ASTM D3722-05(2019)
(Specification)Standard Specification for Natural Red and Brown Iron Oxide Pigments
Standard Specification for Natural Red and Brown Iron Oxide Pigments
ABSTRACT
This specification covers red and brown pigments of dry and wet ground natural iron oxide, dry and wet ground calcined natural iron oxide, and mixtures of these with synthetic iron oxides. These pigments are suitable for such applications as paints and coatings. Specimens shall be sampled and suitably undergo chemical analysis for total iron oxide, sulfur as sulfates, organic coloring matter, matter soluble in water, coarse particles in dry pigment, and moisture and other volatile matter. The pigments shall also conform to specified mass color, tint character, and tinting strength as mutually agreed upon between purchaser and seller.
SCOPE
1.1 This specification covers dry and wet ground naturally occurring iron oxide, dry and wet ground calcined naturally occurring iron oxide, and mixtures of these with synthetic iron oxides. These pigments are suitable for use in paints, coatings, and many other applications.
1.2 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
- Status
- Published
- Publication Date
- 30-Apr-2019
- Technical Committee
- D01 - Paint and Related Coatings, Materials, and Applications
- Drafting Committee
- D01.31 - Pigment Specifications
Relations
- Effective Date
- 01-May-2019
- Effective Date
- 01-Jun-2019
- Effective Date
- 01-Nov-2012
- Effective Date
- 01-Nov-2012
- Effective Date
- 01-Jun-2011
- Effective Date
- 01-Jul-2007
- Effective Date
- 01-Jun-2007
- Effective Date
- 01-Feb-2007
- Effective Date
- 01-Sep-2005
- Effective Date
- 10-May-2001
- Effective Date
- 10-May-2001
- Refers
ASTM D185-84(1999) - Standard Test Methods for Coarse Particles in Pigments, Pastes, and Paints - Effective Date
- 10-May-1999
- Effective Date
- 10-May-1999
- Effective Date
- 10-Nov-1996
- Effective Date
- 10-Nov-1996
Overview
ASTM D3722-05(2019) - Standard Specification for Natural Red and Brown Iron Oxide Pigments establishes the requirements for natural red and brown iron oxide pigments, including dry and wet ground, calcined, and their mixtures with synthetic iron oxides. These pigments are widely used in applications such as paints and coatings due to their desirable color properties and stability. The standard ensures that the physical and chemical properties of the pigments meet established quality benchmarks, supporting both manufacturers and end-users in achieving consistent results.
Key Topics
Composition Requirements: The standard specifies that the pigments must contain at least 40% total iron oxide (Fe2O3). The presence of organic coloring matter is not permitted. It also sets maximum limits for:
- Moisture and volatile matter (1.0%)
- Total sulfates expressed as SO3 (2.0%)
- Matter soluble in water (2.0% for general use, 1.0% for primer pigments)
- Coarse particles (maximum residue of 2% on a No. 325 sieve, 45 µm)
Color and Tinting Strength: The mass color and tinting strength, including their character when mixed with a white pigment, must conform to mutually agreed-upon standards between purchaser and seller, ensuring flexibility for specific application requirements.
Sampling Procedures: The standard outlines sampling requirements to ensure representative analysis. Two samples are taken from different packages of each production lot, and testers may choose to test these separately or as a composite.
Test Methods: Compliance with chemical and physical properties is to be verified through referenced ASTM test methods, including:
- ASTM D50 (for chemical analysis of pigments)
- ASTM D185 (for coarse particles)
- ASTM D280 (for moisture and volatile matter)
- ASTM D1208 (for common pigment properties)
Applications
Natural red and brown iron oxide pigments specified in ASTM D3722-05(2019) are suitable for various industrial and commercial applications, such as:
- Paints and Coatings: These pigments provide stable colorants for exterior and interior architectural paints, industrial coatings, and protective coatings, offering long-term color retention and resistance to environmental factors.
- Construction Materials: Utilized in coloring concrete, bricks, tiles, and pavers, these pigments enhance aggregate aesthetics while maintaining durability.
- Plastics and Polymers: Some formulations include these pigments to impart natural color in molded products.
- Art and Restoration: Used in artworks, historical restoration projects, and decorative finishes where authentic earth tones are required.
By adhering to this standard, manufacturers and users can assure product consistency, regulatory compliance, and performance reliability.
Related Standards
Several other ASTM and international standards are referenced or relevant to natural iron oxide pigments, including:
- ASTM D50 - Test Methods for Chemical Analysis of Yellow, Orange, Red, and Brown Pigments Containing Iron and Manganese
- ASTM D185 - Test Methods for Determination of Coarse Particles in Pigments
- ASTM D280 - Test Methods for Hygroscopic Moisture and Other Volatile Matter in Pigments
- ASTM D1208 - Test Methods for Common Properties of Certain Pigments
Following these referenced standards ensures thorough quality control and alignment with industry best practices for pigment manufacturing and application.
