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dcaster@krl.org · Guest

A local company makes some devices for aiming xray machines. The
device projects a cross hair where the xray beam goes. Anyway on a new
model some of the light bounces off a black anodized surface and
reduces the contrast as well as showing up outside of where the light
should be. They are looking at various ways to fix this. And one way
might be to just use a better black anodize. Redesigning the part can
be done, but there are a lot of constraints on doing that.

Rummaging around on the internet, I found a few old references to
Martin Black and Ball Black being coatings especially made for
adsorbing light. Martin being Martin before it merged with Lockheed.
And Ball being Ball Aerospace. Does anyone have any experience with
either of these finishes? And is either of them licensed to commercial
anodize firms? Or would one have to send the parts to Ball Aerospace
in Colorado?

Dan

P.S. if you want to email me direct, my email address is dlcaster57 @
yahoo. com without the spaces.