Great fabrics , can't wait to see the quilt.
Do pre wash your batiks in warm water till they stop running. Rinse with cold water. Dry them , and starch. You can use a spray or a concentrate diluted. If you use the concetrate ( dilute to about 4 parts water to 1 part starch) you can dip or soak them, hang dry then iron. You can also spray on the ditluted concetrate but when I have a bit to do its just as easy to dip them.