Silver replacement, decorative black nickel, Auruna goldSilver replacement, decorative black nickel, Auruna goldSilver replacement, decorative black nickel, Auruna gold
Semiconductor Industry:
General Metal Finishing

NEW! Bilingual brochure  from Uyemura discusses Umicore Galvanotechnik  precious metal  electrolytes for functional and decorative plating
Bilingual brochure
from Uyemura
precious metal electrolytes
, including Auruna gold processes and Miralloy nickel alternative.

Jewelry Finishes: Silver Alternative,
Decorative Black Nickel, and More

Silver replacement, decorative black nickel, Auruna gold
Silver replacement, decorative black nickel, Auruna gold
Silver replacement, decorative black nickel, Auruna gold

Miralloy – An electroplating alloy
combination of tin, copper and zinc,
is an excellent silver alternative that is tarnish-free.
It is also an excellent substitute for nickel for zippers,
buttons and clasps. Approximately 20% of the world’s
population has a skin reaction to nickel metal.
The longer this metal is in contact with skin,
the more likely it is to cause a burn.

Miralloy is a high-quality, cost-effective silver alternative finish
that is inert and long-lasting. It’s available in white or yellow
versions (the latter is an under-plate for gold) and is used
worldwide for zippers, buttons, clasps and decorative metal
on all types of apparel.

The white version is often referred to as “white bronze.” It doesn’t
tarnish and withstands normal clothes washing and drying.

Miralloy silver alternative is also available in a lead-free white version,
and this is the variation most often used in North America.

Nickstar Black Nickel Nickstar – a decorative black nickel technology
that deposits a thin, and highly uniform over-coat of black nickel-zinc
alloy, preserving the substrate's brightness while producing an
exceptionally rich black nickel finish.

Rhoduna Alloy – the world's first galvanic rhodium alloy, formulated
from rhodium and ruthenium. It provides whiteness and performance
characterstics equal to the highest-quality rhodium coatings, with even
greater smoothness and durability.

Black Ruthenium – considered by many to be among the most
attractive finishes. This process produces a deep, dark plated
surface that closely resembles fine onyx. It seems to reflect and
absorb light simultaneously. On large jewelry pieces, it is the perfect
offset for gold. It is also an elegant finish for upscale eyewear.
Auruna Gold Plating process are also available for various
requirements, whether related to color, hardness, or purity.

Platinodes – a product of German engineering, these are
the most sophisticated platinized titanium anodes available.
Conventional anodes are either platinum plated (leaving micro-
pores) or clad (leaving micro-cracks). To counteract the aggressive
nature of gold or rhodium plating (with the combination of electricity
and chemistry both working to shorten the anode’s life), these
anodes are plated in a unique molten platinum method — thus
avoiding the cracks or pores and extending anode life. These
anodes are available in a combination of mesh sizes, platinum
thicknesses, and single or double-sided coatings.


Auruna, Platinode, TD, J-1, J-2, and Miralloy are trademarked
products of Umicore-GT.

Uyemura jewelry finishes include Miralloy nickel alternative, white bronze, lead-free white bronze,
black ruthenium, gold plating, white rhodium, and highly
reflective plating processes for fine gemstones.

Corporate Headquarters:
3990 Concours, #425 • Ontario, CA 91764 • ph: (909) 466-5635

Tech Center:
240 Town Line Road • Southington, CT 06489 • ph: (860) 793-4011

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