Grog Black Magic Ink
Grog Black Magic Ink is 70ml of alcohol and water-based dye invisible ink that reacts only under UV lights until it turns into a deep dark brown satin finish.
Ideal for both indoor and outdoor sessions, Black Magic Ink™ is suitable for writing on all kinds of porous surfaces such as paper, cardboard, marble, concrete and painted surfaces.
Grog BMI works great in both mops and valve-action markers and is not recommended for use on glass or other non-porous surfaces.
For more invisible ink, check out the Stealth Ink SQZR 80ml squeeze mop, also in stock.



UPS Ground Delivery: Estimated 1-5 business days.
USPS Ground Advantage: Estimated 1-5 business days.













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