New From Markal-UV. Invisible marks that illuminate as a bright blue mark when viewed under an ultraviolet or black light.

When security or quality control checks are demanded, use the New Valve
Action Paint Marker-Invisible UV. The newest permanent paint marker
from Markal makes clear, invisible marks that illuminate as a bright blue
mark when viewed under an ultraviolet or black light.
FEATURES:
• Ideal for identification marking such as security, quality control,
tamper-proofing and anti-counterfeiting
• Perfect for variety of non-porous surfaces: metal, plastic,
glass, ceramic, rubber and stone
• Fast drying, xylene-free paint conforms to safety standards
such as California Proposition 65 and EPA HAPS and
SARA 313
• Marking temperature range:
-50oF to 150oF (-46oC to 66oC)