This invisible ink can only be detected under black light.
The UV Marker's invisible, opaque, dye-base ink is only seen when placed directly under a black light. This is great for marking surfaces with information that will not be visible in normal light.UV Marker Features:
-3mm replaceable rounded bullet tip
-Marks on plastic, glass and nonporous surfaces
-Excellent for security applications
-Detectable by UV light
-Drying time: 45 seconds to 1 minute