Involves intervention order to repair damage or counteract deterioration. And there are various remedial ways of preserving archival materials this are; Refotmating,Fumigation,Binding,Deacidification and encapsulation.

All actions directly applied to an item or a group of items aimed at arresting current damaging processes or reinforcing their structure. These actions are only carried out when the items are in such a fragile condition or deteriorating at such a rate, that they could be lost in a relatively short time. These actions sometimes modify the appearance [..]

Treatment that stabilizes the condition of an object. Usually done when an object is in danger of immediate damage.