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FLEXO Magazine : June 2008
FTA TODAY development of measurement protocols for caliper, gloss, brightness, spectral color and fluorescence and opacity. If success- ful in developing a correlation between optical and physical properties of backing materials and color differences, the project team will present their finding for con- sideration as a CGATS and ISO standard. Updates are planned at future FFTA con- ferences and in association publications. Rodrigo Yamaguchi of MacDermid, ex- plained that research supports claims that plate resiliency is critical to minimizing press bounce issues. Variables to consider are plate, tape, speed and impression. Press trials concluded that higher resilien- - JUNE 2008 FLEXO cy plates will help maximize press speed, while increased impression may hide bouncing. Negative effects from strong impression, specifically, dot gain and halo- ing, must be controlled. In a presentation on near-neutral cali- bration,Jay Sperry, Clemson University, summarized his experience and experi- ments, then recommended that flexog- raphers work step-by-step through the process. "Certify ink using proofing, mea- suring and analysis based on ISO 2846-5," he said. "Optimize the printing system- anilox, plates, substrate, run sequence. Establish solid color definitions. Create and apply dot gain curves to achieve neu- tral print density. Publish target colors, measurement protocol and reporting for production." Dr. N ona Woolbright, Clemson University, addressed the human percep- tion of "good color." She indicated that her research involving the viewing of two samples by one group of people in ambi- ent light and another in a light booth, concluded that "Substrate is a factor upon perceived effectiveness of calibration method." Tests conducted involved six substrates, but in all cases white poly and cast coat prevailed and ranked consistently high, regardless of viewing condition and calibration method. Stefano d' Andrea outlined the ATIF-Italy's FTA-method for ap- plying standardization to flexography. "Standardization means that the full www.flexography.org process, from prepress and plate making, inks, substrate, consumables, etc., up to final printing, is really kept under control so that results become predictable, con- sistent and repeatable," he said. "Only in these conditions, is it possible to proceed to press characterization and generate an ICC profile." His conclusion, reached after developing an ATIF Check-up Procedure for Flexo Presses, based on results achieved on 10 similar pressruns in seven different plants, "Global buyers expect global results and global production por- tability. Standardization does not flatten quality. In fact, the spirit of standardiza- tion should become a real point of refer- ence among worldwide flexo users." . FFTA FORUM 2008 COMMITTEE Forum 2008 Chairman Scott Gilbert, Smurfit-Stone Container Corp. Forum Vice-chair Mark Mazur, DuPont Packaging Graphics Prepress Session Chairs Po Cheung, Smurfit-MBI Gerry Sondej, SCI Canada Newspaper Session Chairs Bill Wagenbaur, Wichita Eagle Jean Jackson, Allison Systems Corp. Business Management Session Chair Dave McConnon, The Meyers Printing Companies Emerging Technologies Session Chair Jason Barrier, Printpack Flexo 101 Session Chair Dan Collins, Pliant Corp. Faster, Better, Cheaper Session Chairs Jarrett Westman, Tetra-Pak Rick Mix, All Printing Resources FIRSTfFQC Session Chair Jean Engleke, Alcan Packaging Sustainability Session Chair Phyllis Kerr, Global Packaging