Making Sense of Environmental Data

Making Sense of Environmental Data NARA Preservation Conference 2006 James M. ReillyImage Permanence InstituteRochester Institute of Technology

Why Environmental Data? • Environment is best way to achieve and demonstrate stewardship of collections

Why Environmental Data? • To inform key institutional functions • Facilities management • Fiscal management • Archival / curatorial

Environment-Driven Collection Decay Mechanisms • Chemical change • Biological attack • Mechanical damage

Deriving Meaning from T & RH Data • Algorithms to estimate specific decay risks • Integrations over time

Chemical Decay (Natural Aging) Metric • TWPI

TWPI (Time-Weighted Preservation Index) • Measure of chemical change induced by heat and moisture • Typical cause of poor performance: High summertime dew point

TWPI Scale • Poor: 1 – 45 • OK: 45 – 75 • Good: 75 - 100 • Great: > 100

Biological Decay Metric • Mold Risk Factor (MRF)

Mechanical Decay Metrics • Measures risk due to: • Moisture content of collections • Too high • Too low • Dimensional changes as moisture content varies over time

Mechanical Decay Risk Metrics • Too dry – Min EMC • Too damp – Max EMC • Too much expansion and contraction – % DC Max • Typical cause of poor performance: • Winter dryness

Interpreting Data: Weigh the Risks According to the Nature and Importance of Collections • Archival & library materials: • Chemical, biological • Fine arts & rare books: • Mechanical, chemical, biological

Metrics in Practice • At LoC • Identified underperforming spaces • Achieved operating improvements • At NYPL • Helped redirect capital plan for global improvements • At NARA • Used in DC, Regions

Fundamentals of Preventive Conservation • Gather and organize information • Materials and modes of decay • Storage circumstances • Present condition • Analyze risks • Take actions to minimize decay

Prototype of Collection Storage Information System • Built for National Museum of Denmark • Shown with permission • Linked Information • Climate • Collections • Mechanical systems

The Image Permanence InstituteRochester Institute of Technologywww.imagepermanenceinstitute.orgwww.climatenotebook.org

Acknowledgements • Andrew W. Mellon Foundation • NEH Division of Preservation and Access • IMLS • NARA • National Museum of Denmark

Making Sense of Environmental Data

Making Sense of Environmental Data

Presentation Transcript

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