At 10:51 AM -0700 6/28/05, Captain wrote:
“You could potentially hit density and dotgain for SWOP right on the money with your inkjet and have a poor vusual match”
Yeah…I found that out the hard way!!!
So since my proofer/Rip setup is not SWOP certified should I use these numbers that should be close to my set-up as a base-line?
As for my profile set-up…printer profile is my created epson profile and CMYK input profile if SWOP or GraCol. This is the way that Wasatch sets it up…
Maybe I am creating my profiles wrong with regards to UCR, GCR, black point start, etc.? I am using Gretag software and hardware.
the density values that you are seeing from the inkjet bear very little resemblance to those on press.
It is also pretty much a myth that the density values on inkjet should match those on press.
It seems like they should but the ink colors on the inkjet are different enough from press inks that they don’t match up with the filters in a densitometer the same way and so they don’t mean the same thing (similar numbers may look quite different)
For effective RIP setup you should set your channel end-points so that the resulting gamut is larger than that of the press you are trying to simulate but not too much larger. While it is tempting to try to get all the gamut possible from an inkjet, the edges of the gamut can be pretty weird due to inkjet ink behavior.
- set effective end points
- then build a good inkjet profile
- test press->inkjet transform in Photoshop (don’t try the RIP’s color conversion until you know the profiles are good)
- then move profiles to RIP and try transform there
density is effective for control on press. It rarely has a role to play in proofing on inkjets.
o Steve Upton CHROMiX www.chromix.com
o (hueman) 866.CHROMiX
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