Carcass weight makes chilling a colour-management variable

A new Meat Science study focuses on a variable that many plants treat uniformly: chilling rate in relation to carcass weight. Its results indicate that light beef carcasses chill more rapidly than heavy ones under the same chilling programme. Relatively small differences—about 50 kg per carcass side—were already sufficient to change the temperature-decline curve and lean-colour development.

The key point is not that rapid chilling is always wrong. The research shows that one cooling setpoint does not create the same post-mortem process in every carcass. In lighter carcasses, accelerated chilling was associated with darker lean colour. The authors also describe an early critical window in which chilling, carbohydrate metabolism and colour formation interact.

For ageing, cutting and retail, colour is an immediate commercial variable. A darker appearance can reduce visual acceptance even when the meat is microbiologically sound and other parameters do not point to an obvious defect. The work therefore links technical chilling management to a specification and presentation issue, not merely to energy use or chiller capacity.