ASTM D4288-02(2012)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D4288 −02(Reapproved 2012)
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 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 Where closer control within a class or type is required,
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
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(Withdrawn 2003)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-
ingASTMtestmethods.TestproceduresnotcoveredbyASTM
3. Composition and Properties
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.
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
5.4 Particle Size—To be determined by Test Method D3360
reference sample mutually agreed upon between the purchaser
or equivalent instrumental technique.
and the seller.
5.5 Specific Surface Diameter—Particle Size by Sedimenta-
3.3 Particle Size:
tion Methods section of Practice D1366.
3.3.1 All types are characterized by major amounts of
5.6 Oil Absorption—Test Method D281.
particles in the 1 to 10-µm range. Coarse particles retained on
5.7 Coarse Particles—The Insoluble Dry Pigments section
of Test Methods D185.
...