ASTM D267-82(2020)

Standard Specification for Gold Bronze Powder

ABSTRACT
This specification covers the materials commercially known as gold bronze, pale gold bronze, and rich gold bronze powders. The gold bronze powder shall be made from new ingot metals, shall consist of fine polished flakes containing the prescribed percentage of fatty or oily matter (polishing lubricant), shall have the specified residue content and leafing properties, and shall be suitable for making gold bronze paint. The sampling and test methods to determine conformance to the specified composition and properties are given.
SCOPE
1.1 This specification covers the materials commercially known as gold bronze, pale gold bronze, and rich gold bronze powders.  
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
1.3 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: 31-May-2020
• ICS: 87.060.99 - Other paint ingredients
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.31 - Pigment Specifications

Relations

• Replaces: ASTM D267-82(2014) - Standard Specification for Gold Bronze Powder
• Effective Date: 01-Jun-2020
• Refers: ASTM D480-88(2020) - Standard Test Methods for Sampling and Testing of Flaked Aluminum Powders and Pastes
• Effective Date: 01-Jun-2020
• Refers: ASTM D480-88(2014) - Standard Test Methods for Sampling and Testing of Flaked Aluminum Powders and Pastes
• Effective Date: 01-Dec-2014
• Refers: ASTM D480-88(2008) - Standard Test Methods for Sampling and Testing of Flaked Aluminum Powders and Pastes
• Effective Date: 01-Jul-2008
• Refers: ASTM D185-07 - Standard Test Methods for Coarse Particles in Pigments
• Effective Date: 01-Jul-2007
• Refers: ASTM D480-88(2003) - Standard Test Methods for Sampling and Testing of Flaked Aluminum Powders and Pastes
• Effective Date: 01-Oct-2003
• Refers: ASTM D13-02 - Standard Specification for Spirits of Turpentine (Withdrawn 2007)
• Effective Date: 10-May-2002
• Refers: ASTM D480-88(1999) - Standard Test Methods for Sampling and Testing of Flaked Aluminum Powders and Pastes
• Effective Date: 10-Jul-1999
• Refers: ASTM D185-84(1999) - Standard Test Methods for Coarse Particles in Pigments, Pastes, and Paints
• Effective Date: 10-May-1999
• Refers: ASTM D13-97 - Standard Specification for Spirits of Turpentine
• Effective Date: 01-Jan-1997

Overview

ASTM D267-82(2020): Standard Specification for Gold Bronze Powder is an internationally recognized standard developed by ASTM International. This specification defines requirements for gold bronze, pale gold bronze, and rich gold bronze powders used primarily in coatings and decorative applications. The document details the necessary composition, physical properties, and quality control procedures to ensure consistent product performance, specifically for use in gold bronze paint formulations. The standard also addresses recommended test and sampling methods to verify compliance.

Key Topics

• Material Scope: The standard applies to commercially available gold bronze powders, including pale and rich variants, made from new ingot metals.
• Composition: Gold bronze powders must consist of fine, polished flakes and contain a minimum percentage of fatty or oily matter, which acts as a polishing lubricant to enhance leafing properties.
• Leafing Properties: An important characteristic, leafing refers to the powder’s ability to form a continuous, shiny film when mixed with a suitable liquid. ASTM D267-82(2020) specifies testing protocols to evaluate this property.
• Residue Content: The specification sets a maximum residue retained on a No. 100 (150-µm) sieve, ensuring product uniformity and performance consistency.
• Suitability for Paints: Gold bronze powder must match prescribed shades and fineness standards, making it suitable for high-quality metallic paints.
• Sampling and Testing: The document outlines sampling techniques and references established ASTM test methods, supporting robust quality control and verification.

