ASTM D768-01

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: D 768 – 01
Standard Specification for
1
Yellow Iron Oxide Hydrated
This standard is issued under the fixed designation D 768; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope agents to a semipaste or fluid type consistency. As received, it
shall not be caked in the container and shall break up readily in
1.1 This specification covers the pigment commercially
oil to form a smooth paint of brushing consistency. It shall mix
known as yellow iron oxide, hydrated.
readily in all porportions, without curdling, with linseed oil,
1.2 The values stated in SI units are to be regarded as the
turpentine, or volatile petroleum spirits, or any mixtures of
standard. The values given in parentheses are for information
these substances. The paste shall conform to the following
only.
requirements:
2. Referenced Documents
Pigment, min, % 55
Nonvolatile vehicle, min, % of vehicle 80
2.1 ASTM Standards:
Moisture by distillation, max, % 2.0
D 50 Test Methods for Chemical Analysis of Yellow, Or-
Coarse particles and skins (total residue retained on a 1.0
No. 325 (45-µm) sieve), max, percent of the dry
ange, Red, and Brown Pigments Containing Iron and
pigment
2
Manganese
Consistency by the Stormer viscometer:
A
D 185 Test Methods for Coarse Particles in Pigments,
At shearing rate of 100 revolutions/30 s, min, g 700
B
2
At shearing rate of 100 revolutions/35 s, max, g 1200
Pastes, and Paints
__________
D 280 Test Methods for Hygroscopic Moisture (and Other
A
2
Equivalent to a rating of 125 Krebs’ Units.
Matter Volatile Under the Test Conditions) in Pigments
B
Equivalent to a rating of 145 Krebs’ Units.
D 1208 Test Methods for Common Properties of Certain
3.3 The mass color character of the tint and the tinting
2
Pigments
strength formed by a mixture with a white pigment shall be
within mutually agreed upon limits of a standard acceptable to
3. Composition and Properties
both the purchaser and the seller.
3.1 The pigment shall be a manufactured yellow iron oxide
obtained by chemical reaction. It shall be a soft, finely
4. Sampling
powdered pigment, free of admixtures of other substances and
4.1 Two samples shall be taken at random from different
shall conform to the following requirements:
packages from each lot, batch, day’s pack, or other unit of
Total hydrated oxide of iron, min, % 93
production in a shipment. When no markings distinguishing
A
Total oxide of iron, min, % 83
A
between units of production appear, samples shall be taken
Loss on ignition, max, % 13
Moisture and other volatile matter, max, % 1.0
from different packages in the ratio of two samples for each
Water soluble matter, max, % 0.50
4540 kg or 10 000 lb, except that for shipments of less than
Coarse particles
...