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ReformattingThe process of converting information from one form to
another - see also reprography and surrogate. Reformatting is usually
undertaken when the long-term survival of information can no longer be
guaranteed in its current format. Reformatting or information migration
is increasingly being used for electronic and digital information as
existing hardware and software becomes obsolete.
Relative humidity (RH)The percentage of moisture contained in air as
compared with that required to completely saturate it at a given temperature.
A low relative humidity of around 40% is considered ideal for paper storage,
but is very difficult to achieve in the humid tropics. Mould growth becomes
a serious problem above 70% relative humidity.
ReprographyA range of processes used to copy or produce reproductions
of items by optical or photographic means - including photography, photocopying,
and microfilming.
ReproductionSee facsimile. A copy of an original item, not necessarily
in the same form.
ReversibilityThe ability to undo a process or treatment with no or minimal
change to the object. Reversibility is an important goal of conservation treatments, but it must be balanced against other treatment goals or
options. Full and total reversibility is an ideal that is impossible
to achieve.
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