Batiks are just hand-dyed cottons. Batik is only a coloration technique, nothing more. Sometimes they are over heavily dyed, which can cause color to run. I highly recommend using color catchers in at least the first few washes after the quilt is finished. The only other thing I recommend is pre-washing any other fabrics you will use with the batiks as your batiks have been pre-shrunk but the other cotton fabrics are not.