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Our crayons are a popular item to invisibly mark articles such as currency, tires, paper, wood, metal, glass, etc., for identification and theft detection purposes. They are practically invisible on most backgrounds but highly fluorescent when exposed to a long or short wave UV lamp. We offer white, yellow, and orange options.
Notice: This item can be purchased by law enforcement agencies or private investigators only.
W-PENINV
This convenient pen can be used to invisibly mark most porous surfaces such as paper, cardboard, wood, documents and paper currency. Fluorescent markings become visible when exposed to long or short...
Multiple Options Available
Our Invisible Inks fluoresce a brilliant blue or green when exposed to a long wave ultraviolet (UV) light source. This ink is nontransferable and will not irritate the subject’s skin. The ink can be...
LC-TCMI-2
This liquid lacquer is used for marking coins, coin boxes, tools, and other metallic objects for identification or theft detection purposes. The lacquer leaves an invisible fluorescent mark...
CK-TDMVI
TRITECHFORENSICS' multipurpose Master Visible and Invisible Thief Detection Kit contains the necessary materials required to identify thieves. This kit is provided with a selection of both visible...
CK-TDBI
This economical Invisible Thief Detection Kit contains a variety of invisible thief detection powders and paste, along with other components, to help identify suspects in petty theft crimes. All...