Slashdot Mirror
Xerox Develops New Way to Print Invisible Ink
scott3778 writes "Xerox said on Wednesday that its scientists have perfected a new method for printing hidden fluorescent wording using standard digital printing equipment.
According to the company, the discovery paves the way for customers and businesses alike to add an additional layer of security to commonly printed materials such as checks, tickets, coupons, and other high-value documents.
The hidden fluorescent words and letters show up only under ultraviolet light, said Reiner Eschbach, a research fellow in the Xerox Innovation Group, and the co-inventor of the patented process. What's more, the method for printing them doesn't require the use of special fluorescent inks."
Here's a pic of it in action:
Don't trust a bull's horn, a doberman's tooth, a runaway horse or me.
Printing invisible ink is pretty nifty, but what they don't tell you is that their standard toner will need to switch from CMYK (cyan, magenta, yellow, black) to CMYKL (cyan, magenta, yellow, black, lemon juice).
How do you tell when you're out of invisible ink?
Yeah, sure, but why bother?
We used to have a Bill of Rights. Now, with the rights gone, all we have left is the bill.
As long as they accept my invisible credit card, I'm fine.
We used to have a Bill of Rights. Now, with the rights gone, all we have left is the bill.
Stuff starts showing up on your printouts!
Is it just my observation, or are there way too many stupid people in the world?
Actually, it works like this:
Step 1:
Step 2:
Step 3:
Step 4: Profit!!!