The conservation of historic libraries can be referred towards both the ancient book collections and the buildings themselves. Heritage collections made of paper are threaten by climate-induced deterioration risks such as cellulose hydrolysis. Several studies have investigated the microclimate inside historic libraries but comparisons are difficult due to the lack of long-term microclimate observations and uniformity in the use of standards and risk assessment methods. For the first time, the long-term microclimate observations collected in three historic libraries in Italy were comparatively studied to outline differences and similarities of their microclimates in terms of paper preservation. A multidisciplinary approach was applied to assess the building performance (a) and the deterioration risks for the collections (b). As for a), a common feature of the libraries was the high thermal inertia and low indoor-outdoor air exchanges. As for b), the Time Weighted Expected Lifetime (TWEL) was defined to account for an average chemical risk on a seasonal and yearly basis. TWEL allowed to highlight the impact of the most adverse conditions on the overall chemical risk for acidic paper preservation (e.g., temperatures above 20 ◦C reached naturally in summer/artificially in winter). It resulted that the measured microclimate conditions in the libraries would lead to the loss of their acidic collections in less than 300 years. Demographic plots were finally used to inform about the risk resulting from the synergy between handling and microclimate as well as to explore the effectiveness of possible preservation measures such as the deacidification of 10% of the collections.

Climate-induced risk for the preservation of paper collections: Comparative study among three historic libraries in Italy / Verticchio, Elena; Frasca, Francesca; Bertolin, Chiara; Siani, Anna Maria. - In: BUILDING AND ENVIRONMENT. - ISSN 0360-1323. - 206:(2021). [10.1016/j.buildenv.2021.108394]

Climate-induced risk for the preservation of paper collections: Comparative study among three historic libraries in Italy

Elena Verticchio
Primo
;
Francesca Frasca
Secondo
;
Anna Maria Siani
Ultimo
2021

Abstract

The conservation of historic libraries can be referred towards both the ancient book collections and the buildings themselves. Heritage collections made of paper are threaten by climate-induced deterioration risks such as cellulose hydrolysis. Several studies have investigated the microclimate inside historic libraries but comparisons are difficult due to the lack of long-term microclimate observations and uniformity in the use of standards and risk assessment methods. For the first time, the long-term microclimate observations collected in three historic libraries in Italy were comparatively studied to outline differences and similarities of their microclimates in terms of paper preservation. A multidisciplinary approach was applied to assess the building performance (a) and the deterioration risks for the collections (b). As for a), a common feature of the libraries was the high thermal inertia and low indoor-outdoor air exchanges. As for b), the Time Weighted Expected Lifetime (TWEL) was defined to account for an average chemical risk on a seasonal and yearly basis. TWEL allowed to highlight the impact of the most adverse conditions on the overall chemical risk for acidic paper preservation (e.g., temperatures above 20 ◦C reached naturally in summer/artificially in winter). It resulted that the measured microclimate conditions in the libraries would lead to the loss of their acidic collections in less than 300 years. Demographic plots were finally used to inform about the risk resulting from the synergy between handling and microclimate as well as to explore the effectiveness of possible preservation measures such as the deacidification of 10% of the collections.
2021
Library collection; Microclimate investigation; Preventive conservation; Historical building; Paper deterioration; Preservation risk assessment
01 Pubblicazione su rivista::01a Articolo in rivista
Climate-induced risk for the preservation of paper collections: Comparative study among three historic libraries in Italy / Verticchio, Elena; Frasca, Francesca; Bertolin, Chiara; Siani, Anna Maria. - In: BUILDING AND ENVIRONMENT. - ISSN 0360-1323. - 206:(2021). [10.1016/j.buildenv.2021.108394]
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11573/1578177
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