TagsColor-changing
Tag: Color-changing
Colour-changing afterglow protects banknotes
A team of chemists in China has discovered a single compound that has a colour-modified afterglow.
According to Chemistry World, this technique could protect banknotes...
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Philippines’ new enhanced security banknotes
The Philippines’ central bank has launched new PHP 50, PHP 100, PHP 200, PHP 500 and PHP 1,000 banknotes.
The Bangko Sentral ng Pilipinas (BSP)...
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Optical effect of novel structural colour OVD
Optically variable devices (OVDs) display special visual effects such as colour-shifting and image-shifting representation. OVDs which are composed of microscopic structures are quite different...