Ink is completely invisible in normal light; very bright under blacklighted conditions.
Full size marker.
Precision fine point tip.
Does not wash off easily.
Imported from USA.
These UV ink markers are completely invisible in normal lighting,
but illuminate incredibly bright under UV blacklight! Use these
ink markers to implement security procedures, secretly mark your
valuables, write hidden messages, artistic application, or just
for plain fun! Each marker is full of our special blend of UV
ink, so you get long lasting UV special effects.
DirectGlow Set of 3 Invisible UV Blacklight Ink Marker Blue Red Yellow