From: Emery Greg 
Cc: atm{at}shore.net
Reply-To: Emery Greg 


Hi Russ:

I had some Medium Burgundy that was too soft when I was using it last
summer in my garage.  I added some beeswax to it.  (I added about 5 to 10%
by volume of pitch).  I read here on the list, or somewhere else, that some
also put talc in the mix with the beeswax.  I'm assuming the talc adds
strength/viscosity to the pitch lowering the flow.  The beeswax worked well
for me.  (My wife didn't even notice that here kilogram of pure beeswax and
croc pot were missing for a couple of weeks - " Sorry Dear, can't
unmix pitch and beeswax, I really am sorry about that") :)

----- Original Message -----
From: Russell Jocoy 
Date: Wednesday, July 16, 2003 8:52 pm
Subject: Re: ATM Cookin' up a scope

>
> >From: "Bob May" 
> >Reply-To: "Bob May" 
> >To: "atmlist" 
> >Subject: Re: ATM Cookin' up a scope
> >Date: Wed, 16 Jul 2003 10:17:27 -0700
> >
> >The secondary cage needs to be a good inch or more larger than
> the primary
> >mirror just so you don't have vignetting of the image.
> >Go get Newt1.5 on the web (it's free!) and see what things are like.
> >I've used some of the Willmann-Bell pitch and have found it to be
> rather>erratic as to the temp range it wants to work in.  Some has
> been very soft
> >while other stuff has been quite firm.  You won't know until you
> use it.
> >The Gugolz 64 is probably at the warm end of it's range at 75F as
> I would
> >suspect.  I've been using the 73 stuff and it seems to work fine
> at the
> >typical room temp.  I'd still use it and see what it does.  You will
> >problably find that the lap will be a little soft and may close
> up the gaps
> >in a few hours of work.
> >Bob May
> >http://nav.to/bobmay
> >bobmay{at}nethere.com
> >NEW! http://bobmay.astronomy.net
> >
> >
> >
>
>
> ("atm{at}shore.net")
>
>   Bob,
>
> Thanks for your insights. I will experiment with the burgandy
> pitch and
> possibly evaporate some
> solvents to make a harder pitch. I may mix some of my overflow
> Gugolz 65. I
> am not in a hurry and
> I love to experiment, ( I guess thats why my first mirror is 5/8"
> thick)  It
> is not a walk in the park to
> figure but more like a camp out until  the fire goes out.  The
> campfire is
> still blazing and I have
> many more logs to put on the fire.    That may sound corny but I
> have found
> a way to create an eye
> to the universe by my own hands ( as many have before) and it
> feels good on
> the trip to the star test.
>               Thanks to all on the list for their comments and
> advice, I
> will continue to let everyone know
> my progress as time goes on, I myself enjoy reading others
> journeys through
> this age old process
> of making a flat piece of glass into a window to the cosmos by
> their own
> hand...  grind on, polish on,
> and figure the best you can do,  all this equals determination,
> experimentation, and exploration in the
> end. May the stars pull your gaze to deeper understanding of the
> world we
> live in.
>                                               Russ Jocoy
>
>          PS   sorry I got a little deep there...
>
> ("atm{at}shore.net")
>
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