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A-11 Desktop Color Primer
Print the files and examine the output. You will likely begin to see a marked
deterioration in output quality at resolutions below 200 ppi, while above 200
ppi the improvement may be very subtle.
Raster images prepared for offset printing may need to be at higher
resolutions than needed for proofing on your iR C2100/2100S.
Scaling
Ideally, each raster image should be saved at the actual size, and it will be
placed into the document at the optimal resolution for the print device. If the
image resolution is correct for the print device, there is no quality advantage
to be gained by scaling an image down to a percentage of its actual size. If you
scale a large image down to a percentage of its actual size, you incur
unnecessary file transfer time because the image data for the entire large
image is sent to the printer. If an image is placed multiple times at markedly
different sizes in a document, save a separate version of the image at the
correct size for each placement.
If you need to place an image at greater than 100% in a document, remember
that the output image resolution is affected. For example, if you scale a 200
ppi image to 200%, the image is printed at 100 ppi.
Image quality
Image resolution
100 ppi 200 ppi 300 ppi 400 ppi 500 ppi 600 ppi