Morning folks,

we are trying to get some extra freezing done as we have lost time due to the 
Covid epedemic.

Has anyone got any research on thaw times for freezing they are prepared to 
share?

At the moment we have a rather long return to ambient from -35c / -30c 
primarily to allow the objects to thaw slowly and prevent thermal shock but 
would like the option to reduce this both in our manual operation and to change 
our computer settings.

Note we do not open the freezer and handle the objects whilst frozen as a 
precaution due to potential embrittlement.

our current programme is this

48 hours to reach -35c (or more if not met)
72 hours at -35c to treat
41 hours to defrost/thaw

Any thoughts on this would be appreciated

many thanks

Adie

Adrian M Doyle is currently working from home but is available via e mail on 
ado...@britishmuseum.org

Adrian (Adie ) Doyle
Integrated Pest Manager
Department of Property and Facilities Management
British Museum
London
UK

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