Well, it seemed like a good idea at the time. I have a Nosegay 1930's quilt that I decided I needed to soak and clean. It had some stains on the back that I wanted to see if I could get rid of or lighten. Put it in the washer and let it soak for most of the day. When I took it out it had some bright yellow squares on the back. They weren't there before. One of the boquets had an orange fabric in it as part of the flowers. (squares to form the boquet). The orange had bled through to the back. I was sick. It may now be worse that before but at least it is not dingy looking. Evidently it had never been washed. It is still a beautiful quilt. Hand pieced and nice hand quilting.
Question: Is there anything I can do about the yellow on the back?