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Bills and George,,

> A highly polished black surface
> (like a clean new black car) will want to
> absorb all visible wave lengths by virtue of being black,
> but actually acts
> like a mirror because of the polished surface,

Does not blue or red clean new car act the same way?

> Note at least one sextant handbook suggests you can breath
> life back into a dead rear-silvered sextant mirror
> by painting the back
> black.

I mentioned this book in the P.S. of my message to which
you are replying. I understand why he recommends this and
I think this is a different situation from what we have in
art horizons.

On another suggestion, to use black tea,
it should have the same problems as water I used:
too liquid, too much disturbed by vibration.
A more viscous liquid should be more appropriate
(unless you have a really solid foundation like a concrete
slab:-)

Alex.

   

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