This is 1100cc of water and 3000 grams of M370-2 casting. Amazingly, it is possible to get all that powder into that little bit of water. And still fit in the container (2250cc) and still produce a very fluid slurry for casting. How is this possible? That water has 11 grams of Darvan 7 deflocculant in it, it causes the clay particles to repel each other such that you can make a liquid with only a little more water than is in a throwing clay! This is a test mix of M370-2 casting (it uses a large-particle kaolin), my pieces cast in 7 minutes (less than half the normal time). Using a good propeller mixer (in a bigger container of course) the slurry can be mixed silky smooth in a couple of minutes.
Deflocculants: A Detailed Overview
A detailed look and what deflocculation is, what the most common types of deflocculants are (there are many) and how they compare in function
Understanding the Deflocculation Process in Slip Casting
Understanding the magic of deflocculation and how to measure specific gravity and viscosity, and how to interpret the results of these tests to adjust the slip, these are the key to controlling a casting process.
The deflocculation process is the magic behind the ceramic casting process. It enables you to make a slurry of far lower water content and thus lower shrinkage.
A method of forming ceramics where a deflocculated (low water content) slurry is poured into absorbent plaster molds, forming a layer against mold walls, then poured out.
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