X

This website uses cookies.

This website uses cookies to improve user experience. By using our website you consent to all cookies in accordance with our Cookie Policy.

I agree
Learn More
Great Geek Gifts in the Technabob Shop!Get Technabob Daily: Join our Mailing List! | Follow Us: Facebook | Twitter
Awesomer Media Sites: THE AWESOMER | MIGHTYMEGA | 95OCTANE
Follow Us:
Cool Gadgets, Gizmos, Games and Geek Stuff on Technabob

Invisible Ink Printer Hack: Way Too Much Work For Something You Can’t See

by Paul Strauss
Advertisement

If you ever wanted to send secret messages using your computer, you could just embed secret messages in your image files. But if you want to print out hidden messages, you can hack your inkjet printer to print invisible messages.

make_invisible_ink_printer

The guys over at Make: put together this hack where you crack open the cartridge from your inkhet printer and replace they yellow ink with lemon juice. Print anything you want in yellow, and the page looks blank. But apply some iodine or heat the page with an iron, and your secret message will be revealed. Check out the overly complex and sloppy process in the video below:

It’s a huge pain in the ass, and looks really messy, but the results are kind of cool. Of course, you could do the same with just some lemon juice and a paintbrush or Q-Tip, but what fun would that be. This is way more geeky.

You can grab the full instructions from Make: here [PDF file].

Deals in The Technabob Shop



Advertisement

More from Awesomer Media...

Mondo Labyrinth Enamel Pin Set

Mondo Labyrinth Enamel Pin Set

Star Trek: Discovery Gets First Trailer

Star Trek: Discovery Gets First Trailer

XTND Electric Skateboard

XTND Electric Skateboard

Spiral Train 2.0

Spiral Train 2.0

Volvo Broke a Nürburgring Record and Told No One for a Year

Volvo Broke a Nürburgring Record and Told No One for a Year

VW Creates Golf GTI Hybrid for Wörthersee Meeting

VW Creates Golf GTI Hybrid for Wörthersee Meeting