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.

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Publication Date
30-Jun-2008
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Technical specification
ASTM D267-82(2008)e1 - Standard Specification for Gold Bronze Powder
English language
2 pages
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
´1
Designation:D267 −82(Reapproved 2008)
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.
ε NOTE—The units statement in subsection 1.2 was corrected editorially in July 2008.
1. Scope 3.3 The powder shall have good “leafing” properties. (By
“leafing” is understood the property of forming an apparently
1.1 This specification covers the materials commercially
continuous brilliant film over the entire free surface of a
known as gold bronze, pale gold bronze, and rich gold bronze
mixture of the powder in a suitable liquid (Note 1), within 1
powders.
min after cessation of stirring the mixture.) In testing for
1.2 The values stated in inch-pound units are to be regarded
leafing properties the powder shall be mixed in the proportion
as standard. The values given in parentheses are mathematical
of 3 to 4 lb (370 to 475 g/L) to a gallon (3.8 L) of the liquid.
conversions to SI units that are provided for information only
As thus mixed it shall also give a free flowing, smooth,
and are not considered standard.
continuous coating in accordance with Test Methods D480.
2. Referenced Documents NOTE 1—A suitable liquid is made by mixing spar varnish conforming
to the U. S. Federal Specification for Water-Resisting Spar Varnish (No.
2.1 ASTM Standards:
A-A-1800) with turpentine conforming to Specification D13 in such
D13 Specification for Spirits of Turpentine
proportions that the mixture will have a viscosity of 0.65 to 0.85 poises (B
to C on the Gardner-Holdt scale).
D185 Test Methods for Coarse Particles in Pigments
D480 Test Methods for Sampling and Testing of Flaked
3.4 The gold bronze powder shall be suitable for making
Aluminum Powders and Pastes
gold bronze paint. It shall match in shade and fineness a
2.2 U.S. Federal Specification:
reference sample mutually agreed upon by the purchaser and
A-A-1800 Water-Resisting Spar Varnish
the seller.
3. Composition and Properties
4. Sampling
3.1 The bronze powder shall be made from new ingot
4.1 Two samples shall be taken at random from different
metals. It shall consist of fine polished flakes containing not
packages from each lot, batch, day’s pack, or other unit of
less than 3 % of fatty or oily matter (polishing lubricant) to
production in a shipment. When no markings distinguishing
give good “leafing” properties.
between units of production appear, samples shall be taken
from different packages in the ratio of two samples for each 5
3.2 The residue retained on a No. 100 (150-µm) sieve, using
tons (inch-pound or SI), except that for shipments of less than
alcohol as
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