Android printer recommendations

[Tom Buskey]

On Thu, Dec 16, 2010 at 9:52 PM, Dan Jenkins <dan at rastech.com> wrote:

> On 12/16/2010 7:20 PM, Michael ODonnell wrote:
> > > (Anyone know why laser printers seem to only run at 600 DPI? Every
> > > one I've checked (and I've l looked at dozens of models) specifies
> > > 600 DPI as the native resolution. I'm guessing it's something
> > > inherent in the technology, but don't actually have any data.
> >
> >  There's nothing inherent in the xerographic process (ie, using light
> >  to control the amount of electrostatic charge remaining on a
> >  pre-charged surface such that it ultimately determines how much
> >  pigment/toner is delivered to the print medium) as employed in recent
> >  laser printers and copiers that would limit resolution to 600 DPI.
> >  Indeed, I've heard of some industrial quality xerographic printers
> >  that (IIRC) had resolutions approaching 10,000 DPI in at least one
> >  dimension.
> >
> >  Therefore, if it seems that you're enjoying arbitrary restrictions
> >  that always limit you to 600 DPI I'm guessing that they're, um,
> >  arbitrary. Maybe some sort of CYA lowest-common-denominator
> >  phenomenon?
>
> Odd. We sold 2400 dpi monochrome laser printers years ago. (They were
> very expensive then.) I have a half dozen 1200 dpi ones in-house now. To
> be honest, I usually use them at 600 dpi, because there's just not much
> point going higher on simple text output, which is what we primarily do.
> There are LED printers, which are often referred to as laser printers,
> which typically have had a 600 dpi resolution, and been cheaper than
> laser printers. I haven't really paid much attention to the market in
> recent years, as we no longer do much with the printing & publishing
> industry as we used to. (That used to be our bread and butter, but has
> largely evaporated over the years.) So, I don't really know what's
> current, but higher than 600 dpi resolutions were common back in 2000.
> They were in the business class and publishing class market.
>
>
Monocrome printers will have one drum with 1 pass of the paper.  The laser
puts an electrostatic charge on the drum, picks up toner and deposits it on
the paper.

The color lasers generally use 4 colors (CMYK).  That means 4 cycles of
electrostatic/toner.  Some do 1 paper pass, some 4 passes.  Alignement is
critical and that affects sharpness.  Color lasers always seem a bit fuzzy
to me and that's why.
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