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Digital BW, The Print

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Message

[Digital BW] Re: Piezo v. Epson resolution -- was (unknown)

2002-05-06 by Paul Roark

Paul Roark wrote:

>>My resolution tests sure do not show an advantage to
the Piezo driver with
>>respect to the detail that can be printed. See the
scan of test prints that
>>had high resolution line pairs. The image file name
is "Piezo-Epson
>>Resolution Test.jpg."


Della wrote,

>This is simple. Your scans need improvement. ...

The original resolution test files were not scan files, but made in
Photoshop -- no MTF or other image degradation.

The scans of the printed test strips were done on an Epson Expression Pro at
1600 dpi -- way beyond what the printers can do.  The scans agree with what
I saw with a magnifier.

The results were also the same when the dark line density was changed to 50%
as opposed to 100%, for what it's worth.

I might add that I think I produced sharper test prints with an older Piezo
driver.  I think the various attempts to hide the microbanding has reduced
the final print sharpness a bit.

So, sorry, it's not so simple.

Paul
http://www.PaulRoark.com

(PS - I now use a Nikon 8000 film scanner and use an X-Rite Swatchbook for
the curves that I do in-house.)

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