Scientists develop hidden color-changing material to protect banknotes and passports
SMRTR summary
Finnish researchers have developed davyne, a mineral that hides security markings invisible to the naked eye but reveals them under infrared light. Unlike existing anti-counterfeit materials, davyne's near-infrared activity can be switched on and off, making it a promising tool for protecting banknotes and passports from counterfeiting.
SMRTR provides this summary for quick context. The original article belongs to Interesting Engineering.
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