Adding an invisible ink marking to product or hang-tag labels helps prevent parallel imports and counterfeit goods from circulating in the market.

UV Fluorescent Solvent-Based Ink

UP45 Half-Inch 42ml Invisible Blue Solvent-Based TIJ Industrial Ink Cartridge
Compatible with HP 2580 / 2590｜Fluoresces Blue Under UV Light｜Covert Security Codes and Channel Tracking

Product Features

The UniPlus half-inch invisible blue solvent-based cartridge leaves virtually no trace under ordinary lighting; the blue fluorescent characters appear only under a UV lamp. Traceability codes and authorisation data sit on the existing packaging surface without taking up design space, and counterfeiters cannot easily determine where the covert code is or what it says.

Product Specifications

Advantages of the UP45 Half-Inch Invisible Blue Solvent Cartridge

Substrates Suited to Invisible Blue

Invisible blue suits applications that need traceability information added without altering appearance. Readability depends not only on adhesion but also on how the substrate itself fluoresces under ultraviolet light.

Commonly printable surfaces:

• Paper: standard card, laminated paper, glossy coated paper and kraft paper (low-fluorescence stocks read best)
• Labels and seals: synthetic paper labels, tamper-evident seals and label materials
• Plastics: PET, PP, PE, ABS and PVC packaging components
• Films: OPP film, shrink film and flexible packaging seal areas
• Metal and glass: aluminium foil, laminated metal and clear glass containers
• Leather and selected synthetic materials (luxury accessories and packaging linings)

Note: paper containing optical brightening agents glows a blue-white across the whole sheet under a UV lamp, which dilutes the contrast of invisible blue characters. For these materials we recommend evaluating invisible red instead. Dark and high-gloss surfaces may also affect how the fluorescence appears. Surface material, coatings, temperature and humidity all influence adhesion and drying performance.

Invisible Blue vs. Invisible Red Solvent Ink Cartridge

The difference between the two invisible inks comes down to the fluorescent background of the substrate.

For full series specifications, see the UP45 Half-Inch 42ml Solvent-Based TIJ Industrial Ink Cartridge series overview.

Compatibility Check

The half-inch invisible blue solvent cartridge is compatible with most non-encrypted half-inch coding systems on the market. Besides replacing the common HP 2580 and HP 2590 cartridges, it also suits a wide range of handheld and inline TIJ coders.

Invisible blue is particularly well suited to the following purchasing scenarios:

Counterfeit goods circulate widely, and brand owners have no straightforward way to mark packaging against them. Visible markings are easily copied by counterfeiters, and brand reputation suffers as a result.

Brand owners and sole agents that need to prevent parallel imports; tobacco, alcohol and luxury packaging companies; parts suppliers and warranty management teams that must verify original manufacturer authorisation; and organisations that print and issue tickets, credentials and other important documents.

Usage and Storage Recommendations

Storage:

• Avoid direct sunlight
• Keep away from environments with excessive dust
• Do not store upside down for extended periods

Usage:

• When pausing use, refit the cartridge into its protective clip so the printhead is not left exposed for long periods
• Use within six months of opening
• Even with no immediate printing requirement, run a test print roughly every two weeks and confirm normal colour development with a UV lamp
• Keep the covert code position fixed and known to only a small number of staff; moving it around adds search time during inspection
• Ink is not edible. Keep out of reach of children; avoid contact with skin and eyes and rinse promptly with clean water in case of contact