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FLEXO Magazine : July 2014
» An ECI chart or similar, meant to produce a full color profile from the respective color readings (this proof printing must be considered as a separate print job) » The DFTA Print Control Strip for calculating the measure- ment information for a full color profile from only a few color readings (may be run alongside a regular job and thus causes hardly any extra cost) • Generate and verify press color profiles and proofing profiles using either: » Measurement data from the aforementioned ECI test chart » Measurement data derived from the DFTA Print Control Strip The DFTA Technology Center is currently busy developing a soft- ware tool that carries out and eases the judging of the five aforemen- tioned steps. Concentrating on gray balance for the colored process inks C, M and Y with the G7 approach is highly plausible and may yield substantial benefits in technical and economical respects. Gray balance does not deserve to be shifted away from our technical focus; rather, it’s the modern workflows using digital color management that require a sta- ble balance in the target print process. Adhering to gray balance eases and stabilizes these workflows significantly. However, the sheer technical approach of evaluating the particular combination of halftone tints that neutralize one another, as is sug- gested by G7, may be optimized using the software tools developed by the DFTA Technology Center. The user may take five steps to optimize the printing process there- after. At the end of the day, they will wind up with a stabilized print condition with the respective color profiles or digital proofing profiles as an add on, which provide the predictability for the later print results as long as the print conditions are held constant. This may as well be considered a house standard, which, due to the presence of contemporary color profiles, may be plausibly communicated back to the customer. This, in turn, may bind the customer through enhanced trust in flexo’s predictability. n About the Author: Dr. Martin Dreher is the scientific leader of DFTA Technology Center in Stuttgart, Germany. He spent a portion of his career working with DuPont Cyrel as technical application specialist and as team leader on the Cyrel team. He has also worked as a professor at the Hochschule der Medien in Stuttgart. He has written several trade articles. Image 3: Examples for contemporary gray balance test targets that enable calculation of the gray balance from a limited number of color readings “Gray balance does not deserve to be shifted away from our technical focus; rather, it’s the modern workflows using digital color management that require a stable balance in the target print process. ” 50 FLEXO | JULY 2014