Standard Specification for Barium Sulfate Pigments

ABSTRACT
This specification covers the barium sulfate pigments commercially known as barytes and blanc fixe. The pigment shall consist of barium sulfate (BaSO4) without any admixture of other materials in the case of blanc fixe, and without any admixture of other materials not naturally occurring in the barite ore in the case of barytes. The pigments shall be subjected to the following tests: coarse particle test, moisture test, barium sulfate test, ferric oxide test, free silica test, hydrogen ion concentration, and matter water solubility test.
SCOPE
1.1 This specification covers the barium sulfate pigments commercially known as barytes and blanc fixe.  
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

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Publication Date
31-Oct-2012
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Technical specification
ASTM D602-81(2012) - Standard Specification for Barium Sulfate 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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:D602 −81(Reapproved 2012)
Standard Specification for
Barium Sulfate Pigments
This standard is issued under the fixed designation D602; 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 In such physical properties as are specified by the
purchaser, the pigment shall satisfactorily match a reference
1.1 This specification covers the barium sulfate pigments
sample mutually agreed upon by the purchaser and the seller.
commercially known as barytes and blanc fixe.
1.2 The values stated in SI units are to be regarded as the
4. Sampling
standard. The values given in parentheses are for information
only.
4.1 Two samples shall be taken at random from different
packages from each lot, batch, day’s pack, or other unit of
2. Referenced Documents
production in a shipment. When no markings distinguishing
2.1 ASTM Standards:
between units of production appear, samples shall be taken
D185 Test Methods for Coarse Particles in Pigments
from different packages in the ratio of two samples of each
D280 Test Methods for Hygroscopic Moisture (and Other
5000 kg (10 000 lb), except that for shipments of less than 10
Matter Volatile Under the Test Conditions) in Pigments
000 lb two samples shall be taken. At the option of the
D715 Test Methods for Analysis of Barium Sulfate Pigment
purchaser, the samples may be tested separately or after
D1208 Test Methods for Common Properties of Certain
blending in equal quantities the samples from the same
Pigments
production unit to form a composite sample.
3. Composition and Properties
3.1 The pigment shall consist of barium sulfate (BaSO ) 5. Test Methods
without any admixture of other materials in the case of blanc
5.1 Tests shall be conducted in accordance with the follow-
fixe,andwithoutanyadmixtureofothermaterialsnotnaturally
ingASTMtestmethods.TestproceduresnotcoveredbyASTM
occurring in the barite ore in the case of barytes, and which
test methods shall be mutually agreed upon by the purchaser
conform to the following requirements:
and the seller.
Blanc
Barytes Fixe
5.2 Coarse Particles in Pigment—Test Methods D185.
Barium sulfate, min, % 94 97
5.3 Moisture—Test Methods D280.
Ferric oxide, max, % 0.05 0.02
pH, min 3.5 3.5
5.4 Barium Sulfate, Ferric Oxide, and Free Silica—Test
Matter soluble
...

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