[Printers] Epson Acualaser C8500 dots = XEROX

[Seth David Schoen]

Eduardo Luís writes:

> Hi again....
> 
> I allready saw that the Laser Printer Epson Acualaser C8500 pattern follows
> the same encoding scheme as XEROX DocuColor.
> But I think that my printer (or this model) doesn't print date and time.
> I have a picture of my scan at:
> http://eluis.no-ip.com/printerdots/C8500_Sample1.jpg

That's fascinating.

It uses columns that are disused on the DocuColor and suggests that
this may be a broader standard of some kind, of which different
printers use different subsets.  It does seem to match on grid and
parity.  (I have some AcuLaser samples in my office, so I can take
a look at those for comparison.)

One important question is whether you can get your printer's serial
number and whether the serial number encoding matches up.

Do any of the coulmns to the left of column 10 change if you print
documents on a different day?

-- 
Seth Schoen
Staff Technologist                                schoen at eff.org
Electronic Frontier Foundation                    http://www.eff.org/
454 Shotwell Street, San Francisco, CA  94110     1 415 436 9333 x107