Re: [ATM] Good Cement for Glass Prisms?

["Bob May" <rmay@nethere.com>]

My suspicions are that it is Canada Balsam that was used for the
original adhesive.
Can't remember the solvent for it at the moment but somebody else
can pop up and tell what is the best.  If so, just put a little
wash on the prism or the plate and put them together again.
If I used superglue to put them together again, I'd use the stuff
that they put rear view mirrors for cars back on again as that
type is thicker and will flex with the temp changes.
Bob May

rmay at nethere.com
http: slash /nav.to slash bobmay
http: slash /bobmay dot astronomy.net

----- Original Message -----
From: David Sleeter <d.sleeter@roadrunner.com>
To: <atm@atmlist.net>
Sent: Sunday, May 11, 2008 2:02 PM
Subject: [ATM] Good Cement for Glass Prisms?


> Hi Folks:
>
> I have a Zeiss stereo microscope with 2 large prisms in its
binocular head,
> and the 2 prisms have come loose from their mountings. Each
prism was
> originally cemented by one of its ground glass sides to an
approx. 1/2" dia.
> spacer disk. To repair the scope, I need to glue the prisms
back in their
> original locations, and I'm wondering what kind of cement you
experts would
> recommend.
>
> The original cemented joint shows none of the globby residue
that you get
> with Duco cement or epoxy. What residue remains is just a very
thin film,
> and that leads me to suspect that Zeiss might have used a
cyanoacrylate
> cement.
>
> It would be nice if I could find what I need at the hardware
store, and I'm
> wondering if Krazy Glue would work. If not Krazy Glue, then
what? In anyone
> knows EXATCLY what Zeiss used, and where I can buy it, that
would be
> fantastic. All suggestions will be appreciated. Thanks,
>
> Dave Sleeter
>
> _______________________________________________
> ATM mailing list http://www.atmlist.net/
>

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