Dip Pens are not cartridge fed like fineliners and brush pens. As an alternative, you dip them into a bottle of ink and re-dip when the ink operates out. This technique is more akin to the types of pen and ink drawing carried out by artists from the earlier. https://inkdrawingforbeginners65432.arwebo.com/58097634/the-5-second-trick-for-how-to-draw-with-ink-pens