Re: [ATM] Tool Tiles

["Bob May" <rmay@nethere.com>]

OVERKILL!!!!  The tool will be more than strong enough to do the
job all by itself.  I use dental stone of medium strength and
start grinding again about a half hour after I start mixing the
stuff.
As to what works, any of the plasters/stones work well.  The
cements also work well.
What doesn't work well is Plaster of Paris (it's water soluble!)
as you have to seal the surface which means you can't bury the
tiles in the plaster, centents with sand in them as the sand will
erode and provide nice large pieces of grit to keep you from ever
finishing the mirror.  The long setting stuff is also a problem
unless you plan on taking a few days off while the dang stuff
sets up.
Others have mentioned brand names of the various stuff and it all
works well.  Fast setting times are a nicety as you can quickly
get back to work on the glass.  Don't worry about getting the
tool dry as you're just going to be wetting it again to do the
grinding.  The tool needs to be wet or it will suck up the water
in with the grit and you'll be adding water for a while until the
tool is happy with the water it has.
Bob May

rmay at nethere.com
http: slash /nav.to slash bobmay
http: slash /bobmay dot astronomy.net

----- Original Message -----
From: Bill Wheaton <junkwheaton@gmail.com>
To: Mark Holm <markholm@verizon.net>
Cc: ATM list <atm@atmlist.net>
Sent: Saturday, May 17, 2008 10:21 AM
Subject: Re: [ATM] Tool Tiles


> >What you describe sounds like floor tile.
> Thanks Mark-
> That's kinda what I was thinking.  Any harder and it would be,
well...
> glass!
>
> And thanks for the link to USG.
>
> To get it good and set into the tile spaces, I'm thinking of
making a little
> vibration table from plywood stock and make sure it's level.
I'll put my
> mirror/tile/dam assembly on it and then pour the mixture.
Then, I'll use my
> drill to power an eccentric wheel against the base.  If all
goes well, and
> there are any air pockets/bubbles in the mixture, they should
start floating
> to the surface.  Also, it should make the whole thing be level
and even in
> thickness.  I'll take pictures just in case it works out :)
>
> To make it stronger, I was going to put some galvenized metal
mesh screen in
> it too about half way down.
>
> Is that overkill?
>
> -Bill
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> ATM mailing list http://www.atmlist.net/
>

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