A yellow quart of UV fluorescent ink

About UV Fluorescent Marking Inks

Carco’s UV Inks are available in solvent- and water-based formulas. Regardless of formulation, we can promise fast drying, uniformity, and reliability. Please note that our formulations do not cure. Our experts will work with you to find the ink that best suits your application.

Key Features & Benefits

  • Invisible: When this ink is applied, it will appear invisible on all substrate types until exposed to UV light (365nm).
  • Compatibility: Our UV fluorescent inks are compatible with all of Carco’s automated marking systems, including our newest EZ Mark System.
  • Secure: These inks are designed for specialty applications and other scenarios where security or discreet markings are needed, including inventory tracking and quality control.
  • Fast-Drying: Carco’s UV fluorescent inks formulations are available in quick-drying formulations as well as water-based and slow-drying options to reduce maintenance. 

Color Options We Offer

UV fluorescent inks will appear invisible until exposed to UV light (365 nm). When exposed to UV light, we can formulate the ink to fluoresce as either blue or red.

Our UV Fluorescent Marking Inks

FL-1000-HFSlow-drying. Designed for use in leak test marking applications using our ES-612, ES-712, or mini-contact markers.
FL-1000-NMedium-fast drying. Designed for use in leak test marking applications with our ES-612, ES-172, or mini-contact markers.
FL-1000-IFast-drying. Formulated to work in defect marking and UV detection applications in the steel and metals industry when using our ES-800 spray system, ES-1157 Jetshot, or ES-400 non-contact system.
FL-1639Super-fast drying. Works well in steel/metal defect marking applications with our ES-800 spray system.
FL-1644Super-fast drying. An excellent choice for UV detection applications in the steel/metal industry, and is recommended for use with our ES-800 spray system.
WFL-860Water-based, non-hazardous. This model is ideal for cut point/count break marking in packaging and can be used with our ES-400, EES-800, and ES-1157 Jetshot systems.

Common Industry Applications

  • Leak Test Marking: These inks are invisible until exposed to UV light, so they are highly recommended for leak test marking applications to avoid cosmetic markings on consumer-end goods.
  • Cut Point/Count Break Marking: Our UV inks are great for marking cut points in paper, fabric, metal sheet, and other continuous web material processes because they offer reliable guidance without contaminating the final product.
  • Defect Marking: Easily mark defective areas on textiles, automotive parts, or electronics assemblies with our UV inks. Once reworked, these markings remain invisible to the end user and won’t interfere with printing, coating, or finished processes.

Why Choose Carco’s Inks?

All of our UV fluorescent inks are made to order based on your unique application. Formulations can be modified based on the type of substrate you’re applying the ink to and the ideal drying time required for the application.

As a domestic company, we can also promise responsive communication, industry-leading turnaround, and cost-effective solutions to our U.S. customers.