Georgia Tech chemists have developed water-based electrochromic film inks for colour-change applications such as auto-dimming rear-view car mirrors. “There were some hurdles to pulling it off,” said GaTech. “The finished product had to electrically operate comparable to films that are applied in an organic solvent, and also be water-resistant in spite of the water-based production.” ...
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from Electronics Weekly https://www.electronicsweekly.com/news/research-news/electro-colour-changing-ink-printed-water-2017-08/
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