Dye catcher....avoid disaster

This is why I always wash fabric before using in a quilt or quilted project.  I had a stack of fat quarters....blues, a couple of greens, a black, and some purples...that needed to be washed.  I threw a white dye catcher sheet into each load.  And this is what I got back.... Excess dye that I do not want to bleed onto the backing or of other fabrics in the project. 
Better safe than sorry.
Happy stitching.