I work in a fuji minilab, the paper stays in the cupboards for months before being used (none of it is expired of course its all dated thoroughly) so the thought that it cant survive 24 hours or even a week outside a fridge is doubtfull unless theres other conditions involved. The AC in the minilab went down for two weeks and the machinery in the room a size of a closet caused it to be so hot the lab techs had to take turns walking outside in the general store area and the paper was still fine.