Check out this video–I am thrilled with it.
http://www.knittingdaily.com/blogs/daily/archive/2011/03/04/what-is-energized-yarn.aspx Click on “What is energized yarn?” and scroll down to the You Tube video.
I loved working with Kathryn Alexander and in this video she tells about working with me. The thread she spun for me that she talks about was really fine and fragile. She was sure that I couldn’t weave with it and that I would be mad at her. But I did–warping “back-to-front”, of course. I wanted to test my warping process with the most fragile thread I could find, so that’s why I asked her to spin some for me.

She calls the yarns “energized” I call them overtwisted. These yarns are what I’ve used for collapse weaving where the cloth puckers. Search for “Pink Creature” to read my post about it. This is one of my favorite collapse pieces. There is also a picture in the post of the cloth after woven but before washing.
http://www.knittingdaily.com/blogs/daily/archive/2011/03/04/what-is-energized-yarn.aspx