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Fungal Threat to Archived Film

Microbes could be threatening our cultural heritage by degrading historic cinematographic film and even preventing some valuable footage to be archived at all.

Mr Gavin Bingley who is presenting his work at the Society for General Microbiology's autumn meeting in Nottingham describes how fungal growth on cinema film can not only lead to deterioration of the film but may also pose a risk to the archivist.

"Fungi that form mould on film reels produce enzymes that enable them to use components of the film for growth, leading to degradation of the film," explained Mr Bingley from Manchester Metropolitan University. "If the film is especially mouldy, high numbers of spores can be released into the air, which means they could also be considered as a health risk."

The team looked at a range of contaminated film reels supplied by the North West Film Archive at Manchester Metropolitan University to assess the numbers and types of spores released during a mock inspection. "The majority of fungi present were Aspergillus and Penicillium species, which are both very common moulds," said Mr Bingley. "For some films we found that the number of spores released exceeded the recommended safe exposure levels."

Cine film donated to archives is used as an important historical and cultural resource. Films are stored in carefully controlled conditions, but if they are already contaminated on arrival at the archives, they can deteriorate further over time.

Destruction of the film is not the only way that valuable footage can be lost, as Mr Bingley points out. "Our studies show that while some films look like they are contaminated, this may just be dead mould that won't damage the film any further. As it is impossible for archivists to know whether the mould is living or not, valuable footage may not be archived but discarded instead," he said.
 
 

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