I've lived long enough to see my books fall apart from being made from acidic paper, but lucky/smart enough to have jotted all my own writing on acid-free paper. Considering that this was mostly written with Parker ballpoint and MB rollerball, I haven't had to worry about my ink fading or etching the paper I used.

Which brings me to an interesting question: if we care enough for pH neutral paper, why are there so few FP neutral inks?

Sure, there are a few registrar's inks that are neutral and archival, but a profundity of the inks available are very acidic or alkaline. Some claim to be neutral in their marketing, like Waterman Intense Black, but there's no proof that it is.

Why is there such a large marketing dichotomy between the alkalinity of papers and inks?