Besides the good old hobby knife, there are cut paper artists using scalpel. I had not cut with scalpel before but am cutting a new piece with it now. Someone sent me the surgical scalpel with Zirconium Nitride coating on the #11 blade, the same coating that makes the blade sharper and stays sharp longer.
After cutting with it for a couple of hours last night, it felt extremely sharp I must say and I have not switched to a new blade so far. The blade and scalpel are designed for surgeons but who is to say I am not one? I just operate on paper.
* model names and numbers on scalpel and blade have been digitally removed.