Yahoo Groups archive

Digital BW, The Print

Index last updated: 2026-04-28 22:56 UTC

Message

Re: dpi and stuff

2004-11-13 by Jerry in Houston

This thread has been very informative for me.  I use a
1280 using the MIS UT2 CFS ink system and PS 7.0.1.

I went into PS and noted that I routinely size my
images to their final print size using the PS Image
Size function at a final resolution of 720ppi and the
resample set at Bicubic, before sending to print using
the Epson driver.  In the Epson driver I routinely
print at a final print resolution of 1440 dpi.  I am
thinking that since the image is already set at 720ppi
in PS there is no need for the driver to resample and
it will remain as PS left it before applying the
1440dpi.  Am I right in this?

Jerry in Houston


<<"Yes, when you send an image at 600ppi to an Epson 
1280 printer using the Epson driver, your image is
upsampled to 720ppi by the driver using Nearest
Neighbour interpolation (unless the driver has other 
options such as DCC which use a better interpolation).
If you sent it an image at 1200 ppi (half the size
without resampling) it would be downsampled by the
driver to 720ppi. Then the driver would turn the image
into dots and print at whatever
quality(printer resolution) you chose (720,1440,2880, 
5760dpi).">>

Attachments

Move to quarantaine

This moves the raw source file on disk only. The archive index is not changed automatically, so you still need to run a manual refresh afterward.