Hi All, and thanks for your replies.
So, I think what I was really looking for was something that works similar to how Curve's virtual press run is described. The environment is digital, Jetmaster 1890, CMYKOV. If I have a source color (given Lab), a known output of that color (measured Lab) and the .icc profile the color was processed through, could I input new values and get feedback on the predicted live output so that I have the best chance of getting the color output needed without multiple iterations - using printer time/materials.
Color Lab will build a test form of variations of a given color and I could then choose the swatch that best matches the target - as long as I have access to the values used for the various patches. This would work fine and probably only require a single print out of the machine.
Of course, there are other considerations when a color does not match as expected. . . but I was looking for a good mallet to whack this particular mole. I suppose if I did color correction in Photoshop in Lab mode on a regular basis I'd have a better mental projection of an outcome. Maybe I should practice this a bit also.
Best, Dan
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Dan Pierce
Abbott-Action Inc.
ATTLEBORO MA
(781) 821-8200
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Original Message:
Sent: 06-20-2019 02:16 PM
From: Mike Strickler
Subject: Target / Result Lab value correction
Dave: Now I am also unsure what Dan is asking for!
Dan: What is the application? Are you trying to improve your printed match to a reference? Is it a conventional or digital device? Is the reference process or spot colors--both? Are you trying to improve your characterization of devices? Improve your process control?
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Mike Strickler
MSP Graphic Services
Original Message:
Sent: 06-20-2019 12:25 PM
From: David Hunter
Subject: Target / Result Lab value correction
Hi Dan,
If this is related to a brand color, then our ChromaChecker software has an iteration capability that allows you to predict what CMYK build is required to create the color (and if out of gamut it will flag it). Then it will allow you to export the predicted CMYK builds in a format that can be ingested by many of the RIPs, then you print, and measure using ChromaChecker Capture software, and it any colors are still off, ChromaChecker will iterate the CMYK builds by considering the original LAB, versus the new LAB and update the CMYK table...
Is this what you are wanting? f so, email me and we can walk you through the steps. Thanks, Dave Hunter <maskemail>david@...</maskemail>
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David Hunter
Principal
Pilot Marketing Group
Forest Lake MN
(651) 717-0590
Original Message:
Sent: 06-19-2019 12:09 PM
From: Dan Pierce
Subject: Target / Result Lab value correction
Does anyone know of a software based tool for correcting L*a*b* formulas to better match a target? - similar in practice to CurveX to adjust tone reproduction curves. I have a Lab target, a Lab formula and a Lab measured result. I could make a couple of "best judgements" and experiment but I thought there may be a tool that will do the calculation, possibly taking into account an .icc profile.