softproofing 8color in PS
softproofing 8color in PS
- Subject: softproofing 8color in PS
- From: email@hidden
- Date: Sat, 6 Dec 2003 08:07:52 -0500
I've been lurking and learning a lot from this excellently informative
group, now I have a question I hope you can help with.
We are using a Roland FJ400 with their canned and one custom profile
they made for us. We are getting for the most part excellent results,
but experience a few problems with some areas blocking up and printing
with reduced detail as well as some gradients getting abruptly "cut
off".
Adobe RGB 98 is our working colorspace and the printer rip takes RGB
files.
If in photoshop we use the softproofing feature (cmyk) these same areas
give gamut warnings on screen. If we reduce the saturation till the
gamut warning disappears, the symptoms are improved, but at the expense
of color rendition.
I speculate that the 8-color ink epson has a greater gamut than CMYK
and that I should softproof with a profile for the Roland and the paper
we are using, but in the proof setup in PS I cant see the particular
profile. PS is in OSX, but the Rip for the Roland has to run in OS9
(not classic). Other profiles for the Roland do show.
Examining the profiles in Apples Color sync utility the Roland profiles
show errors like "Header white point is not D50. " and "too many input
channels" (or output channels) - but then it's an 8 color printer....
Questions:
Am I correct in thinking that I can softproof on screen using the
profile for the printer / paper combination ?
Does the profile need to be OSX specific ?
Is there an alternate method.?
Perhaps converting to a smaller gamut colorspace before sending it to
the printer rip ?
Pressing my luck a bit I'll ask one more question....
The Roland rip is "proprietary" and only seems to work using profiles.
We set out to try to make our own profiles by printing a target, but
when the icc correction was turned off the Roland put out way too much
ink. A rip to linerize etc is beyond an artists budget..
( for each profile there is in the rip a GCR option - Total ink limit,
black ink start, black ink limit )
Question:
is there a profile I could use that does not translate any color
values, so i can print a target ?
or
a way to edit a profile for a similar paper that has by testing shown
to be almost good ?
Ulf
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