And others have pointed out that DEC handbooks are on
truly lousy paper.
Therefore, the _solution_ is to scan them at best possible resolution. Fix
any scanning artifacts, the _print them_ on acid free paper and bind
_that_. Problem solved, the book still exists (now in a good form) and
there is a digital copy as well.
It's also interesting to note that DEC themselves made copies of some
handbooks apparently. I've got two handbooks that are obviously copies and
bound with plastic spiral combs. When I asked about these a couple years
ago, I was told this was common. Of course the two I've got are of books
where the original actually has better paper if anything :^)
Zane