I have just such a fabric that, in theory, is perfect for the quilt I'm using it in. But it frays up to 1/4 of an inch while I'm sewing. Good bye, seam allowance.
I took the cut pieces and smoothed (with thumb and pointer finger) some slightly diluted elmers liquid glue on the cut edges. I haven't had the heart to go back to working on the quilt since then, so i don't know how it will work. Please note that the slightly watered down liquid glue did make the edges wavy, but wavy is better than 1/4 inch gone!
good luck!