This weekend I chose to play around just a bit with both carding and fulling on extra fabric I had that I wove and the chaff that is left in the combs from the combing process.
I also took a length of cloth that I have woven on a rigid heddle loom out of leftover rug yarn and decided to full it in the washing machine just to see how it would come out. It shrank over three inches in length, but the wool became exceptionally soft given that it was rug wool. I thought it would compact more, and still be coarse and I had planned for using this as a rug, but now I think I might turn it into a warm hood (lined with linen) for winter camping if there is enough fabric.
For those unfamiliar with the process, fulling wool takes a finished piece of weaving and with hot water and agitation (and often use of detergent, urine or a mineral called Fullers Earth) it locks the wool fibers together, closes the gaps in the weaving and gives the resulting textile a better ability to shed water and insulate against the cold. I merely tossed mine in the washing machine with hot water on the heavy cycle and then dried it in the dryer. Historically the early Norse wove fine dense fabrics, with combed rather than carded fibers, and did not need to finish cloth in this manner before use.