I recently hand washed all of my batiks - over 200 pieces - from fat quarters to yardages - MOST of the brighter, darker colors bled - not so much the lighter, pale colors. I gently swished them in a pure white dish pan and then gently wrung them out - then smoothed them out onto big thirsty towels and rolled them up - let them sit awhile - then hung them over clothes lines that I had my DH to put up in my living room. They did not take too long to dry that way and was relatively smooth when dry. Very little if any fraying on the edges. Don't know about jelly rolls - but I would think that some sort of washing would be necessary due to all of the bleeding that mine did.