[Printers] Epson Acualaser C8500 dots = XEROX

[Eduardo Luís]

Sorry, i forgot to mention that the serial number MATCHES my C8500...
But the complete serial number has 3 letters before the number on the yellow
dots. But I think that's not important. The main iformation is the rest of
the number.
Tomorrow I will make another printing to see the difference.

But, i'm working on the Epson C1900 and that one looks very very different
and much more complicated.... It seems to use a 24 columns by 32 lines.
That's hard.....

Eduardo Luís
 

-----Mensagem original-----
De: Seth David Schoen [mailto:schoen at eff.org] 
Enviada: segunda-feira, 24 de Outubro de 2005 17:59
Para: Eduardo Luís
Cc: printers at frotz.zork.net
Assunto: Re: [Printers] Epson Acualaser C8500 dots = XEROX

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