PHINK

Phink is a smart stamp designed to help athletes monitor their hydration. It uses a plant-based halochromic dye, specifically based on anthocyanins extracted from red cabbage, which changes colour according to the pH of the skin.
During endurance training, sweat mixed with the skin's acid mantle causes changes in pH, indicating levels of dehydration. When Phink detects these changes, the ink changes colour, alerting the wearer to drink water. This technology allows for accurate and continuous monitoring of hydration, ensuring optimal performance and proper recovery.