I started by sampling on different fabrics - did each colour on a cotton and a silk.
Wendy Klotz demonstrating the proper gear for mixing Procion powders in a dust box.
First layers onto three pieces of paper. One in yellows, one in pinks, one in blues.
I flipped each over so they would be two-sided. On each sheet I would use up to three different shades of that particular colour.
One month of painting later - probably 30 layers on each of the six sides.