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.

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Published
Publication Date
31-May-2020
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ASTM D267-82(2020) - Standard Specification for Gold Bronze Powder
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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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