This UV blacklight reactive blue invisible ink large tip marker/pen uses high quality permanent invisible ink. Perfect for identification marking, wall decoration and other stealthy security uses. Glows an incredible bright yellow. Perfect for metal, glass, plastics & paper, etc. Totally invisible, won't wash off, and is only visible under blacklight. This is the pen you want for permanent, invisible marking. Safe for use on skin.

This marker can be used for: event tickets, industrial coding, security printing, coupons, raffle tickets, inventory control, advertising and more! Can also be used on: Aluminum, ABS, acrylic, rubber, cellulose, acetate, formica, nylon, polystryrene and polyethylene normal. Color: Invisible/colorless UV blacklight activated. Color: Bright yellow. Tip: Industrial large tip waterproof & easy to handle, ink comes ready to use and is formulated to fluoresce brightly under longwave ultraviolet lamps. Ink is non-toxic, fast-drying and non-transferable. Ideal for applying onto an already printed surface. Solvent base. 5.25" long (bottom to tip of cap) by 1/2" diameter.