i agree that trying to print on it would be a waste of time. but if there's a way to wash it out easily, i like the idea of using it as a stiffener.
i suspect the only way to get it out is to boil it out, as in batik dying. but i live in hope ... LOL
hmmmm ... i wonder ... if you didn't wash it out at all, would it make it more dust and stain resistant? could be a great thing for quilts meant to hang on walls.