I just came from another thread where she hadn't prewashed and the batiks bled into her background fabric :cry: I ALWAYS prewash with a scrap of white cotton to see if there's any bleeding. The only exception, like a previous poster said is fabric for kaleidoscope quilts. :D I'd rather invest that little bit of time and effort than risk ruining hours of work. Plus I kind of enjoy the process of washing and pressing as 'welcoming' new fabrics to my stash. But perhaps I'm a bit weird! :lol: