> I'm not sure I understand the difference between modern and classic inks. Is there a definition somewhere? I'm not sure if there is an official definition.

> I'm not sure I understand the difference between modern and classic inks. Is there a definition somewhere? I'm not sure if there is an official definition. But what I mean by this, is that classic inks (like iron gall) were usually a combination of pigment and an acid as a carrier. Modern inks are usually alcohol or water carriers with nano-pigments or dyes, combined with surfactants which helps ensure the ink flows well without any issues across varied paper types. Ink has moved forward rather significantly in modern times, but I am not a chemist so I can't really get into details. I've used (out of some desire for the archaic) some correct reproductions of classic inks like iron gall or other pigment inks and it is kind of nasty and clogs the nib of the pen, but leaves a very permanent mark on the paper that has a somewhat unique appearance. I know some people prefer something anachronistic, but I am a fan of modern ink for sure.