 Although the monetary value for some collectors (and for most sellers of this sort of material) is destroyed by unbinding, unbinding in many cases actually greatly assists preservation of the physical pages themselves, making them more accessible to researchers and less likely to be damaged when subsequently examined.The down side is that unbound stacks of pages are "fluffed up", and therefore more exposed to oxygen in the air, which may in some cases (theoretically) speed deterioration.This can be addressed by putting weights on the pages after they are unbound, and storage in appropriate containers.