ASTM D4288-02(2019)

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: D4288 −02 (Reapproved 2019)
Standard Specification for
Calcium Borosilicate Pigments
This standard is issued under the fixed designation D4288; 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 3.2 The mass color of the dry pigment is white. The shade
and tinting strength when specified shall be equal to that of a
1.1 This specification covers three grades of pigment com-
reference sample mutually agreed upon between the purchaser
mercially known as calcium borosilicate composite pigment.
and the seller.
The two types differ in chemical composition while the two
3.3 Particle Size:
classes of Type I differ in oil absorption.
3.3.1 All types are characterized by major amounts of
1.2 This international standard was developed in accor-
particles in the 1 to 10-µm range. Coarse particles retained on
dance with internationally recognized principles on standard-
a 45-µm (No. 325) sieve shall be less than 0.3 %. The
ization established in the Decision on Principles for the
maximum specific surface diameter (SSD) shall be 2.5-µm.
Development of International Standards, Guides and Recom-
3.3.2 Where closer control within a class or type is required,
mendations issued by the World Trade Organization Technical
the fineness requirements shall be as agreed upon between the
Barriers to Trade (TBT) Committee.
purchaser and the seller.
2. Referenced Documents
4. Sampling
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
C958 Test Method for Particle Size Distribution ofAlumina
production in a shipment. When no markings distinguishing
or Quartz by X-Ray Monitoring of Gravity Sedimentation
between units of production appear, samples shall be taken
D185 Test Methods for Coarse Particles in Pigments
fromdifferentpackages,intheratiooftwosamplesforeach10
D281 Test Method for Oil Absorption of Pigments by
000 lb (5000 kg), except that for shipments of less than 10 000
Spatula Rub-out
lb two samples shall be taken. At the option of the purchaser,
D1366 PracticeforReportingParticleSizeCharacteristicsof
the samples may be tested separately or after blending in equal
Pigments
quantities the samples from the same production unit to form a
D3360 Test Method for Particle Size Distribution by Hy-
composite sample.
drometer of the Common White Extender Pigments
(Withdrawn 2003)
5. Test Methods
D4487 Test Methods for Analysis of Calcium Borosilicate
5.1 Tests shall be conducted in accordance with the follow-
3. Composition and Properties ingASTMtestmethods.TestproceduresnotcoveredbyASTM
test methods shall be mutually agreed upon between the
3.1 All types of pigment shall consist of a complex com-
purchaser and the seller.
posite of alkaline earth silicates and borates and shall conform
5.2 Chemical Analysis—Test Methods D4487.
to the requirements of Table 1.
5.3 Ignition Loss—Test Methods D4487.
5.4 Particle Size—To be determined by Test Method D3360
1 4
This specification is under the jurisdicti
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