From: "Russell Jocoy" 
To: scottythefiddler{at}cogeco.ca, bobmay{at}nethere.com, atm{at}shore.net
Reply-To: "Russell Jocoy" 


>From: "scottythefiddler" 
>Reply-To: "scottythefiddler" 
>To: "Russell Jocoy" ,
>,
>Subject: Re: ATM tool for pitch lap...
>Date: Sat, 8 Mar 2003 21:54:00 -0500
>
>
>Out of curiousity, has anyone ever tried a sand and cement tool?    The
>dental stone is nice because the grain size is very small, and much less
>likely to cause bad scratches if any of it gets onto the mirror.  Another
>nice thing about dental stone, is that it is soft enough to carve with a
>knife.  I like cutting little chamfers on the back to ease the sharp edge.
>A concrete tool, with fine sand as an agregate it going to be very
>inexpensive, very stiff, and quite useful, if it can be sealed to contain
>any loose particles.  The 40 lb. sacks of premixed concrete that are so
>common at the lumberyards have a plasticizer in it, as well as a bonding
>agent.  Dental plaster is designed to release from the mold, and bonding to
>other items is not its' strong point.
>
>Concrete isn't exactly lightweight, but it is lighter than glass.   If I am
>not mistaken, a cubic foot of concrete weighs about 100 lbs, a cubic foot
>of
>water weighs 75 lbs, and a cubic foot of glass weighs about 350 lbs.   I'm
>not positive that I have these weights correct, so please feel free to
>provide better info.
>
>I have never tried a cement tool, but my curiousity is up.   Has anybody
>tried?   What size, how thick, and did you have any problems with it?
>
>
>
>----- Original Message -----
>From: "Russell Jocoy" 
>To: ; 
>Sent: Saturday, March 08, 2003 7:36 PM
>Subject: Re: ATM tool for pitch lap...
>
>
>
>
> >    Bob,  I agree dental stone is some really hard stuff. Harder than any
> > cement based mixture that I
> > have worked with. There is no wonder why they have the name
"stone" in
>it's
> > description. When I
> > first priced this product I felt it was over priced, but after using it
>I
> > was amazed......
> >                                       RUSS JOCOY
> > ("atm{at}shore.net")
> >
> > _________________________________________________________________
> > ("atm{at}shore.net")

                You can use other aggergates to mix with portland cement,
they can be vey tiny and
powdery. You can eliminate the scratch posibilities , but the tool must be
sealed. The problem
comes when you try to seal the face of the tool. If you epoxy your tiles on
the face there is no problem,
but you will be steady sealing the back. I have used Hydrualic cement which
sets like dental stone.
Hyrdualic cement is a fine powder also but the label suggests that it not
be used with prolonged
contact with water. I have not tested if that is true.

RUSS
  ("atm{at}shore.net")
>
>
>


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