The project explores the potential of pH-responsive textiles through hydrogel yarns infused with anthocyanin pigments.

Designed to visually respond to pH changes, the prototype transforms an invisible environmental parameter into a dynamic, color-changing display. During a five-day exhibition, the yarns maintained their color variations even as they dried, though some darkening occurred over time.

By making pH fluctuations visible, the Reagent Yarn prototype fosters engagement with environmental issues such as ocean acidification and acid rain. It highlights the interconnectedness of physical and biological systems while demonstrating the impact of human activity on ecosystems and urban environments. Its responsiveness suggests potential applications as a ‘soft’ urban monitoring system.