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What You Don't Know About Colour Laser Printers... - What You Don't Know About Colour Laser Printers...
Mon, April 19 2004 | 10:23PM | PermaLink Feedback?
Well this is certainly interesting news, colour laser printers apparently print hidden serial codes on each printed page! PCstats tested the story out using a simple blue LED and a colour laser printed piece of paper from a local copy house. Low and behold, the full surface of the page is covered with tiny dots which show up under the blue light, even areas which are completely white to the naked eye. Below is a picture of the paper, and the dots are clearly visible on the darker areas but remain invisible to the naked eye. We also tested a colour print out from a Samsung CLP-550 printer, but nothing was visible under the blue light, so perhaps this marking technique is only employed by professional copy equipment companies?
Says the PCworld article; "The dots' minuscule size, covering less than one-thousandth of the page, along with their color combination of yellow on white, makes them invisible to the naked eye, Crean says. One way to determine if your color laser is applying this tracking process is to shine a blue LED light--say, from a keychain laser flashlight--on your page and use a magnifier."

Hmm, a higher end version of Windows, Office coming soon? Did you hear about that big Cisco flaw? Well now the company has gone to court to silence the expert. Intel's next generation Xeon processor is derived from the Pentium M. Heh, tech poachers, that's a neat term. What do you think of the Google/Microsoft employee spat?

Original URL, circa 2004:,aid,118664,00.asp

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