Re: ATM Plaster of Paris Tool question

["Sam Michael" <samm@idcomm.com>]

Roughing the surface "between pours" will increase electrostatic bonding,
but there is no bond outside of that .  They are in essense two pieces.  Not
a good idea.

With concrete (which is similar).  The only way to connect a second "pour"
is by use of anchor bolts which are inserted after drilling the concrete and
set with epoxy.  The new concrete sets around the anchor bolts and this
holds the two pours together.

This is a "curing" process.

Make a new tool.  You cannot add more POP at a later time.

Sam.


----- Original Message -----
From: Joseph Goins <jb_goins@yahoo.com>
To: Daniel Fundo <fundo@bellsouth.net>
Cc: <atm@shore.net>
Sent: Friday, January 04, 2002 9:49 AM
Subject: Re: ATM Plaster of Paris Tool question


>
> Daniel,
>   Do you know how long real plaster should dry for before sealing?
> Joe
> --- Daniel Fundo <fundo@bellsouth.net> wrote:
> > << I finally got down and cast my POP tool for my 12" blank.  I used
> > at
> > least 4 lbs of POP (it's what I had on hand) but the thickness is
> > only
> > about 1.5".  Is this thick enough?  Can I add more pop at a later
> > time?
> > >>
> >
> > Joe,  I made a 12" diameter dental plaster tool 20+ years ago that
> > was
> > only 1.25" thick.  It has worked well through three mirror
> > grindings/regrinding.  I'm not sure about adding extra thickness
> > later.
> > With most plaster or portland cement, you need to rough up the
> > surface
> > quite a bit to get good adhesion between pours.
> >
> > *****-----
> > Dan F.
> > Secretary/MAS
> > Memphis, TN
> >
>
>
> =====
> Joseph Goins
> 1091 Harness Cir #1
> San Ramon, CA
> (925) 277-1351
>
> http://www.geocities.com/jb_goins/
>
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