About UV markers:

Ultravioletmarkers invisible markers (also called "invisible ink") contain UV ink which isn't visible under day light.

Ink visible under UV light. Often are used for security marking of property. With UV marker very easy to deter theft and to prove ownership.

UV pens fotos:

uv marker

UV markers on YouTube:

 

(c) 2002 - 2016. SpyArsenal.com. All rights reserved.