ASTM D605-82(2019)
(Specification)Standard Specification for Magnesium Silicate Pigment (Talc)
Standard Specification for Magnesium Silicate Pigment (Talc)
ABSTRACT
This specification establishes the properties and requirements for pigments that consist substantially of natural hydrous magnesium silicate (talc), and can be suitably processed to what is commercially known as paint pigment quality. Specimens shall be suitably sampled and tested, and should conform to specified requirements as to combined magnesium and calcium silicates content, calcium oxide content, aluminum and iron oxides content, loss on ignition, moisture and other volatile material, color, coarse particles, water-soluble matter, oil absorption, consistency, and fineness.
SCOPE
1.1 This specification covers pigments that consist substantially of natural hydrous magnesium silicate, and is restricted to those minerals that conform to the chemical limits prescribed herein and can be suitably processed to what is commercially known as paint pigment quality.
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 The following hazard caveat applies to the test method portion of this specification only. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
Relations
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D605 −82 (Reapproved 2019)
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 D1208 Test Methods for Common Properties of Certain
Pigments
1.1 This specification covers pigments that consist substan-
D1210 Test Method for Fineness of Dispersion of Pigment-
tiallyofnaturalhydrousmagnesiumsilicate,andisrestrictedto
Vehicle Systems by Hegman-Type Gage
those minerals that conform to the chemical limits prescribed
herein and can be suitably processed to what is commercially
3. Composition and Properties
known as paint pigment quality.
3.1 The pigment shall be made by grinding or otherwise
1.2 The values stated in SI units are to be regarded as the
processing natural, hydrous magnesium silicate and shall
standard. The values given in parentheses are for information
conform to the following requirements:
only.
Weight %
1.3 The following hazard caveat applies to the test method min max
Combined magnesium and calcium sili- 88 .
portion of this specification only. This standard does not
cates (MgO plus SiO plus CaO)
purport to address all of the safety concerns, if any, associated
Calcium oxide (CaO) . 10
Aluminum and iron oxides (R O ) . 6
with its use. It is the responsibility of the user of this standard
2 3
Loss on ignition . 7
to establish appropriate safety, health, and environmental
Moisture and other volatile material . 1
practices and determine the applicability of regulatory limita-
3.2 Color—The color shall be equal, within agreed upon
tions prior to use.
tolerances, to that of a reference sample agreed upon between
1.4 This international standard was developed in accor-
the purchaser and the seller.
dance with internationally recognized principles on standard-
3.3 Coarse Particles—The pigment shall contain no more
ization established in the Decision on Principles for the
Development of International Standards, Guides and Recom- than 2 % of coarse particles, retained on a 45-µm (No. 325)
sieve except as may be agreed upon between the purchaser and
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee. the seller.
3.4 Water-Soluble Matter—The pigment shall contain no
2. Referenced Documents
more than 1 % water-soluble matter except as may be agreed
2.1 ASTM Standards:
upon between the purchaser and the seller.
D280 Test Methods for Hygroscopic Moisture (and Other
3.5 Oil Absorption—The oil absorption shall be equal,
Matter Volatile Under the Test Conditions) in Pigments
within agreed upon tolerances, to that of a reference sample
D281 Test Method for Oil Absorption of Pigments by
agreed upon between the purchaser and the seller.
Spatula Rub-out
D562 Test Method for Consistency of Paints Measuring 3.6 Consistency—When consistency is included in the pur-
KrebsUnit(KU)ViscosityUsingaStormer-TypeViscom- chaser’s specification, it shall be equal, within agreed upon
eter tolerances, to that of a reference sample agreed upon between
D717 Test Methods for Analysis of Magnesium Silicate the purchaser and the seller.
Pigment
3.7 Fineness—The paint fineness shall be equal, within
agreed upon tolerances, to that of a reference sample agreed
This specification is under the jurisdiction of ASTM Committee D01 on Paint
upon between the purchaser and the seller.
and Related Coatings, Materials, andApplications and is
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