![]() ![]() ![]() In 1997, IPI discontinued the production of SilverLock. ![]() The specific purpose behind the design of IPI SilverLock was to ensure the stability of preservation microfilm.ģ. Work was supported by grants from Office of Preservation, National Endowment for the Humanities (NEH) the National Historical Publications and Records Commission (NHPRC) and the New York State Library Preservation Grant Program as part of a general effort to preserve the informational content of the nation’s brittle books. The formula for SilverLock was developed by the Image Permanence Institute (IPI) as a result of five years of federally funded research. SilverLock completely prevents red spots. The silver in a film emulsion can react in somewhat the same way, except that the deterioration typically appears in the form of spots (sometimes referred to as red spots). Metallic silver is very susceptible to oxidation - a fact you can appreciate if you have a silver table service that must periodically by cleaned of tarnish. It does this by converting most of the metallic silver that makes up the image to silver sulfide. SilverLock is a protective chemical bath that makes silver film resistant to the effects of atmospheric pollutants. Question: What is SilverLock? Will it prevent red spots? This document was originally created by the Image Permanence Institute (IPI), modified by Backstage preservation services, and approved by IPI.ġ. ![]()
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