From: John Murray 
To: atmlist 
Reply-To: John Murray 


G'day Bob,
        When I was making my dental stone tile tools, I was suffering the
sudden
rush to finish due to the stone suddenly thickening. As I show on the web
site in my sig, by putting the mould for the tool onto my orbital sander
and glueing the tiles into position I was able to completely fill the mould
with no voids or bubbles. If the stone needed touching up and it had
thickened to the point of being unworkable, a quick blast of the orbital
motion liquefied it again and you could continue again. Hope this helps.

Cheers

John Murray
Whyalla
South Australia
Check our web page at http://astronomy.sa86net.com ATM and M-O-M stuff.
Latest Ronchigrams only at http://www.users.bigpond.com/imasloth/


> -----Original Message-----
> From: owner-atm{at}shore.net [mailto:owner-atm{at}shore.net]On Behalf Of Bob
> May
> Sent: Thursday, 14 August 2003 2:48 AM
> To: atmlist
> Subject: Re: ATM Tile tool questions
>
>
>
> Yep, plaster does go off a lot faster than most realize the first time
> around.  I've just put a warning on my plaster tool article so that those
> that foloow my page will, at the least, have heard that the stuff is fast
> setting.
> It acts smooth and soft for a while and then it suddenly starts to be
> thicker and that is when you have about 10 seconds to finish up, if even
> that long.
> I'll note tho that first timers often also feel that their work isn't good
> and often may throw away a tool that is more than good enough or
> can be made
> so with just a little repiar.  Bad castings can also be used as
> the backing
> for a good tool if you rough up the face of the old casting a little.
> Bob May
> http://nav.to/bobmay
> bobmay{at}nethere.com
> NEW! http://bobmay.astronomy.net
>
>
>

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