The Biogenic Amine Sensing Pad is a smart paper-based freshness indicator designed for meat and high-protein foods. It contains a chemosensing ink that reacts to biogenic amines, which are key spoilage gases released when meat deteriorates. During storage and distribution, the pad sits close to the product and changes from colourless to blue as biogenic amines accumulate, giving a clear visual signal of spoilage risk.  This enables internal QC teams, central kitchens and frozen food factories to quickly identify unsafe batches, reduce food waste, and protect brand reputation without complex instruments.