inside diameter for a depth of 12.7 mm ( ⁄2 in.). The
and Related Coatings, Materials, and Applications and are the direct responsibility
tube shall be placed in the beaker with the long arm in the
of Subcommittee D01.31 on Pigment Specifications.
vertical position, and the foot of the L parallel to the bottom of
Current edition approved Sept. 26, 1986. Published November 1986. Originally
e1
the beaker and perpendicular to the radius of the bottom at a
published as D 716 – 43. Last previous edition D 716 – 75 (1981) .
Annual Book of ASTM Standards, Vol 06.03.
point such that there is about 1.5-mm ( ⁄16-in.) clearance
Annual Book of ASTM Standards, Vol 14.02.
between the tubing and both the bottom and side of the beaker.
The volumeter is no longer generally available. As of June 1986 only one
The
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