This document provides guidance on using ink washes to add tones and shadows to drawings. It explains that tones should be added convincingly based on two-point perspective, with sides of forms facing the same direction shaded similarly. Dark shadows help create convincing space by following the same vanishing point as the object casting it. Different techniques for applying ink washes are demonstrated to create blended washes with tight or loose value contrasts, effects from wet ink on wet paper, contrasts from wet washes hitting dry spots, and textured effects from adding salt.