The Chocolate Life

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Comment by Clay Gordon on December 13, 2012 at 1:41pm

The video shows how screen can be used as a pre-classification system. By getting all the pieces roughly the same size, you can adjust the airflow and make the separation more precise. 

You can make your own, as shown in the video, but you might want to take a look at this set of sieves made for gold panning that fit on top of a 5-gallon bucket. The smallest sizes are way too small for winnowing (but may have other uses around the workshop) but the larger ones are perfect for pre-classifying.

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