Stealth iX Ink - HP 95CiX (C8766WN) - Invisible Ink Replacement for Color Cartridge Stealth UV content is completely invisible until exposed to UV light source. Stealth UV barcodes are completely invisible but can be scanned, registered, and validated using a UV scanner. Add a layer of cutting-edge and uniquely specialized security & protection to anything that can be passed through a printer. For best results both the black and the color cartridge would need to be replaced. Use Stealth iX Invisible Ink Enhanced Paper for a high quality print out. Use Stealth iX Invisible Ink Display Lights for the best viewing experience. Click/Copy Paste the link for a video demonstration of print results: http://www.youtube.com/user/StealthInkjet?feature=watch