Hatching is the simplest and one of the most fundamental ink drawing techniques. To hatch you in essence produce a number of horizontal parallel traces. You need to use a ruler to receive sharp straight lines for an architectural look but freehand traces will give your drawings more character. https://cristianrlvdk.thezenweb.com/how-how-to-draw-with-ink-pens-can-save-you-time-stress-and-money-75169135