Applications

ASTM D267-82(2020) is essential for industries involved in:

• Decorative Coatings: Utilized in the manufacturing of metallic paints for various substrates, offering a gold-like, lustrous finish highly desirable in architectural, automotive, and specialty product markets.
• Printing Inks: Gold bronze powder is frequently incorporated into inks to produce visually striking and durable prints for packaging, labels, and decorative graphics.
• Crafts and Artwork: Artists and craftspeople rely on gold bronze powders for gilding, restoration, and decorative design applications.
• Industrial Components: Provides a metallic finish for functional or decorative coatings in machinery, appliances, and consumer products.

By adhering to ASTM D267-82(2020), manufacturers, suppliers, and end-users benefit from consistent product quality, performance, and regulatory compliance.

Related Standards

When working with gold bronze powders, consider the following related ASTM and federal standards:

• ASTM D13: Specification for Spirits of Turpentine, which may be used as a solvent in gold bronze paint formulations.
• ASTM D185: Test Methods for Coarse Particles in Pigments, referenced for residue analysis.
• ASTM D480: Test Methods for Sampling and Testing of Flaked Aluminum Powders and Pastes, applicable for evaluating certain properties of gold bronze powder.
• U.S. Federal Specification A-A-1800: Water-Resisting Spar Varnish, relevant when preparing mixtures for leafing tests.

Summary

Following the ASTM D267-82(2020) Standard Specification for Gold Bronze Powder assures stakeholders of material performance and aids in the production of decorative coatings and paints with consistent color, leafing, and surface quality. Regular updates and strong international backing make this standard an essential resource for manufacturers and users in the coatings and pigments industry. For complete test procedures and compliance details, refer directly to the official ASTM documentation.

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: D267 −82 (Reapproved 2020)
Standard Specification for
Gold Bronze Powder
This standard is issued under the fixed designation D267; 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 The residue retained on a No. 100 (150-µm) sieve, using
alcohol as the wash liquid, shall not exceed 0.2 % (in accor-
1.1 This specification covers the materials commercially
dance with Test Methods D185).
known as gold bronze, pale gold bronze, and rich gold bronze
powders.
3.3 The powder shall have good “leafing” properties. (By
“leafing” is understood the property of forming an apparently
1.2 The values stated in inch-pound units are to be regarded
continuous brilliant film over the entire free surface of a
as standard. The values given in parentheses are mathematical
mixture of the powder in a suitable liquid (Note 1), within 1
conversions to SI units that are provided for information only
min after cessation of stirring the mixture.) In testing for
and are not considered standard.
leafing properties the powder shall be mixed in the proportion
1.3 This international standard was developed in accor-
of 3 to 4 lb (370 to 475 g/L) to a gallon (3.8 L) of the liquid.
dance with internationally recognized principles on standard-
As thus mixed it shall also give a free flowing, smooth,
ization established in the Decision on Principles for the
continuous coating in accordance with Test Methods D480.
Development of International Standards, Guides and Recom-
NOTE 1—A suitable liquid is made by mixing spar varnish conforming
mendations issued by the World Trade Organization Technical
to the U. S. Federal Specification for Water-Resisting Spar Varnish (No.
Barriers to Trade (TBT) Committee.
A-A-1800) with turpentine conforming to Specification D13 in such
proportions that the mixture will have a viscosity of 0.65 to 0.85 poises (B
2. Referenced Documents
to C on the Gardner-Holdt scale).
2.1 ASTM Standards:
3.4 The gold bronze powder shall be suitable for making
D13 Specification for Spirits of Turpentine
gold bronze paint. It shall match in shade and fineness a
D185 Test Methods for Coarse Particles in Pigments
reference sample mutually agreed upon by the purchaser and
D480 Test Methods for Sampling and Testing of Flaked
the seller.
Aluminum Powders and Pastes
4. Sampling
2.2 U.S. Federal Specification:
A-A-1800 Water-Resisting Spar Varnish
4.1 Two samples shall be taken at random from different
packages from each lot, batch, day’s pack, or other unit of
3. Composition and Properties
production in a shipment. When no markings distinguishing
between units of production appear, samples shall be taken
3.1 The bronze powder shall be made from new ingot
from different packages in the rati
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