I think the term "nitrated papers" can mean several things.
A) Paper soaked in a KNO3 (or similar oxidizer) and water solution and allowed to dry. Down and dirty, but seems to make the paper burn better, and the paper that does remain after firing smolders relatively quickly to ash (sometimes). Depending on the paper used, this cartridge is probably the most durable for field carry and use. Has a cool factor second to none when you tear the end off with your teeth to load a musket.
B) Paper coated with a nitrocellulose lacquer and allowed to dry. Down and dirty, but waterproofs the paper cartridge somewhat and makes it easier to insert into the cylinder or barrel. Better paper combustion during ignition in my experience, and no smoldering bits to ignite the next charge of black powder.
C) Paper treated in nitric acid and converted partially or entirely to nitrocellulose (guncotton). Elegant and clean. Never tried it, and probably won't, since nitrocellulose (guncotton) is pretty darned similar to what is contained in many types of "smokeless powder".
A and B are both easy to do and both have their proponents. C is pretty dangerous to do at home because of the chemical(s) involved, but can be ordered online as magician's flash paper. Nitric acid nitrates skin just as easily as it does paper, but hurts. . . a bunch. Been there and done that.
None of the above have replaced my Lee Perfect Powder Measure and Triple P cylinder loader combination at the range. But I'll admit to carrying B above when I want to travel light.