UVmerkning
UVmerking, or ultraviolet marking, is the application of ultraviolet-reactive substances to objects so that marks are invisible under normal light but become visible under ultraviolet light. It is used for covert identification, authentication, and tracking, often as a security feature or inventory control.
Most UV marks rely on fluorescent or phosphorescent materials. Fluorescent inks glow briefly when exposed to
Applications span currency and official documents, luxury goods, packaging, pharmaceuticals, art and archival items, and supply-chain
Advantages include being covert, inexpensive, and fast to apply, with minimal impact on the visible appearance.
Where UV marking affects food contact, cosmetics, or children's products, regulatory compliance, migration testing, and material
See also: UV fluorescence, security ink, watermarking, microdots.