Produce a slit in to the feather within the tip on that flat close. This slit will go up in to the hollow part of the feather about ¼ inch. Later on this slit will draw up and hold some ink when dipped. The paint settles in these grooves https://quillpenarttutorial65401.thelateblog.com/34746882/helping-the-others-realize-the-advantages-of-how-to-draw-a-quill-pen-with-ink