MIL-DTL-15665J
3.7 Finish. Unless otherwise specified, the front and edges
(surfaces visible from the front) shall be finished as specified on the
applicable specification sheet and shall match the TIOH standard enamel
color, epoxy color or metal finish chips as required (see 2.2.2). Where
plating or oxidizing is specified, the entire item (front, back and
edges), except attaching devices, shall be plated or oxidized. Unless
otherwise specified, the backs of all oxidized items shall be clean and
uniformly oxidized. Army enlisted branch of service insignia and collar
insignia may be gold plated for commercial sale. In addition to the
finish specified, all insignia, except Marine Corps black enameled
insignia and gold plated insignia, shall be thoroughly coated (front, back
and edges) with clear lacquer specified in 3.4.9. Army enlisted branch of
service and collar insignia need only be lacquered on the front surface
and edges. At the option of the manufacturer, any gold plated insignia
may be lacquered. Marine Corps black colored insignia shall be given a
black chemical finish (front, back and edges) conforming to MIL-F-495.
The face and edges of the insignia shall then be coated with flat dull
black baking enamel specified in 3.4.8.3.
3.7.1 Plating. All plating shall be by electroplating methods. The
plating shall be continuous and unbroken over the entire plated surface.
There shall be no cut-through, shade, peeled, or blistered plating.
Plating of attaching devices will not be required.
3.7.1.1 24 karat gold plating. The gold plating shall be
accomplished using gold specified in 3.4.2.1. The use of nickel as an
undercoating with 24 karat gold shall not be permitted. When tested as
specified in 4.5.3, no visible chemical reaction such as evolution of
gases shall appear.
3.7.1.2 22 karat gold plating. The gold plating shall be
accomplished using gold specified in 3.4.2.2. The use of nickel as an
undercoating shall be permitted. When tested as specified in 4.5.3, no
visible chemical reaction such as evolution of gases shall appear.
3.7.1.3 Nickel plating. Nickel for plating shall be the nickel
specified in 3.4.4 and shall be not less than 0.0003 inch (0.0008 cm)
thick. Testing shall be standard commercial. In case of a dispute,
testing shall be in accordance with ASTM-B-487.
3.7.1.4 Nickel underplating. When nickel underplating is specified,
nickel specified in 3.4.4 shall be used and shall be not less than 0.00025
inch (0.000635 cm) thick. Testing shall be standard commercial. In case
of a dispute, testing shall be in accordance with ASTM-B-487.
3.7.1.5 Silver plating. Silver plating shall be accomplished using
the silver specified in 3.4.5. After finishing, the silver plating shall
be a minimum of 0.0003 inch (0.0008 cm) thick. Testing shall be standard
commercial. Items made of brass shall be silver thickness tested on the
obverse side. In case of a dispute, testing shall be conducted in
accordance with ASTM-B-487.
3.7.1.6 Rhodium Plating. When rhodium plating is specified, rhodium
specified in 3.4.6 shall be used. When tested as specified in 4.5.3, no
chemical reaction shall occur. When rhodium plating is required over
brass, nickel underplating specified in 3.4.4 shall be required.
3.7.2 Enameling. Unless otherwise specified on the applicable
specification sheet, all enameling shall be accomplished using hard enamel
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