The most severe type of "pressing", with a complete disassembly, is much more invasive than a minuscule edge trim imho. Put the results of both treatments into context… Removing a sliver still leaves 99% of the factory book assembly intact. A tiny edge piece is missing. A downgrade of the book could be comparable to a clipped coupon. Something "factory" is missing.
Disassembly defines "invasive" imho. It completely undoes the factory book assembly 100%. The vintage book no longer exists. When the treatment is finished you a have a modern comic book created from vintage parts.
I agree that dissambled pressing is the most invasive of the pressing techniques but from what I've heard most restoration artists prefer not to disassemble given the extreme difficulty in returning the staples to their original position. They do it as last measure for things lke spine roll. So I would think the vast majority of pressed books out there have not been disassembled.
_________________________ "Get over it, " --Dale Roberts
