Black Nickel Plating

BlackNight produces a deep black finish, with exceptional hardness,
and dense topography. This is an entirely new film “shape” with extraordinary micro-uniformity and corrosion resistance.

Recent developments in nickel overplates and co-deposited blackening agents have
yielded a process that delivers both a dark black surface and very high hardness values.
“BlackNight” has been adapted to use an electroless nickel rather than an electroplated
nickel underlayer and overplate. This allows the plating of complex part geometries with
a uniform nickel thickness.
The BlackNight process uses a standard EN underplate followed by a thin mid phos
electroless Ni-P deposit layer. This thin 5 micron electroless Ni-P overplate is a lead-free
ELV, WEE and RoHS compliant layer that serves as both the seed layer and a
topography matrix for the blackening deposit. A hardness of 600-80HV can be
Improved L values and low reflectance result from two factors: the deposited matrix
that has been developed through use of a specific mid phos electroless Ni-P overplate,
and a blackening agent electrolyte that uniformly etches, and deposits an Ni2O3-
enriched surface.


Nickstar deposits a thin, highly uniform over-coat of black nickel-zinc alloy,
preserving substrate brightness while producing a rich black nickel finish. The process is
exceptionally versatile: A deposit thickness up to 2 micron can be achieved with rack or
barrel. If a thicker deposit – or very high corrosion performance – is desired, a heavy
nickel undercoat can be used. Greater hardness can be achieved with a salt additive.
Color density, from darkest black to softer hues, can be modified using a hull cell.
Nickstar decorative black nickel can be dual-toned with UIC satin nickel for a distinctive
and elegant finish.
Nickstar black nickel plating is well-suited for automotive interiors and for upscale
sporting goods, where it diminishes glare and improves durability. It is also ideal for
hardware, plumbing, architectural and other decorative uses that demand a luxurious
finish with a long service life.


Nicostar uses the highly successful Nickstar chemistry as its base, and adds
cobalt for enhanced hardness. Nicostar’s black nickel-cobalt-zinc alloy deposit preserves
the brightness of the substrate. A nickel underplate can be used if enhanced corrosion
protection is needed.
Tech-Knowledge provides full coverage and technical support for Uyemura materials in

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