I purchased Kona cotton today and when I was having it cut I was told it was "prepared to dye". I bought it for it's creamy color and am planning on using it in a baby quilt--not to dye it. Now I'm wondering if when washed it will pick up the "free dye" from any colors that will be in the quilt. Also is the shrinkage any different from colored Kona cotton? Is the PTD and regular Kona interchangeable? Thanks for any help.