Be aware: In order for you the surfaces to look flat, consider to maintain a similar length between the parallel lines (see 1st example). You should use other speciality pens, like calligraphy pens, for line drawing. These types of pens have specially built nibs generally used for hand lettering https://ink-drawing-for-beginners44320.jaiblogs.com/61707972/not-known-factual-statements-about-how-to-draw-with-ink-pens