Re: [ATM] Material for Tool

["Bill Wheaton" <junkwheaton@gmail.com>]

>The cure is your local neighborhood cement driveway or sidewalk.
Ingenious!

On Sat, May 17, 2008 at 11:46 PM, Mark Holm <markholm@verizon.net> wrote:

> Bill Wheaton wrote:
> >  I can wait for it to dry though.
>
>
> Their point is that you don't have to wait for it to dry.  The stuff cures
> wet and has enough of it's final strength in an hour or less, that you can
> go ahead and use it.  Drying isn't needed unless you are doing the epoxy
> thing.  Having done the tile in stone method, I don't think I'd ever do
> epoxy.  The tile in stone is just too easy!
>
> HydroStone is essentially the same as dental stone in terms of strength, is
> intended for applications that get wet and is available anywhere in the U.S.
> (probably Canada too)
>
> You can get dental stone from www.gotgrit.com.  Tile too.  There is also a
> tile in stone tutorial with pictures.  Worth checking out.  One thing to
> know is that the plaster/stone may not end up very flat on the back.  This
> is especially true if you keep your mixture stiff, as you are supposed to
> for optimal strength. The cure is your local neighborhood cement driveway or
> sidewalk.  Think of it as a large flat grindstone.  In the first hour after
> mixing, you can easily flatten the back of a tool by grinding on a coarse
> finish concrete surface.  You can bevel the back edge while you are at it.
>  A beveled edge is nicer to handle and (as we all know) harder to chip.
>
> If your tiles don't appear to be sufficiently embedded after casting, or
> there are holes that look like grit traps, mix up a bit more stone/plaster
> to a little thinner consistancy, smear it over the face of the tool and
> sponge off the excess.
>
> I have to tell you that after making a tile in stone tool, I was almost
> laughing out loud at how easy it was.  Too bad we can't make mirror blanks
> so easily!
>
> Since casting plaster from the local big box store works for Mel, I am
> certainly not going to suggest you really need anything fancier.  I'm saying
> that the same set of techniques work for dental stone, hydroStone, HydroCal
> and whatever casting plaster Mel uses.
>
>
> Mark Holm
> markholm@verizon.net
>
>
>
_______________________________________________
ATM mailing list http://www.atmlist.net/