The Stealth Invisible Ink Refill is a specialist marking ink designed to create discreet marks that develop and darken through exposure to UV light. Initially virtually invisible when applied, the unique formula reacts with UV rays over time, gradually developing into a dark brown to black shade. The more UV exposure the ink receives, the darker and more prominent the mark becomes, with direct sunlight producing the fastest results. Designed for refilling compatible markers and squeezers, Stealth Ink offers a highly durable, long-lasting finish and is available in convenient refill bottles for repeated use.

Features and Benefits

• Invisible Application: Applies virtually invisible before gradually developing through exposure to UV light.
• UV-Activated Formula: Reacts with UV rays to develop into a dark brown to black shade.
• Progressive Darkening: Continued UV exposure causes marks to become darker and more visible over time.
• Long-Lasting Formula: Designed to produce highly persistent marks with excellent longevity.
• Refillable Solution: Ideal for topping up compatible empty markers, mops and squeezers.
• Controlled Refilling: Supplied in a resistant refill bottle designed to help make transferring ink cleaner and easier.
• Available Sizes: Offered in 100 ml and 200 ml refill bottles.

How to Use

Carefully open the Stealth Invisible Ink Refill and transfer the required amount into a compatible refillable marker, mop or squeezer. Securely close both the marker and refill bottle after filling to help prevent leaks or spills. Apply the ink to a suitable surface and allow it to develop naturally. The mark will initially appear virtually invisible before exposure to UV light gradually causes it to darken. Direct sunlight provides the strongest UV exposure and typically develops the mark faster, while artificial or lower-intensity UV exposure may take longer. Always test on a small area before use and store the refill securely when not in use.