This is posted by Hilary Wright on behalf of Jaydeyn Thomas who is not a
member of this list but is the curator of the Burnie Regional Museum
Tasmania. They have a purpose built freezer store.
'Our freezer defrosts three times a day for 15 minutes – the whole
defrost cycle is completed in that 15 minutes. One of the reasons we
have passive humidity control within the cabinets to is to ameliorate
the fluctuations (passive control via silica granules). We have the
negatives in at least three layers of protection as well which slows
down the defrost within the cabinets. Nitrate is a bit different to
acetate – I don’t have any concerns about the acetate negs in our
freezer with our additional ‘padding’. Nitrate I would be more concerned
if the temp fluctuations were for longer…'
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