Cluster Analysis to identify Microclimate Patterns in a Multi-room Film Archive

Lisa Vergelli, Francesca Frasca, Chiara Bertolin, Gabriele Favero, Anna Maria Siani

Abstract

This paper presents an objective methodology for clustering the indoor microclimate of a multi-room cinematographic archive housing climate-sensitive film materials. The proposed methodology was tested on a selected case study: an archive housing cellulose acetate films located in the Mediterranean area. A multivariate statistical approach (cluster analysis) was used to identify clusters of rooms from temperature and relative humidity observations recorded continuously in the archive’s storage rooms over a 7-month period. The outputs of this work led to a reduction from 26 rooms to four clusters representing four homogeneous microclimate patterns among the clustered rooms, reducing the time-consuming processing of large amounts of thermo-hygrometric data. The identified microclimate patterns allowed to target a number of rooms where to perform inspections, expedited in time but still objectively representative for all rooms, of the occurrence of the vinegar syndrome affecting cellulose acetate films and depending on thermo-hygrometric storage conditions.

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IMEKO-MetroArchaeo-2023-120.pdf

DOI

10.21014/tc4-ARC-2023.120

IMEKO TC

TC4 - Measurement of Electrical Quantities

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