When I wash fabric yardage, I serge the cut ends of the fabric to prevent the raveling, and avoid tangled knots in the washing machine. My machine is an old Sears Kenmore machine and has worked well for many years. If you serge the raw endges of your fabric yardage, you shouldn't have problems with raveling. I don't buy pre-cuts or quilt kits at all and, thus, I don't work on those --I can only imagine the difficulty anyone would have trying to wash pre-cuts and kitd. I just don't buy those items because I'm left in the lurch with the raveling and the shrinkage, and I don't want to deal with that problem.