La-Co 97054 UV Valve Action Paint Marker, Visible Blue, 48 Pack

FEATURES: • Makes clear, invisible marks that illuminate bright blue when viewed with an ultraviolet or black light • Invisible paint formula is ideal for security, theft-prevention, and quality control • Fast drying formula reduces smearing • Dura-Nib medium bullet tip resists wear to provide long marking life • Durable metal barrel and clip cap reduce breakage and stores easily in pocket • Marking range: -50°F to 150°F (-46°C to 66°C) • Made in U.S.A. The UV-visible Valve Action makes an invisible paint mark that glows bright blue when viewed with a UV or black light, making it ideal for security, quality control, tamper-proofing, and anti-counterfeiting processes. The permanent invisible liquid paint dries quickly to provide long-lasting, weather- and wear-resistant marks.