the first question is Why?... what's the point of going thru the trouble and expense of making a quilt top (an exacting and costly hobby), and then putting something inside it that will dissolve in water and leave an inky mess behind? go get a newspaper and put it in your kitchen sink and soak it, scrubbing and 'washing' it.... see if it looks like that belongs inside a quilt? And then if you get that far, look at the water left behind...do you want that in your quilt?