The trouble with turning white cotton black—or almost any color—is that the plant emits a strong negative electric charge, which repels dye just as two magnets oppose each other. The current solution is essentially to infuse the dye slurry with salt, so it sticks to the fibers. But the process sucks up a lot of time and energy, and about half the dye goes to waste. ColorZen is the innovative yet simple solution to move the fashion industry toward a more sustainable future.

 

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