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ASTM

ASTM D3721-05

(Specification)

Standard Specification for Synthetic Red Iron Oxide Pigment

Standard Specification for Synthetic Red Iron Oxide Pigment

ABSTRACT
This specification covers synthetic red iron oxide pigment for use in paints and coatings manufactured by any of the following: calcination of iron salts, precipitation from iron salts, calcination of synthetic iron oxide, and product of organic reduction. The pigment shall conform to the requirements prescribed for the following: total iron oxide content, sulfur content, moisture and other volatile matter content, organic coloring matter content, coarse particles in dry pigments (total residue retained), matter soluble in water, and pH value. If the pigments are available in a range of colors, the mass color and the tinting strength or character of the tint formed by mixture with a white pigment shall be within the specified limits. The sampling and test methods to determine conformance of the pigments to the specified properties are given.
SCOPE
1.1 This specification covers synthetic red iron oxide for use in paints and coatings manufactured by any of the following:
1.1.1 Calcination of iron salts.
1.1.2 Precipitation from iron salts.
1.1.3 Calcination of synthetic iron oxide.
1.1.4 Product of organic reduction.

General Information

Status
Historical
Publication Date
31-Aug-2005
ICS
87.060.10 - Pigments and extenders
Technical Committee
D01 - Paint and Related Coatings, Materials, and Applications
Drafting Committee
D01.31 - Pigment Specifications
Current Stage
Ref Project

Relations

Replaces
ASTM D3721-83(1999) - Standard Specification for Synthetic Red Iron Oxide Pigment
Effective Date
01-Sep-2005
Replaced By
ASTM D3721-05(2011) - Standard Specification for Synthetic Red Iron Oxide Pigment
Effective Date
01-Jun-2011

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ASTM D3721-05 - Standard Specification for Synthetic Red Iron Oxide PigmentASTM D3721-05 - Standard Specification for Synthetic Red Iron Oxide Pigment
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ASTM D3721-05 - Standard Specification for Synthetic Red Iron Oxide Pigment
English language
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: D3721 – 05
Standard Specification for
1
Synthetic Red Iron Oxide Pigment
This standard is issued under the fixed designation D3721; 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
Matter soluble in water, max, % 0.2
pH value, min 5.0
1.1 Thisspecificationcoverssyntheticredironoxideforuse
3.2 Inasmuchasironoxidepigmentsareavailableinarange
in paints and coatings manufactured by any of the following:
1.1.1 Calcination of iron salts. of colors, the mass color and, if desired by the purchaser, the
character of the tint formed by mixture with a white pigment
1.1.2 Precipitation from iron salts.
1.1.3 Calcination of synthetic iron oxide. shall be within mutually agreed upon limits of a reference
sample mutually agreed upon between the seller and the
1.1.4 Product of organic reduction.
purchaser. This sample should be tested in accordance with
2. Referenced Documents
Test Method D387.
2
2.1 ASTM Standards:
4. Sampling
D50 Test Methods for Chemical Analysis of Yellow, Or-
4.1 Two samples shall be taken at random from different
ange, Red, and Brown Pigments Containing Iron and
Manganese packages from each lot, batch, day’s pack, or other unit of
production in a shipment. When no markings distinguishing
D185 Test Methods for Coarse Particles in Pigments
between units of production appear samples shall be taken
D280 Test Methods for Hygroscopic Moisture (and Other
from different packages in the ratio of two samples for each
Matter Volatile Under the Test Conditions) in Pigments
10 000 lb (5000 kg), except that for shipments of less than
D387 Test Method for Color and Strength of Chromatic
10 000 lb two samples shall be taken. At the option of the
Pigments with a Mechanical Muller
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
5. Test Methods
3.1 The pigment shall conform to the following require-
5.1 Tests shall be conducted in accordance with the follow-
ments:
ingASTMtestmethods.TestproceduresnotcoveredbyASTM
test methods shall be mutually agreed upon between the
Fe O , min, % 96.0
2 3
Moisture and other volatile matter, max, % 1.0
purchaser
...

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