Print resolution
Print resolution
- Subject: Print resolution
- From: "Mark Rice" <email@hidden>
- Date: Sun, 16 May 2004 16:34:36 -0400
Regarding print resolution (this applies to all types of printers, not just
Epson)
Most of the comments about photographic resolution are true, whether the
device is 360 dpi or 720 dpi - the printer makes "pixels" out of a matrix of
dots. Because the inkjet can only produce a dot that is "on" or "off", it
must make a dithered matrix to achieve natural photographic color.
Scan resolutions use to be determined by the old rule of thumb that the scan
should be at least twice the line screen - 300 dpi for a 150 line screen
output. That was because we wanted to achieve a resolution that would
sustain the grain of the film. This rule is no longer valid with digital
cameras, because there is no grain. A digital camera will often work very
well at 1x line screen(150 dpi for 150 line screen)
HOWEVER, all of this becomes invalid when dealing with type or vector art.
Inkjet printers can sustain up to there full resolution (1440 or 2880 dpi)
when producing type or vector art - type and vector art will be extremely
sharp when using the full res of the equipment. This also applies to
continuous tone printers - on a Lambda, for instance, 200 ppi may be just
fine for photographic images, but if you are ripping type with the image, it
is essential to use 400 ppi.
Mark Rice
212.655.9395
email@hidden
www.zero1inc.com
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