On Mon, 31 Jan 2005, Tony Duell wrote:
> > Color laser printers output a serial number indicator of some sort
> > by a near-invisible pattern of yellow pixels overlaying the
> > printed image. I imagine it's not 100% reliable but apparently
> > it's been in place for some time.
>
> If that's true, it's a darn good reason to use classic printers :-)
>
> If I bought a printer and found it was puting stuff on the paper that was
> not specified by the input data, it would go straight back to the shop as
> being defective. Period.
If I remember correctly Xerox has been doing this over over a decade,
perhaps longer.
--
Sellam Ismail Vintage Computer Festival
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Received on Tue Feb 01 2005 - 13:58:34 GMT