Standard Specification for Calcium Borosilicate Pigments

SCOPE
1.1 This specification covers three grades of pigment commercially known as calcium borosilicate composite pigment. The two types differ in chemical composition while the two classes of Type I differ in oil absorption.

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ASTM D4288-02 - Standard Specification for Calcium Borosilicate Pigments
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation: D 4288 – 02
Standard Specification for
1
Calcium Borosilicate Pigments
This standard is issued under the fixed designation D 4288; 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 a 45-µm (No. 325) sieve shall be less than 0.3 %. The
maximum specific surface diameter (SSD) shall be 2.5-µm.
1.1 This specification covers three grades of pigment com-
3.3.2 Whereclosercontrolwithinaclassortypeisrequired,
mercially known as calcium borosilicate composite pigment.
the fineness requirements shall be as agreed upon between the
The two types differ in chemical composition while the two
purchaser and the seller.
classes of Type I differ in oil absorption.
4. Sampling
2. Referenced Documents
4.1 Two samples shall be taken at random from different
2.1 ASTM Standards:
packages from each lot, batch, day’s pack, or other unit of
C 958 Test Method for Particle Size Distribution of Alu-
production in a shipment. When no markings distinguishing
mina or Quartz by X-Ray Monitoring of Gravity Sedimen-
2 between units of production appear, samples shall be taken
tation
from different packages, in the ratio of two samples for each
D 185 Test Methods for Coarse Particles in Pigments,
3
10,000 lb (5,000 kg), except that for shipments of less than
Pastes, and Paints
10,000 lb two samples shall be taken. At the option of the
D 281 Test Method for Oil Absorption of Pigments by
4
purchaser, the samples may be tested separately or after
Spatula Rub-Out
blending in equal quantities the samples from the same
D 1366 Practice for Reporting Particle Size Characteristics
3
production unit to form a composite sample.
of Pigments
D 3360 Test Method for Particle Size Distribution by Hy-
5. Test Methods
3
drometer of the Common White Extender Pigments
3 5.1 Tests shall be conducted in accordance with the follow-
D 4487 Test Methods forAnalysis of Calcium Borosilicate
ingASTMtestmethods.TestproceduresnotcoveredbyASTM
3. Composition and Properties test methods shall be mutually agreed upon between the
purchaser and the seller.
3.1 All types of pigment shall consist of a complex com-
5.2 Chemical Analysis—Test Methods D 4487.
posite of alkaline earth silicates and borates and shall conform
5.3 Ignition Loss—Test Methods D 4487.
to the requirements of Table 1.
5.4 Particle Size—To be determined by Test Method
3.2 The mass color of the dry pigment is white. The shade
5
D 3360 or equivalent instrumental technique.
and tinting strength when specified shall be equal to that of a
5.5 Specific Surface Diameter—Particle Size by Sedimen-
reference sample mutually agreed upon between the purchaser
tation Methods section of Practice D 1366.
and the seller.
5.6 Oil Absorption—Test Method D 281.
3.3 Particle Size:
5.7 Coars
...

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