Fluorescent, Semi-Transparent Window Boosts Banknote Security

In the July edition of Holography & Optical Technology News®, we spotlighted Q&T Hi-Tech Polymer’s POLYSECURE SHIELD – the polymer banknote substrate with an embedded OVD. In this issue, we continue our coverage of banknote anticounterfeiting innovations with a look at the CBRI’s new approach to window security features, blending fluorescent effects with fine-pattern transparency directly in paper substrates.

CBRI has developed a novel fluorescent semi-transparent fine-grained anticounterfeiting window technology based on modifying the internal structure of banknote paper. This technology constructs high-precision ‘watermark-like + fluorescent’ window features directly on the paper base, offering a new approach that overcomes the limitations of traditional window technologies.

Large-scale semi-transparent window effect; reflected light (left), transmitted light (middle), and window effect (right).

Fluorescence compositing UV.