Invisible ink is for those thoughts that you really don’t want to share. Simply replace the color ink in your inkjet printer with lemon juice.See How-To for Secret Agents: Invisible Ink Printer Mod for complete instructions. What will HP, Epson, or Lexmark say about their warranty now?
About Mark Mizen
I have over twenty years professional experience in all aspects of photography and digital imaging. I am Chair of the ISO WG5 TG2 committee responsible for physical properties and durability of imaging material and am currently with HID Global working on systems for security printing for IDs, licenses, and credit cards. Previously, I was Director of Digital Development at Creative Memories from 2009 to 2012 and was responsible for the Creative Memories digital products and services. I also established and directed the Creative Memories Technology Center, which evaluated new products prior to product introduction, assisted with production difficulties, and provided technical information to support product sales.
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