I have used the pre treated fabric sheets, which have turned out fine, but I'm not sure if my mother in law has washed it yet. (it has been around 2 1/2 years since I made it)
Whatever you do,
don't use the iron on type of thing, they just seem to peel off.
This post has some good information
http://www.quiltingboard.com/links-r...e-t197055.html