By implementing ASTM D3722-05(2019), manufacturers, specifiers, and users benefit from standardized quality, global market acceptance, and consistent pigment performance across a diverse range of end uses. For more information, access the full text at ASTM International.
Frequently Asked Questions
ASTM D3722-05(2019) is a technical specification published by ASTM International. Its full title is "Standard Specification for Natural Red and Brown Iron Oxide Pigments". This standard covers: ABSTRACT This specification covers red and brown pigments of dry and wet ground natural iron oxide, dry and wet ground calcined natural iron oxide, and mixtures of these with synthetic iron oxides. These pigments are suitable for such applications as paints and coatings. Specimens shall be sampled and suitably undergo chemical analysis for total iron oxide, sulfur as sulfates, organic coloring matter, matter soluble in water, coarse particles in dry pigment, and moisture and other volatile matter. The pigments shall also conform to specified mass color, tint character, and tinting strength as mutually agreed upon between purchaser and seller. SCOPE 1.1 This specification covers dry and wet ground naturally occurring iron oxide, dry and wet ground calcined naturally occurring iron oxide, and mixtures of these with synthetic iron oxides. These pigments are suitable for use in paints, coatings, and many other applications. 1.2 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
ABSTRACT This specification covers red and brown pigments of dry and wet ground natural iron oxide, dry and wet ground calcined natural iron oxide, and mixtures of these with synthetic iron oxides. These pigments are suitable for such applications as paints and coatings. Specimens shall be sampled and suitably undergo chemical analysis for total iron oxide, sulfur as sulfates, organic coloring matter, matter soluble in water, coarse particles in dry pigment, and moisture and other volatile matter. The pigments shall also conform to specified mass color, tint character, and tinting strength as mutually agreed upon between purchaser and seller. SCOPE 1.1 This specification covers dry and wet ground naturally occurring iron oxide, dry and wet ground calcined naturally occurring iron oxide, and mixtures of these with synthetic iron oxides. These pigments are suitable for use in paints, coatings, and many other applications. 1.2 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
ASTM D3722-05(2019) is classified under the following ICS (International Classification for Standards) categories: 87.060.10 - Pigments and extenders. The ICS classification helps identify the subject area and facilitates finding related standards.
ASTM D3722-05(2019) has the following relationships with other standards: It is inter standard links to ASTM D3722-05(2011), ASTM D1208-96(2019), ASTM D1208-96(2012), ASTM D280-01(2012), ASTM D50-90(2011), ASTM D185-07, ASTM D1208-96(2007), ASTM D280-01(2007), ASTM D50-90(2005), ASTM D280-01, ASTM D280-81(1995), ASTM D185-84(1999), ASTM D50-90(1999), ASTM D1208-96, ASTM D1208-96(2002). Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
ASTM D3722-05(2019) is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D3722 −05 (Reapproved 2019)
Standard Specification for
Natural Red and Brown Iron Oxide Pigments
This standard is issued under the fixed designation D3722; 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
Total iron as Fe O , min, % 40.0
2 3
Moisture and other volatile matter, max, % 1.0
1.1 This specification covers dry and wet ground naturally
Organic coloring matter none
occurring iron oxide, dry and wet ground calcined naturally Total sulfates expressed as SO , max, % 2.0
Matter soluble in water, max, % 2.0
occurring iron oxide, and mixtures of these with synthetic iron
Matter soluble in water, max, % (primer pigments) 1.0
oxides. These pigments are suitable for use in paints, coatings,
Coarse particles (total residue retained on a No. 325 2.0
and many other applications. (45-µm) sieve) max, %
3.2 The mass color and character of the tint and the tinting
1.2 This international standard was developed in accor-
strength formed by a mixture with a white pigment shall be
dance with internationally recognized principles on standard-
within mutually agreed upon limits of a standard acceptable to
ization established in the Decision on Principles for the
both the purchaser and the seller.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
4. Sampling
Barriers to Trade (TBT) Committee.
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
D50 Test Methods for ChemicalAnalysis ofYellow, Orange,
from different packages in the ratio of two samples for each 5
Red, and Brown Pigments Containing Iron and Manga-
tons (inch-pound or SI), except that for shipments of less than
nese
10 000 lb two samples shall be taken. At the option of the
D185 Test Methods for Coarse Particles in Pigments
purchaser, the samples may be tested separately, or after
D280 Test Methods for Hygroscopic Moisture (and Other
blending in equal quantities the samples from the same
Matter Volatile Under the Test Conditions) in Pigments
production unit to form a composite sample.
D1208 Test Methods for Common Properties of Certain
5. Test Methods
Pigments
5.1 Tests shall b
...
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