Dip Pens are usually not cartridge fed like fineliners and brush pens. Instead, you dip them into a bottle of ink and re-dip after the ink operates out. This system is much more akin to the types of pen and ink drawing carried out by artists on the earlier. https://howtodrawwithinkpens98765.weblogco.com/35791995/the-2-minute-rule-for-how-to-draw-with-ink-pens