Our Opticz Yellow UV Blacklight Reactive invisible ink markers are made with a specially blended high quality water based ink for full the best blacklight effects. Perfect for identification marking, body art, and other stealthy security uses. Goes on invisible in normal light and glows bright yellow in blacklight.
These markers have a large body and large rounded tip. Great for shading in larger areas while also being capable of fine point application. The XL version has 2x the amount of ink than our standard sized markers adding value and longevity.
Security grade ink is designed to stick and be very tough to remove. Does not simply wash off. Ink adheres and works best on textured surfaces. Safe for external use on skin. Avoid sensitive areas like eyes and mouth.
These unique markers can be used for glow parties, escape rooms, secret messages, industrial coding, event tickets marking, security printing, coupons, raffle tickets, inventory control, authentic returns verification, advertising and more! Requires ultraviolet blacklight. They do not glow in the dark on their own.
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