I'm making the "Square in a Square" pattern using batiks and solid white fabrics. It will be used on a twin bed. The pattern calls for a charm pack, a jelly roll, and a honey bun. I'm going to substitute white yardage for the honey bun and plan to wash it before piecing it. I won't pre-wash the precuts. However, I'm concerned that the batiks will bleed onto the white yardage once it is washed. This is the first time I'm using batiks. I was thinking of using color catchers the first time I wash it, but have never used them before. How many should I use? Should color catchers be used with the first few washes? Has anyone used color catchers and still had bleeding? Any other suggestions?