Re: Epson Photo printers - 16 bit?
Re: Epson Photo printers - 16 bit?
- Subject: Re: Epson Photo printers - 16 bit?
- From: email@hidden
- Date: Wed, 16 Jul 2003 10:02:36 EDT
In a message dated 7/15/03 9:21:58 PM, email@hidden writes:
>
Typically, users send 8-bit per channel RGB files (24-bit total) to
>
Epson printers (2200/7600/9600). It *is* possible to send high-bit
>
files (16-bit per channel, 48-bit total) and they print very well. The
>
question is this: Does anyone know if the high-bit files are massaged
>
down to 8-bit files by either the Epson printers or the Epson drivers?
>
(or vice versa?) I.e., Is there an advantage to printing high-bit
>
files to these printers?
>
Its the last question that nails it. If you send a 256 level gray patch RGB
file to an Epson inkjet, you get significantly less than 256 levels of gray,
and a number of reversals to boot. Still impressive, however. If you send a 16
bit file with 512 levels of gray in it (to date I've not created one with more
than that) you don't get any more levels of output than from the 8 bit file.
There are other factors, but edge conditions tend to sacrifice levels for
sharpness, so flat patches should offer the most levels, and of course there
are
color and color blend issues, but RGB gray is a color blend too... so I'll
just
say that I haven't seen any sysytem that was not using multiple gray inks
offer more than 8 bits worth of gray levels in RGB output... and I tend to
extrapolate that to other areas of the gamut as well.
Steve Lawrence would be the list member in a position to confirm details
about inkjet driver functions, but then; he might not be in a position to
comment
on the subject.
C. David Tobie
Design Cooperative
email@hidden
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