Hatching for Thickness: By hatching (drawing closely spaced parallel lines) in specific locations, you'll be able to develop the illusion of the thicker line and incorporate texture on your drawing. Scribble Drawing: Come up with a loose scribble drawing, focusing on different the pressure as you move your pen. https://jeffreyocpak.thenerdsblog.com/41966783/top-guidelines-of-how-to-draw-with-ink-pens