Attempt mixing up various techniques that can help determine the form of the article you might be sketching. Cross hatching and contour are commonly used collectively. Hatching is the best and one of the most fundamental ink drawing techniques. To hatch you basically produce a series of horizontal parallel lines. https://how-to-draw-with-ink-pens17531.techionblog.com/35978561/the-2-minute-rule-for-how-to-draw-with-ink-pens