If you are at all serious about testing glazes and clay bodies, you need one of these. There are other methods, but nothing else comes close to this. It is the most valuable and frequently used tool in any ceramic bodies and glazes testing lab or classroom. These are expensive new, this Lightnin 1/20 hp variable speed cost more than $1000 many years ago, now it could be $4000! But you can get them used on ebay.com. I adapted a mount (to give it vertical adjustment) from a hardware store. Propellers are also expensive, but you can design and 3D print them yourself or have them printed at a place like shapeways.com.
Pages that reference this post in the Digitalfire Reference Database:
Understanding the Deflocculation Process in Slip Casting, Testing your own native clays is easier that you might think, Home-made propeller mixer with mount and switch, Printing a prototype propeller for my Lightnin lab mixer, Engobe, Propeller Mixer, Blunging, mixing
This post is one of thousands found in the Digitalfire Reference Database. Most are part of a timeline maintained by Tony Hansen. You can search that timeline on the home page of digitalfire.com.