This Infinity pencil is supposed to last a long time. Is it compressed graphite, a mix with some type of metal? I don’t really know. It writes like a very light H pencil on regular paper, but it does a fantastic job on stone paper, which makes me think there’s metal in the nib. I drew these birds with this one pencil, and it shows the variety of tones I can get on this Etched paper, which now comes in single sheets.