Oh wow. Did not know that there was an ISO standard for pen refills: https://unsharpen.com/pen-refill-guide/
Unsurprisingly there are also national ink standards. For example certain contracts like marriage licenses in Germany are only legal if signed with one of two DIN standard inks that are certified to last at least a century.
German here. WTF? (Not that I don't believe it, but I couldn't find sources for that one)
It gets a bit weird for printers. Laser and dot-matrix printers generally are okay, but you need a certified ink jet. Problem is that by the time they're certified, they might not be available. And then you only get the certification on proper paper, with the default inks, so don't cheap out on your old HP...
As this is a ISO norm, too, I don't think this is something peculiar to Germany, after all, document storage isn't just a teutonic issue.
In California, and probably other states, a verbal contract is binding (though proving what was said can be tough).
But for certain types of records, you need to ensure longevity, and there are norms for that regarding paper, ink or even digital storage. I would assume the NARA has some thoughts about that, but on the local/state level things will probably be a lot more mixed than in most European nations. Both for different attitudes towards independence (I regret ever mentioning the advantages of a federal ID in Ohio), and experience (outside of universities, Europe is littered with more old documents).
Back in the days before any bespoke product was a search away, tracking done printer ink and toner to print checks for a small business was a surprising chore. Heck, just finding the fonts was itself a bit hard.