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echo: atm
to: ATM
from: mjc5{at}psu.edu
date: 2003-08-21 14:21:36
subject: Re: ATM re: microfacetting pitch lap during final mirror steps

From: mjc5{at}psu.edu
To: atm{at}shore.net
Reply-To: mjc5{at}psu.edu


Bob Massullo wrote in part:
>wire lath used for plaster walls and anchoring thin-set (for those who do
>home improvement) is made with a rather sharp open "weave" to it (about
>1/4" - 3/8").  Has anyone used this to press a pattern into a
pitch lap,
>either by itself, or with a microfacetting screen? By itself, it could be a
>"midway point" between larger facets and microfacets, without
the need to
>use a microfacet screen (I use that term to encompass the many materials
>that fit into this category). The wire lath is pretty sharp (meaning it will
>produce small cuts in your fingers), and would seem to cut more definitely
>into the pitch while pressing. It would also produce a diamond pattern
>throughout.
>
>I realize there are probably many ways to make microfacetting work, but I
>was just curious if anyone has tried this particular method. If not, I will
>let the list know of my results.

        You could try it. I never thought about anything but the lace
with the little hex patterns in it because it was so easy to do. As long as
it doesn't tear up the surface too badly, it should do the job as well.

        As for the regularity of the weave, it really isn't all that
important. In fact, if there *were* to be any advantage, I suspect it would
be in a random pattern, not the hex shapes I end up with, or your diamond
pattern. But that is all conjecture. The proper methods of polishing will
make even those patterns act like a random surface pattern.

        Finally you are correct, there are many paths to a good mirror.

        - Mike -

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