Gurney Journey: Sepia Wash Drawing. This white china cup is an ideal subject because its faceted sides make the stepwise transitions from light to shadow abundantly clear. All these steps can be carefully modulated with the washes, and the process is immensely faster than charcoal. Plus the tones are smoother and purer. But it takes practice to do such an accomplished study, since you have to lay down the tone and leave it: you can't scrub on it or tweak it forever.