Invisible Fluorescent Crayon - YellowThe Yellow Invisible Fluorescent Crayon from Sirchie, is an easy, convenient and economic method of marking and tracking evidence and other objects. The crayon is made of unique UV-responsive material that invisible when applied to surfaces, but shows up a brilliant yellow when exposed to ultraviolet rays such as black lights. The crayon will mark virtually any surface, regardless of how porous, or rough the surface is or what material it is made from. Track money, cardboard, clothes and anything else that may help catch a criminal. Because of its unique chemical composition, no markings are visible to the naked eye regardless of environmental conditions.Sirchie UV738 Specs
| Completely invisible to the naked eye | | Shows up fluorescent yellow under UV lights | | Compact and easily carried | | Ideal for discreet item tracking | | Sold individually |
Sirchie SKUs
UV738 Sirchie UV738
Invisible Fluorescent Crayon - Yellow
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