Nine Hours to Load: Why the Middle Pack in a Stack Is Still Soft
A pack that reads -18°C on the surface can be liquid at the core after 14 hours. Freeze time maths for stacks, and the loading check that stops soft packs.
Still Liquid at Minus 8: Supercooling and the Packs That Never Really Froze
A shipper pulled twelve packs from a minus 22 freezer after 30 hours, found them rock hard, and loaded them. Two hours into the run, a handler dropped a crate and four of the packs turned to slush in his hands, releasing a wave of latent heat that pushed the box interior up by 3 degrees in eleven mi…
