From: "Russell Jocoy" 
To: twentiethwave{at}hotmail.com, atm{at}shore.net
Reply-To: "Russell Jocoy" 






>From: "Bill T." 
>Reply-To: "Bill T." 
>To: atm{at}shore.net
>Subject: Re: ATM tool for pitch lap...
>Date: Thu, 06 Mar 2003 18:33:41 -0700
>
>
>Preparation is all it takes to successfully use fast setting plasters.
>
>Have the plaster and water pre measured.  There's no time for measuring
>once the mix is wet.
>
>Have a strong stick with a square cross section within easy reach.  The
>square corners are useful for scraping powder stuck to the sides of the
>mixing vessel back into the mix.
>
>Use an electric drill with a mixing attachment for most of the mixing.  The
>tool can be a 2" bent washer bolted onto the end of the some all-thread.
>For ~$15 you can buy a good professional plaster mixing tool from a
>ceramics supplier.  Mix at about 1000 RPM until the mixture is very creamy,
>which takes about 3 minutes.  It's very difficult to get a really good mix
>by hand, especially when dealing with more than about a quart.  The quality
>of the mix has a lot to do with tool longevity.
>
>Have a clock with a second hand in view.  It's not difficult to go from dry
>mix to pouring in 4 minutes - but only if mixing is all you have to do!
>Use the clock to give yourself the maximum possible mixing time, without
>going overtime or cutting it needlessly short.
>
>Also, have a few wet and dry paper towels in easy reach.
>
>But once you've started, if you have to go looking for something, or
>measuring something, or clearing space for something, or reading something,
>etc. it's all over.
>
>Bill T.
>
>
>
>
>
>
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("atm{at}shore.net")

    Bill I agree totally, If anyone has worked with BONDO filling dents on
autos that you wish you had now,
this rapid working time is well known. Remember that this rapid setting
time is in your favor if you are
prepared, if not don't use it. Fast set hydraulic cement goes fast too but
not as fast as dental stone.
The problem with the fast set concrete is that is suggests that constant
water contact will degrade the
stability of the cast over a period of time. Dental stone is the
"Bomb" and if used correctly if some
fantastic mud, for about 3 minutes...       RUSS JOCOY
("atm{at}shore.net")

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