Re: Aluminium casting Newbie

I think also known as kieselgur and diatomatious earth. A component of dynamite used to hold the nitro glycerin.

Roy wrote:

Cool I learned something today, fullers earth is bentonite clay....
You owuld be surprised what it is used in. Its used in feeds,
cosmetics, soaps, paints, and many many other items. Look for a mesh
size of 200 to 240 for "fullers earth" and a mesh size of 80 to 100
for the sand itself. regular playsand or Silica sand will work for
what your doing, although its not the best choice, but its still
doable. MIx the dry ingredieints thouroughly.......(the easy part)
then add the water a little at a time.....so that it gets to a
consistency of..putty. YOu know you have it about right when you can
take a handfull and squeeze it in the hand and form a fistfull that is
all bonded toghter. THen take that formed wad of greensand and place
it in your hand palm side up, and let it span across your ing and
index finger. Apply pressure to the piece with your thumb, and it
should break cleanly in half. YOur hand shoul dbe relatively free of
the greensand and yur hand should not have any traces of water on it.

If its too wet it makes steam when its poured and will ruin the
casting. Too dry and it will not ram up tight or have sufficient
strength. If its too wet, just spread it out on the floor or in a tub
and allow to dry a bit, and remix. Greensand thats used can be added
to unused sand and remixed/ retempered to proper consistency. ONce it
no longer retempers and retains its green strength its time to add
more fullers earth or toss it all and start again. The more its used
up to a certain point the better it works, so the darker and more
brown/ black it becomes the better is works.

Have fun


On 6 Feb 2006 07:18:28 -0800, "ronpriest" <ronpriest@xxxxxxxxxxx>
wrote:

<>Well From what i can gather so far from the net bentonite is fullers
<>earth and is the chief constituent in cat litter and speedi dry
<>(industrial absorbent).
<>I assume fine sand ie silver sand or childs playsand as we call it in
<>this country can be mixed with crushed cat litter and a little water
<>to make a form of casting sand.
<>I wander how many Females realize that fullers earth (used as a
<>cleansing cream by women worldwide) is really crushed Kats litter ! The
<>mind boggles



.

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