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IR Ink

2009 May 29, 9:01"These inks are completely invisible to the human eye yet can be seen by using a device which can see in the infrared range - such as our modified cameras and camcorders. These inks do not fluoresce in the visible range, cannot be seen with ultraviolet lights and cannot be seen by the human eye alone." Via and not via .PermalinkCommentsir ir-paint ink purchase
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