I am in the middle of doing this! My friend asked me to make a sunbonnet sue with white background squares....red dress and black hat and shoes.....Red flannel for the back. I washed the red flannel (7 yards) in cold water and used 3 color catchers....the 3 color catchers were bright pink almost red....so I washed again with 3 more color catchers...this time a lighter shade of pink.....I then dried the fabric. The red cotton fabric (4 yards) for the dresses...did the same.....I am very concerned about this fabric as I just know it will ruin the white back ground the first time it is washed as a quilt. The fabric is moda....I haven't cut the fabric as I am worried...I have a call into the quilt store where she bought the fabric...haven't heard back from them. both selvedge edges which are white are now a light shade of pink.