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Projects & Research

Development and deployment of sustainable practices for designing and managing the storage environment for preservation.

Environmental Management & Preservation Projects

Description of the Preservation Metrics

In the mid-1990’s IPI began work on computer modeling and the development of algorithms to measure the effects of the storage environment on collections. This research led to the introduction of the general quantitative model of chemical decay in organic materials called the time-weighted preservation index (TWPI), published in New Tools for Preservation: Assessing Long-Term Environmental Effects on Library and Archives Collections. Based on this concept, IPI developed the Preservation Environment Monitor® datalogger and Climate Notebook® software. During field trials of these tools, IPI developed additional metrics for environmentally induced mechanical damage, biological decay, and metal corrosion. 

More information about the Preservation Metrics

Related Articles

  • Managing the Environment for Preservation: Our Philosophy, 2008
  • Specifying Storage Environments in Libraries and Archives: Talk by James Reilly at the Developing Sustainable Practices in Preservation Environments Symposium, 2007
  • Metrics for Preservation Environments: Remarks by James Reilly to Heritage Preservation's Annual Meeting, 2006
  • The Impermanence of Permanence: Remarks by James M. Reilly at the IS&T Archiving Conference, May 23, 2007