Published in 60th Annual Technical Association of Graphic Arts Technical Conference Proceedings: San Francisco, CA, March 18, 2008. Copyright © 2008 TAGA - Technical Association of the Graphic Arts.
The purpose of this study is to apply the G7 method for calibration on a four-color flexographic press. G7 controls and calibrates a press using colorimetric values rather than tone value increase. Two press runs were completed to calibrate a flexographic press. The first press run provided data for creating a control curve called Neutral Print Density Curve (NPDC) for the press run with a specific combination of inks and substrate. The printed P2P target was used to build the RIP curve and cutback the digital file. The calibrated plates then ran for the second time to check the efficiency of calibration. By applying the NPDC curve, the second press run produced better neutral colors visually.