Rejuvenation is a process whereby a damaged and dirty print can be rendered usable again for further projection. This process is offered by some commercial laboratories. It may be possible to rejuvenate a release print to a certain degree.
Chemical rejuvenation: In ion exchange or softening applications, regeneration refers to the use of a chemical solution (regenerant) to displace the contaminant ions deposited on the ion exchange resin during the service run, and replace them with the kind of ions necessary to restore the capacity of the exchange medium for reuse. This process is also called recharging, or rejuvenation. Catalyst media are recharged similarly.