Cambridge-based colour innovation company Sparxell, founded by University of Cambridge scientists Dr. Benjamin Droguet and Professor Silvia Vignolini, has unveiled its first textile ink made from dye-free, plant-based pigments. The launch, in partnership with Positive Materials, marks a major milestone in making sustainable colour solutions available to fashion brands globally.

Sparxell’s textile ink is the world’s first commercially available, biodegradable, plant-based colouring solution. Inspired by nature, it avoids toxic dyes, synthetic plastics, and mined materials, while still delivering vibrant colour and durability. A rollout featuring all-over printed cotton jersey using the new ink will be released in Europe by September 2025. Additional colour options will be introduced throughout the year, supported by Sparxell’s advanced colour platform.

The ink uses “structural colour,” a method inspired by the natural light-reflecting properties found in butterfly wings. Instead of relying on chemical dyes, Sparxell engineers plant-based cellulose at a microscopic level to produce colour through light manipulation, resulting in a more sustainable and long-lasting colour solution.

Dr. Benjamin Droguet, Founder and CEO of Sparxell, stated: “This launch changes how brands access our sustainable technology. For too long, vibrant colours came at an environmental cost. We’re proving that nature-based colour can be both high-performing and sustainable.”

Elsa Parente, Co-CEO and CTO of Positive Materials, added: “Now, designers can choose a biodegradable, toxin-free pigment with the same ease as conventional options. Our partnership with Sparxell brings innovation that the textile industry urgently needs.”