Re: [ATM] start...tool....

["Richard Ozer" <rozer@pacbell.net>]

I use plaster of paris all the time... However it must be sealed with epoxy.
The general approach is to make a plaster of paris disk, let it completely
dry for a week out in the sun, coat the entire thing in fast drying (5:1)
epoxy.. use twice as much hardener as recommended.  After the epoxy has
dried, pour more epoxy on one side of the tool, lay the tiles on top,
pour/brush more epoxy on top of the tiles thereby filling in the gaps and
creating a solid bond between the tiles and tool.  The epoxy also serves as
an indicator of how well your tool is making contact with the glass once
you've started grinding.  Once all the epoxy is ground off of the surface of
the tiles, you know you have good contact between mirror and tool.

RO


----- Original Message ----- 
From: "Saqib Sajjad" <saqibsajjad@yahoo.com>
To: <atm@atmlist.net>
Sent: Sunday, April 09, 2006 6:05 AM
Subject: [ATM] start...tool....


> Hi,
>
>
>
> mahmood gave me my share of care package items today. my thanks
> to atm list participants who donated items for the care package.
> i have started reading the books. i will start grinding from
> next week after making the tool. as i dont have a mentor so
> i will need guidance from everyone on the list.
>
> first...i am thinking of making the tool with plaster of paris.
> is it ok? is there any better choice? any suggestions?
>
> Saqib
>
>
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