Procart Invisible UV Black Light Ink for Inkjet Printers - Fluorescent

In this review the Procart Invisible UV Black Light Ink for Inkjet Printers is evaluated for anyone who needs covert, fluorescent printing that only appears under black light. The bottom line: this 10 ml cyan invisible ink is best for small-scale security marking, event tickets, decorations and brand authentication because it prints clear, invisible images under normal light and fluoresces strongly under a 365 nm UV lamp. The reviewer found it straightforward to use in refillable inkjet cartridges and especially useful where visual secrecy and water and sunlight resistance matter.

Key Features

• Invisible under natural light: Prints are undetectable to the naked eye so covert marks remain hidden until illuminated by UV.
• Optimized for 365 nm UV: The fluorescent cyan reacts best to a 365 nm black light, producing bright visible images when illuminated.
• Inkjet compatible: Formulated to work with refillable inkjet cartridges so users can print invisible images directly from their printer.
• Durable formulation: The ink resists sunlight, water and heat, maintaining fluorescent intensity over time in typical handling conditions.
• Security and marking use: Useful for secure documents, tickets, labels, property marking and anti-counterfeiting due to its hidden nature.
• Small 10 ml bottle: A compact volume for testing, short runs, or adding a security color to existing workflows.

Who It's For

This ink is aimed at small businesses, event organizers, schools and hobbyists who want an affordable way to add invisible security marks, secret artwork or special decorations that reveal under a black light. It is also helpful for anyone doing property marking, label verification or brand authentication in situations where visible marking is undesirable.

People who require industrial-scale security printing, long production runs or guaranteed compatibility with proprietary cartridge systems should look elsewhere; this product is designed for refillable inkjet setups and small-to-medium applications rather than high-volume factory use.

Pros & Cons

Pros

• Truly invisible in normal light, making covert marks simple and discreet.
• Bright fluorescence under a 365 nm UV lamp, producing clear, readable results.
• Resistant to sunlight, water and heat, so markings remain effective after exposure.
• Works with refillable inkjet cartridges for straightforward printing workflows.

Cons

• Only suitable for inkjet printers and refillable cartridges, so it is not compatible with all printing systems.
• Small 10 ml volume may require frequent refills for heavier users.

Specifications

Product name	Procart Invisible UV Black Light Ink for Inkjet Printers
Color	Cyan (fluorescent)
Volume	10 ml
Printer type	Inkjet (refillable cartridges)
Best UV wavelength	365 nm
Resistance	Sunlight, water and heat resistant

Our Verdict

The Procart invisible UV cyan ink is a practical, low-cost way to add hidden fluorescent marks using an inkjet printer and refillable cartridges. It is good value for small businesses, event managers and hobbyists who need discreet, durable security marks or decorative effects that reveal only under a 365 nm black light.

Frequently Asked Questions

Will this ink show up under normal light?
No, the ink is formulated to be invisible under natural light and becomes visible only when exposed to UV at about 365 nm.

Can I use this with standard disposable cartridges?
This ink is intended for use with empty refillable inkjet cartridges rather than sealed disposable cartridges.

Is the print durable outdoors?
The ink resists sunlight, water and heat, so prints maintain fluorescent intensity under typical exposure, but long-term outdoor durability depends on conditions and substrate.