This paper aims investigating the freeze-drying process to recover flooded archival materials. Good restauration results can be obtained through this process as water freezing, after soaking, allows stopping all undesired chemical and physical phenomena caused by liquid water, and, then, ice removal through sublimation, at low pressure, allows avoiding any further damage. An extensive experimental investigation was carried out in an industrial-scale freeze-dryer, aiming to prove the effectiveness of the process and to provide guidelines for carrying out the freeze-drying process. A simple mathematical model is proposed to evaluate the effect of some operating conditions on the drying time.

On the use of freeze-drying to recover flooded archival materials / Barresi, Antonello; Fissore, Davide; Pisano, Roberto; Pittino, H.. - ELETTRONICO. - (2017), pp. 1-8. (Intervento presentato al convegno EuroDrying’2017 – 6th European Drying Conference tenutosi a Liège, Belgium nel June 19-21, 2017).

On the use of freeze-drying to recover flooded archival materials

BARRESI, Antonello;FISSORE, DAVIDE;PISANO, ROBERTO;
2017

Abstract

This paper aims investigating the freeze-drying process to recover flooded archival materials. Good restauration results can be obtained through this process as water freezing, after soaking, allows stopping all undesired chemical and physical phenomena caused by liquid water, and, then, ice removal through sublimation, at low pressure, allows avoiding any further damage. An extensive experimental investigation was carried out in an industrial-scale freeze-dryer, aiming to prove the effectiveness of the process and to provide guidelines for carrying out the freeze-drying process. A simple mathematical model is proposed to evaluate the effect of some operating conditions on the drying time.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11583/2683383
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