To: atm{at}shore.net
From: Charles Mitchard 
Reply-To: Charles Mitchard 


Dont know about Gugolz as I use a mix of rosin, wood flour and caster oil
(tropic lap) but my lap popped off after 2 hours in the fridge. Considering
the mirror has a 5" chunk missing from the face and had been sitting
in the car for 3 days with the tool on top and was well and truly
"formed" into every nook and cranny I was very surprised Charles


>This message is to all grinders and experienced types to reveal the
>secret to separating a plate glass mirror partially stuck to a Gugolz No.
>73 Pitch lap on a concrete base! By partially I mean I did what probably
>many first timers did. Did not press mirror on tool soon enough to
>achieve complete contact with soft pitch after pouring onto concrete
>base. AH HA! I know what to do! Great idea! Proceed to put cerium oxide
>slurry and soap on mirror (mirror not stuck yet) and put on misshapen
>pitch lap in car on hot day! That way hear of sun and inside car will
>soften pitch and weight of mirror on pitch will allow pitch to gradually
>conform to curve of mirror! (Now mirror stuck) Only problem is it took
>over and hour and still did not get to shape of curve. Oops. So now after
>grinding for two years, I have a very nice plate grass f4.1, 16" dimater
>mirror attached to a concrete base pitch lap (about 40% contact) and
>pondering my chances of  ever realizing its completion. Any ideas?
>
>Rob in Ramona

I just got lost in thought. It was unfamiliar territory.

--- BBBS/NT v4.00 MP