Re: ATM Melting pitch

["c f" <quantemlp@hotmail.com>]

Hello to all,
I have heard different opions on pitch, melting and so forth, but very few 
on the process of applying it onto the tool, cutting lines and then pressing 
the mirror.

I have read one place, that says to melt the pitch, put up a dam, apply the 
pitch, apply a plastic grating over it to cut the lines, and then apply some 
cer slurry,, and last apply the mirror and press down getting a fit, and 
then start to polish so you get good contact,,

a second does basicly the same, but says to use a soldering iron to cut the 
lines after the pitch cools,

now my question is,
a) which one is better, or is there a better process for forming the pitch 
to the mirror and cutting the lines?
b) wont the pitch stick to the mirror if it is hot and you push your mirror 
onto it?

I will be making my hydrostone tool and lap this weekend, outside in the 
tool shop, just to keep maritial sanity stable. OHHH I did my grinding last 
night to 9 micro,  not a scratch, blemish, pit or anything :) :) :)  it 
looks awsome  (www.geocities.com/quantemlp)

thanks to all for the wonderful support

>X-OriginalArrivalTime: 20 Jan 2004 19:16:13.0741 (UTC) 
>FILETIME=[DEC40DD0:01C3DF89]
>
>I don't use dams at all with my pitch pouring as the pitch never gets hot
>enough to flow fast anywhere.  I just watch the melting (even playing with
>the cold spots to get them to heat faster) and when the pitch is starting 
>to
>melt, it is time for the mold and warmed mirror to go on the top of the lap
>in progress.
>At 200F, even putting the pitch into water will allow the pitch to get hot
>enough for the job.
>Bob May
>http://nav.to/bobmay
>bobmay@nethere.com
>NEW! http://bobmay.astronomy.net
>
>
>

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