Invisible text or image is printed on the paper label, undetectable to the naked eye, but appears to glow under UV light.

Fluorescent ink, available in colors such as red, yellow, green, or blue, is commonly used to print invisible text or images on security stickers, visible only under UV light.

Three invisible ink colors printing on the paper label

Marking agents or taggants in UV ink can react with personalized devices under specific UV wavelengths, adding an extra layer of security to the identification process.

Variable QR codes or serial numbers, designed with invisible ultraviolet ink, enhance anti-counterfeiting measures as they introduce variability to the fixed elements on the label, making replication more challenging.

Lenovo paper label in invisible ink printing

The design flexibility of invisible ink allows for customization based on customer preferences, enabling repeated typesetting or a single pattern to meet specific requirements.

  • Large Order Quantity
  • Long Production Lead Time
  • Intermediate Anti-Forgery
  • Moderate Cost Budget

The use of fluorescent ink has limitations, as it may not penetrate certain paper materials like art paper stickers, mirror coat labels, or paper treated with optical brighteners. Additionally, if exposed to direct sunlight for extended periods or washed with water, fluorescent inks may fade.

Indeed, fluorescent ink technology finds application in various industries such as banknotes, event tickets, passports, and documents requiring direct authentication.

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