My materials vary, my default being Dip Pen and Indian Ink (Winsor Newton). Indian ink is waterproof, and the dip pen gives a wonderful variety of marks that gives a drawing a sense of depth, depending on the amount of pressure put on the nib. One is able to then add washes (ink or watercolour) without the line bleeding. (Though that can also be manipulated to create great tones)
|Study of detail on a church wall using indian ink and dip pen with Lamp Black watercolour wash.|
The above drawings were made pretty fast as they involved people who were moving, or I was in a rush. I usually find this a good way to draw because it gives no time to be fussy.