When I see Frances Richardson's drawing I think it is visible and invisible. She's not like the other artist just use a pen to line everything. She cares about the details. Richardson feels, and notes that the sculptures on which she is working are to her a form of three-dimensional drawing. She speaks of the vital significance of tiny differences in character of paper and in the graphite-strength of pencil, emphasising the physicality of drawing.
She didn't use any color on her drawing in addition to use tiny little symbol to line up a shape. In this drawing she was drew like a spider because it seems like many legs on different directions from deep to shallow. Although there are no other medias she uses to draw, she needs to very careful about which situation should draw darker or slight that makes the drawing look three-dimensional.