ASTM D768-81(1995)e1

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
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e1
Designation: D 768 – 81 (Reapproved 1995)
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
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.
e NOTE—Keywords were added editorially in May 1995.
1. Scope shall not be caked in the container and shall break up readily in
oil to form a smooth paint of brushing consistency. It shall mix
1.1 This specification covers the pigment commercially
readily in all porportions, without curdling, with linseed oil,
known as yellow iron oxide, hydrated.
turpentine, or volatile petroleum spirits, or any mixtures of
2. Referenced Documents these substances. The paste shall conform to the following
requirements:
2.1 ASTM Standards:
Pigment, min, % 55
D 50 Test Methods for Chemical Analysis of Yellow, Or-
Nonvolatile vehicle, min, % of vehicle 80
ange, Red, and Brown Pigments Containing Iron and
Moisture by distillation, max, % 2.0
Manganese
Coarse particles and skins (total residue retained on a 1.0
No. 325 (45-μm) sieve), max, percent of the dry
D 185 Test Methods for Coarse Particles in Pigments,
pigment
Pastes, and Paints
Consistency by the Stormer viscometer:
A
D 280 Test Methods for Hygroscopic Moisture (and Other
At shearing rate of 100 revolutions/30 s, min, g 700
B
At shearing rate of 100 revolutions/35 s, max, g 1200
Matter Volatile Under the Test Conditions) in Pigments
__________
D 1208 Test Methods for Common Properties of Certain
2 A
Pigments Equivalent to a rating of 125 Krebs’ Units.
B
Equivalent to a rating of 145 Krebs’ Units.
3. Composition and Properties 3.3 The mass color character of the tint and the tinting
strength formed by a mixture with a white pigment shall be
3.1 The pigment shall be a manufactured yellow iron oxide
within mutually agreed upon limits of a standard acceptable to
obtained by chemical reaction. It shall be a soft, finely
both the purchaser and the seller.
powdered pigment, free of admixtures of other substances and
shall conform to the following requirements:
4. Sampling
Total hydrated oxide of iron, min, % 93
A
4.1 Two samples shall be taken at random from different
Total oxide of iron, min, % 83
A
Loss on ignition, max, % 13
packages from each lot, batch, day’s pack, or other unit of
Moisture and other volatile matter, max, % 1.0
production in a shipment. When no markings distinguishing
Water soluble matter, max, % 0.50
betwe
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