Quoting Tony Duell <ard(a)p850ug1.demon.co.uk>uk>:
In general, the higher the data density, the more
likely it is to
get damaged (it takes less wear/damage of the medium to erase a
bit). So you'd not want to have too high a data density if you want
the result to be 'archival'. And the problems/solutions for
preserving paper (be it documents, or presumably punched tape) are
reasonably well-known, I think.
The *other* thought that came to my mind was that they could find
something to work in place of paper -- some plastic, metal, or other
material that would better handle more densely packed data.
--
Jeffrey S. Sharp
jss(a)ou.edu