C 6.13. Folds

Damage caused by folding the parchment.

Fractures develop when it is necessary to bind the parchment sheets or to fold one parchment sheet in order to make it more convenient to handle and store. When binding, parchment sheets cut out of leather were folded (broken) in half according to certain rules, into folios (Latin bi-folio) comprised of two sheets and four pages.