>Date: Sat, 15 Apr 2000 21:43:41 +0930
>Subject: [M]: Using Collodion
>
>I used it once, with success, but a pain to work with. Be careful that you
>get NON FLEXIBLE collodion. There is also Flexible collodion which has oil
>mixed in it which will create one lovely horror on your optics. I don't
>recommend it. There are other, easier, and equally good methods to be
>found. Check Ed's site and the archives. We discussed this at length two
>years ago.

Two comments:
a) They mean it; Do Not Use Flexible Collodion!
b) Build a good dam around the edge of the mirror if cleaning in the
cell. When I had to work on refurbishing a 26 inch scope (now getting
good use at the University of Central Florida) I found that the mirror
had been cleaned with collodion which had run over the edge and down
onto the mirror support mechanisms which were literally glued in place.
Images had been really awful and the frozen multipoint suspension must
have been one reason.
--
John Oliver
Associate Professor of Astronomy
University of Florida

Netscape Champion

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