Idealink Curve - How far out can it correct?

Michael_Eddington · October 27, 2008, 3:12pm

If the process is stable, IDLCurve shouldn’t have a problem getting you good compensation curve for gray balance. But a few things to consider…“standard densities” are not a measurement of color. How are your primary solid ink Lab values conforming to standard Lab values? Knowing where this lies, and how close the secondary overprints are to published value will give you insight into how far you can move primary ink density toward optimum Lab values for both primary and secondary. Once your targets are established, you can then establish compensation curves for gray balance (as well as derive target density values for production), but again, the stability of the device is thedeterminingfactor for success, rather than a densitometric value. Averaging is recommended.

Mike

On Oct 27, 2008, at 10:58 AM, prepper wrote:

My question is how far out can your gray balance be at standard densities and the software still be able to create individual cmy curves that will result in gray balance?

Reason I’m asking is we find gray balance on press with linear plates at 148-135-100 cmy, and used one curve. Now we seem to be having trap issues with the CM and would like to bring the cyan density down but when we print the grayfinder target at standard density 145-145-100 cmy it is way too red overall to find a gray patch on it that’s useable to plot individual curves manually. Can anyone tell me if there is a way to do this manually in this case or if the software will take care of this for me?

I need to be able to do it manually so press can go back to standard densities and maybe get rid of CM trapping problem, or be able to justify the cost of the curve software to do this for me if no way to do it manually?

Thanks

Terry

Michael Eddington
QA Manager/G7 Certified Expert
North American Color, Inc.
www.nac-mi.com
www.nac1to1.com
www.photo360.com

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