I looked at the website; this is fine art printing on cotton sateen fabric. I think if there were a way to make these prints absolutely permanent, they would have either done it already or provided directions for doing it. Since these are sold for making quilts, my bet is that they will fade a little with washing but not disastrously. You would still want to wash these quilts with much more care than usual -- sticking to cold water, ph-neutral detergent, and air drying. I would also be careful not to subject them to a lot of agitation. Hand agitating in a top-loading washer is easier on quilts than letting them go through the agitation cycles (or even tumbling in a front loader).