Grog Black Magic Ink 70. UV Reactive Stealth Ink Refill

The Grog Black Magic Ink 70 is the ultimate stealth ink refill, engineered for those who operate with tactical precision. This unique invisible ink is formulated to be transparent upon application, making it ideal for high-risk missions where discretion is key. Its core technical feature is its chemical composition: it’s a UV reactive ink that develops its true color only after exposure to sunlight. This is a high-penetration dye formula, designed to seep deep into surfaces, ensuring the tag becomes a permanent part of the material once it fully develops.

This 70ml graffiti marker refill is optimized for use in a wide range of markers, especially Grog Squeezers and Cutters, where its fluid consistency ensures a perfect flow. While it performs exceptionally well on porous surfaces, its high-staining properties also make it effective on non-porous materials like plastic. The application of this stealth ink is a strategic move for any writer focused on stealth graffiti, allowing a tag to be placed unnoticed and appear hours later. This formula is a key product in the specialized Grog BMI Black Magic Ink line.

Once exposed to UV rays, the ink undergoes a chemical transformation, slowly darkening to a deep and permanent dark brown-black. This ensures that what starts as a covert mark becomes a bold, high-contrast tag that is extremely difficult to buff due to its deep penetration. The permanence and unique application method make this refill a legendary tool in any writer's gear. For a full breakdown of its chemical properties and developing times, you can consult the official Grog Black Magic Ink 70 technical page.

How does Grog Black Magic Ink 70 actually work?
Grog Black Magic Ink 70 is a UV reactive dye ink. It is applied transparently and then slowly darkens to a deep brown-black color when exposed to UV light sources, like the sun.

On which surfaces is Grog Black Magic Ink 70 most effective?
Grog Black Magic Ink 70 is most effective on porous surfaces, as its formula penetrates deeply. It also works well on non-porous surfaces such as metal, plastic, and glass.

What is the final color of Grog Black Magic Ink 70?
Once exposed to sunlight, Grog Black Magic Ink 70 reveals a permanent, highly resistant, and deep dark brown-black color, perfect for high-contrast tags.

Which markers can I use with Grog Black Magic Ink 70?
This stealth ink refill is designed for Grog markers but is compatible with most refillable markers. Its fluid, alcohol-based formula ensures it works well in various tools.