
Nickel
Plated Roller
(0.002" and polish)
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Nickel is an ideal coating to apply to mild steel for
corrosion prevention.
Nickel plating prior to chrome is becoming very popular
as a method of prolonging the life of chrome plated
rollers, cylinders and shafts. The thicker the deposit
the better the protection. Items that are working in
damp salty environments required a minimum of 125
microns (0.005") deposit, ideally 250 microns (0.010").
Items not subject to salt may have a thinner deposit,
with 50 microns (0.002") being the minimum recommended.
A
minimum of 50 microns (0.002") nickel deposit is
recommended as a protective coating to steel rollers
prior to ceramic coating.
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Anilox
Roll
(enlarged section)
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There
are some items where 50 microns (0.002") would be
impractical such as anilox rolls. These rolls have very
small cells and any deposit over 7.5 microns (0.0003")
could fill in these cells.
The
requirement for anilox rolls to be nickel plated prior
to chrome has come about in recent years, due to the
shift from the use of solvent based inks to those which
are water based. This is due to increasing environmental
regulations and Health & Safety concerns over
solvent use. Water very quickly penetrates the chrome,
attacking the base (usually copper or steel). An under
coating of nickel greatly extends the life of the
engraving.
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