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Whats the best way to mix greensand? Answered

I'm looking to start aluminum casting, and I'd like to try sand casting. I'm on a TIGHT budget, so I need something for about twenty bucks. What the best formula for greensand?

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Burf

Best Answer 7 years ago

I love this guy's site, I've picked up some nice DIY tips here;

Greensand Casting

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FrankD53

2 years ago

The Gizmology site is a good resource. Basically 9 parts fine sand (silica sand), 1 part bentonite clay, 3% water by weight.

Ceramic supply stores or Clay supply stores have both on hand. I paid $27 for 50 lbs of silica sand and 10 lbs of bentonite.

Happy casting!

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TimothyM3

3 years ago

Then let the water dry off in the sun?

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TimothyM3

3 years ago

new to the greensand casting and having same problems everyone else has tracking down clay. I was wondering if anyone has ever tried to make bentone clay from bentonite clay at home for oil bonded greensand recipe. I was thinking maybe some dawn soap, water and two stroke motor oil. Just a wild idea to use what is available to me. I have experience with wax casting crown n bridge but none of this

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kelseymh

7 years ago

If you make your own (see Burf's reply for Best Answer!) please wear a dust mask. Inhaled bentonite powder can cause silicosis and other "delayed respiratory diseases." Here's the MSDS.

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rickharris

7 years ago

There are lots of formulae on the web. Bentonite is often used in Kitty litter so can be obtained quite cheaply that way.