Shading with pen and ink

About pen and ink strokes PEN & INK STROKES Contour Lines: Contour lines are marks that precisely follow the curves and planes of an object. Parallel Lines: Parallel lines are straight marks that extend in the same direction. Sketched free-hand, the lines need not have ruler straight perfection. Crosshatching: Crosshatching consists of two or more sets of contour or parallel lines that are stroked in different directions and intersect. Stippling: Stippling is a grouping of dots. Scribble: A scribble line is a free flowing (but controlled) mark that loops and twists in a sketchy manner. Wavy Lines: Wavy lines are drawn side by side in a repetitive pattern Crisscross Lines: Crisscross lines flow with the contour of an object and are arranged in a staggered, randomly crossing manner.