“At Wikimania Montreal last month, BAnQ and Wikimedia Canada invited Montrealers to digitize iconographic archives in peril. Negatives dating back to the beginning of the century were rapidly oxidizing, and the digitization of these archives was urgent. One hundred volunteers came to the rescue of these memories of Quebec.”
https://blog.wikimedia.org/2017/09/18/banq-scan-a-thon/
via Calle Eklund