RE: In-RIP Curve Adjustments and Densitometry
RE: In-RIP Curve Adjustments and Densitometry
- Subject: RE: In-RIP Curve Adjustments and Densitometry
- From: Jeff Harmon <email@hidden>
- Date: Sat, 16 Jun 2001 01:42:40 -0700
Thanks for responding Thom. Unfortunately -- due to cost contraints of my
clients -- I'm trying to adjust a simulation curve in an older EFI RIP
station running an Epson 5000. That is to say, I'm not adjusting the curve
of a profile on the RIP of the device profiled -- so much of what you say
isn't on target, er, so to speak. The older Epson RIPs don't use custom
profiles of the Epsons themselves, just an internal canned definition; but I
have several clients who don't want AutoFlow or such or a new RIP and want
me to burn sage and dance around partially naked until the Epson matches
their press...
I've print out a CMYK ramp on both devices and am using a Spectrolino with
KeyWizard to bring in densitometric readings. I'll then compare what came
out on the offset that I'm wishing to simulate to what comes out on the
Epson through the offset profile. I'll then tweak the output values in the
curve to adjust the additional distortions the Epson engine is introducing.
This is the process I was wondering was scientifically sound.
I've already done this by eye well enough for production (B+ range) but want
the most accurate, measured way to adjust the curve.
I recognize I could edit the profile (which is what my curve is doing) in
Photoshop with Doctor Pro or another editor using curves (and then some!) as
well. But I'm already on my way with the in-RIP adjustment, so be it!
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j e f f h a r m o n
director
colorhythm
1526 woolsey street
berkeley ca 94703
ph: 510.647.3689
fx: 866.728.6478
email@hidden
http://www.colorhythm.com
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