Re: Compression, encoding, entropy

From: charlie strauss <cems_at_earthlink_dot_net>
Date: Mon May 03 2004 - 00:09:31 CDT

Are thermal printers not being considered? Seems like they would surely win on speed, cost, and relaibility. They are available in fan-fold and cut-sheet models that can print on firmer card stock than the conventional roll-fed models. I have read though i not investigated that they can be of archival quality.

 Another very reliable printer type is dye-sublimation or wax-ribon style thermal printers. Usually these are modestly expensive printers prized targeting the high end color photo market, but there also black and white versions. for OVC use they could be attractive because the dont have jets to clog or messy tonner issues. They are 100 % dry usually using a dry film.

as for printing 2-d barcodes on unsophisticated printers, have a look at the post offices web site. You can buy e-stamps and print them at home on ordinary printers. They must be quite robust. You also find them on lots of avery-labels used on packages.

-----Original Message-----
From: Arthur Keller <arthur_at_kellers_dot_org>
Sent: May 2, 2004 10:11 PM
Subject: Re: Compression, encoding, entropy

At 12:44 PM -0700 5/2/04, Alan Dechert wrote:
>Right. And while we're at it, we need to add printing to the list of
>research questions. The testing we've done so far tends to indicate minimal
>requirements for the printer when using 1-d Code128 barcodes. Although I
>tend to think inkjet printers may not be the best way to go (lasers are much
>faster and toner cartridges are better than inkjet), I was able to print
>perfectly readable barcodes on my 6-year old HP Deskjet. The 1-d barcodes
>came out fine on 300, 600, and 1200 DPI laser printers. We have not done
>any testing printing 2-d barcodes so we just don't know enough. It seems
>likely 2-d barcodes will have more demanding requirements for the printers.
>So it might be that both the printers and the readers will be more
>expensive. We just don't have enough information to make an informed
>decision on this right now.

One advantage of using inkjet printers is that the cartridges are
usually cheaper than toner cartridges for laser printers. It then
becomes affordable to use a fresh cartridge for every printer for
every election. That reduces one of the potential causes for failure.

Best regards,

Arthur M. Keller, Ph.D., 3881 Corina Way, Palo Alto, CA  94303-4507
tel +1(650)424-0202, fax +1(650)424-0424
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Received on Mon May 31 23:17:03 2004

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