Color Reproduction Optimization: A Study of Current Technology & Practice for the Flexographic Printing Process


Document ID: 
Li-Wen Chen, and Dr. Nona Woolbright


Digital, Non-Member: 
Photo, Member: 
Photo, Non-Member: 


Accurate color reproduction is a critical concern in the printing industry. Over the years, technological improvements continued to make color reproduction predictable and reduced difficulties experienced in the industry. G7TM is a proposed calibration method for commercial offset lithographic printing that was developed to support the GRACoL7TM specification; it also suggests improved color matching across media and printing processes. The goal of G7TM is to match appearance in which gray balance is one of the most vital metrics of visual appearance (Hutcheson) across various media. Therefore, when G7TM calibration is used for any print reproduction process, the appearance of the color reproductions from different devices should "appear" the same. The printing process used for this study was flexographic corrugated direct printing, using the G7TM calibration methodology on a Bobst 160, sheetfed corrugated printing press. Fifteen samples were randomly selected for data analysis. The results showed when G7TM calibration methodology was applied to the corrugated printing process using standard inks and optimized material combinations the color reproduction metrics analyzed were close to the standard G7TM condition. Neutral gray was achieved when G7TM calibration methodology was used in the corrugated printing color reproduction process.

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