"Has anyone
looked at how old paper should be preserved?"
Although it is harder to store, you might want to think
about storing it as
rolls instead of fan-fold. Old paper tape has a nasty habit of breaking at
the creases.
And I'll bet the old mylar "peel and stick" patches for regular broken
paper
tape and creases are even harder to find than fan fold paper tape.
I'm thinking that the better grades of paper tape that were oiled will last
considerably longer than the "plain yellow".
Bill