Just posted about this in another thread. Let me start by saying that I always wash a quilt prior to gifting. I followed that process with one quilt I had used a (prewashed) fabric for backing. It still ran. Washed numerous times w/color catchers and it still ran. Finally ended up gifting the quilt with a box of color catchers and told them to NEVER wash that quilt without them! Felt horrible having to do that but also didn't want them to freak out after the first wash to find the beige background fabric pale green after a wash.