To use a traditional quill knife, while cutting the flat surface of the blade should face you and the rounded surface of the blade should face the quill. This helps facilitate the rounded cut of the nib shape and why a traditional knife is far superior to a utility or hobby knife.
This is a RH version of my quill knives. You will use this version if....
If you cut them in the opposite direction you will need my Quill Knife, LH version