UV Fluorescent Ink
An ink containing luminophores. When exposed to UV light (250–380 nm), the luminophores transform UV light into fluorescent light of different colors visible to the naked eye.
![](https://static-content.regulaforensics.com/Hardware-products/knowledge_hub/glossary_documents/UV_FLUORESCENT_INK/1l.webp)
a
![](https://static-content.regulaforensics.com/Hardware-products/knowledge_hub/glossary_documents/UV_FLUORESCENT_INK/2l.webp)
b
![](https://static-content.regulaforensics.com/Hardware-products/knowledge_hub/glossary_documents/UV_FLUORESCENT_INK/3l.webp)
c
Fig. 1. Kosovo. Passport issued in 2013:
a — data page. Paper substrate; b — the same. UV light (365 nm); c — the same. UV light (254 nm)
![](https://static-content.regulaforensics.com/Hardware-products/knowledge_hub/glossary_documents/UV_FLUORESCENT_INK/4l.webp)
a
![](https://static-content.regulaforensics.com/Hardware-products/knowledge_hub/glossary_documents/UV_FLUORESCENT_INK/5l.webp)
b
![](https://static-content.regulaforensics.com/Hardware-products/knowledge_hub/glossary_documents/UV_FLUORESCENT_INK/6l.webp)
c
Fig. 2. Hungary. Service passport issued in 2012:
a — data page. Hybrid substrate; b — the same. Fluorescent ink: smooth transition of color in vertical direction. Rainbow printing. UV light (365 nm); c — the same. UV light (254 nm)