We reprint old books after checking out copyrights (for all books, this means pre-1930, but for some (I'd actually say most) it also means ones published up to 1964 and 1973, depending on how the rightsholders did (or didn't) do the renewals).
We use a special guillotine type cutter to cut off the binding and then store the pages in a sealed plastic bag which goes in the archives; they're stored there indefinitely in case the book needs rescanned for some reason. We also keep the original, uncompressed copies of the books on magnetic disks.
We also go out of our way to try to find rare books published in 1931, 1932, etc. so they are ready to go once the copyright expires.
And no, no AI company has ever come to us and asked to run training on all of our scanned copies.
We use a special guillotine type cutter to cut off the binding and then store the pages in a sealed plastic bag which goes in the archives; they're stored there indefinitely in case the book needs rescanned for some reason. We also keep the original, uncompressed copies of the books on magnetic disks.
We also go out of our way to try to find rare books published in 1931, 1932, etc. so they are ready to go once the copyright expires.
And no, no AI company has ever come to us and asked to run training on all of our scanned copies.