Digital BW, The Print

> I hope to run such tests on the 2200 soon.

Thanks for the very informative posts.  I look forward to reading the 
results of your tests with the 2200.

Mike Chaney, author of Qimage and Profile Prism, writes the following 
in a thread on this subject in dpreview:

>>>
I've proven this time and time again, and am happy to do it here one 
more time just to take some weight out of the myth that inkjet 
printers can't "realize" anything above 240 PPI. A typical example is 
at the URL below. The image on the left was the original resampled to 
360 PPI and sent to an Epson 2200. The one on the right was the same 
original resampled to 720 PPI and sent to the same printer with all 
other settings identical. The prints were scanned at 1600 PPI to 
reveal the fine detail. Yes, you do have to look closely at the 
prints to see the difference with the unaided eye, buy you can 
definitely see it. Now tell me that there's no benefit to resampling 
anything higher than 200/240 PPI!

http://www.ddisoftware.com/testpics/360v720.jpg 
<<<

Source:
http://forums.dpreview.com/forums/read.asp?forum=1003&message=4375134


And Chris Bair, of inkjetart.com, conducted similar tests on the 7600 
here:

http://www.inkjetart.com/tips/ppi/index.html

... where he remarks: 

"The question comes up every so often: "what ppi should I have on my 
source files?" We were printing some sample prints on our 7600 to 
send out to people and noticed that the text on the sheets had 
strange jaggies, plus the photos had nearest neighbor resizing 
artifacts on the print, but looked perfect on-screen. We finally 
realized our input resolution (300 ppi) was causing the problem. I 
created two PDF files to test which is the best resolution, you can 
find them Here and Here. You can also get the TIFF Files I used to 
make the PDF files Here and Here. [See above link.] Inside you'll 
find different resolution patches designed to test to see what 
resolution the printer is truly looking for."

"You'll notice that some resolutions have major resizing artifacts 
when printed (all look nasty in Acrobat reader), while others get it 
dead on. We found that 360ppi was perfect for our printer (and likely 
the rest of Epson's printers), 480 had significant artifacts (some 
people claim that 480 is the optium resolution for desktop printers) 
and 180 was also fine."

Dan