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Parylene as Tarnish Resistent


#1

I checked out Parylene from the link in the Orchid thread:

Is Parylene appropriate for preventing gold/silver/copper/brass
alloys from tarnishing? I'm looking for something as invisible
possible which would hold up over time. This would be for
decorative objects on display. 

This is the response I received (from the makers of parylene):

Parylene will “dull” the luster of gold or silver. So I don’t think
it will work for you.

Patrick

Patrick Cleveland, Ph.D.
V&P Scientific, Inc.
http://www.vp-scientific.com/


#2

Janet,

This is the response I received (from the makers of parylene):
Parylene will "dull" the luster of gold or silver. So I don't
think 

I would like to run a test using a mirror finish gold substrate, and
report back my findings. I have several I can use but probably only
need one. “I don’t think it will work” as opposed to “It will not
work” means I have a chance!

On two web sites I read that the coatings were optically clear.
“Parylene exhibits very little absorption in the visible region and
is, therefore, transparent and colorless.”

http://www.scscoatings.com/docs/coatspec.pdf

I assumed that such a conformal coating would also deposit
uniformly, leaving no lumpy surface to scatter light. I ask myself,
“How lumpy could it be at 1.5 micrometer thickness?”

Regards,
Jeff