Dip Pens are not cartridge fed like fineliners and brush pens. As a substitute, you dip them into a bottle of ink and re-dip when the ink runs out. This method is much more akin to the kinds of pen and ink drawing finished by artists of your past. https://rowanfufrb.blogdal.com/36155827/new-step-by-step-map-for-ink-drawing-for-beginners