ASTM D605-82(2012)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation:D605 −82 (Reapproved 2012)
Standard Specification for
Magnesium Silicate Pigment (Talc)
This standard is issued under the fixed designation D605; 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 3. Composition and Properties
1.1 This specification covers pigments that consist substan- 3.1 The pigment shall be made by grinding or otherwise
tiallyofnaturalhydrousmagnesiumsilicate,andisrestrictedto
processing natural, hydrous magnesium silicate and shall
those minerals that conform to the chemical limits prescribed conform to the following requirements:
herein and can be suitably processed to what is commercially
Weight %
min max
known as paint pigment quality.
Combined magnesium and calcium sili- 88 .
cates (MgO plus SiO plus CaO)
1.2 The values stated in SI units are to be regarded as the
Calcium oxide (CaO) . 10
standard. The values given in parentheses are for information
Aluminum and iron oxides (R O ) . 6
2 3
only.
Loss on ignition . 7
Moisture and other volatile material . 1
1.3 The following hazard caveat applies to the test method
3.2 Color—The color shall be equal, within agreed upon
portion of this specification only. This standard does not
tolerances, to that of a reference sample agreed upon between
purport to address all of the safety concerns, if any, associated
the purchaser and the seller.
with its use. It is the responsibility of the user of this standard
to establish appropriate safety and health practices and
3.3 Coarse Particles—The pigment shall contain no more
determine the applicability of regulatory limitations prior to
than 2 % of coarse particles, retained on a 45-µm (No. 325)
use.
sieve except as may be agreed upon between the purchaser and
the seller.
2. Referenced Documents
3.4 Water-Soluble Matter—The pigment shall contain no
2.1 ASTM Standards:
more than 1 % water-soluble matter except as may be agreed
D280 Test Methods for Hygroscopic Moisture (and Other
upon between the purchaser and the seller.
Matter Volatile Under the Test Conditions) in Pigments
3.5 Oil Absorption—The oil absorption shall be equal,
D281 Test Method for Oil Absorption of Pigments by
within agreed upon tolerances, to that of a reference sample
Spatula Rub-out
agreed upon between the purchaser and the seller.
D562 Test Method for Consistency of Paints Measuring
KrebsUnit(KU)ViscosityUsingaStormer-TypeViscom-
3.6 Consistency—When consistency is included in the pur-
eter
chaser’s specification, it shall be equal, within agreed upon
D717 Test Methods for Analysis of Magnesium Silicate
tolerances, to that of a reference sample agreed upon between
Pigment
the purchaser and the seller.
D1208 Test Methods for Common Properties of Certain
3.7 Fineness—The paint fineness shall be equal, within
Pigments
agreed upon tolerances, to that of a reference sample agreed
D1210 Test Method for Fineness of Dispersion of Pigment-
upon between the purchaser and the seller.
Vehicle Systems by Hegman-Type Gage
4. Sampling
This specification is under the jurisdiction of ASTM Committee D01 on Paint
4.1 Two samples shall be taken at random from different
and Related Coatings, Materials, andApplications and is the direct responsibility of
packages from each lot, batch, day’s pack, or other unit of
Subcommittee D01.31 on Pigment Specifications.
production in
...