I recently spent some time playing with a new product - Decolorant. It's a citrus smelling, thick product that decolours fabric without using bleach. It can be applied with a rubber stamp, paint brush, etc. After it dries, you heat it with an iron and the color disappears. Interesting product.
This Art + Quilt exercise asks for 6 inch "solid" fabrics for background with 3 inch "solid" fabrics for the centers. I gleaned these fabrics from my hand dyed fabric box. Some were already 6 inches that I purchased long ago while others were ones I hand painted using Setacolor.