Photo: Antti T. Nissinen / Flickr (CC BY 2.0)

Stuff.co.nz: Strict food-safety rules are followed at every step. Each 24-hour cycle is broken into quarters and all food is colour coded to indicate when it’s made. At midnight every day, all fridges are cleared and a new cycle begins. Heating times, cooling times, blast freezing and fridge temperatures are meticulously controlled.

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