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FLEXO Magazine : June 2009
FTA TODAY Paul Lodewyck Mark Mazur Jean Jackson Timothy Gostick Projects and Planning FQC Session Reports Progress & Possibilities TA’s FQC (Flexo Quality Consortium) Committee is tasked with researching and conducting experiments aimed at improving fl exographic printing. Paul Lodewyck (Flint Group), who chairs the committee, also chaired the FQC Session at Forum 2009, alongside FTA Hall of Famer Jean Jackson (Praxair). The session, according to Lodewyck, is a chance to inform Forum goers about current projects being worked on by the committee and the progress being made, as well as offer other highquality, peer-reviewed technical presentations. It took place Tuesday, May 5 at 8 a.m. After being recognized once again for his recent Hall of Fame induction, Mazur took center stage F to discuss the project of creating a standard data set for wide web fl exible packaging. Mazur fi rst acknowledged Steve Smiley of Vertis as contributing the “brainwork” for the project. The objective, he said, was to create a data set of ISO that could be used for an ICC profi le for wide web fl exible packaging. This, he stated, could lead to more accurate proofs for that segment. Currently, he has data sets from three printers—Hood Packaging, CP Flexible Packaging and ColorMasters LLC. But much more is needed. “We want to know the limitations of the process,” declared Mazur. Lodewyck returned to the podium to recap results of the project on measuring color on transparent and translucent substrates. The problem, as Loedwyck noted, is that these materials are often measured over a backing sheet, which could affect the measurement results. The objectives: To identify characteristics of a backing sheet that impact reproducibility of color measurement, develop data quantifying those characteristics and recommend acceptable ranges for most effective measurement (if any). Current testing concluded that L* values of the backing sheet are very signifi cant, and the characteristics of the substrates are important. Future testing will examine the impact of combined substrate and ink opacity, as well as ink color on results. “We want to know the limitations of the process.” —Mark Mazur, DuPont Imaging Technologies Jackson addressed the audience next, speaking briefl y on a project geared toward repeatable and reliable anilox volume measurements. The experiments will examine two areas: the variation in the measurements taken by a single operator or instrument on the same roll, under the same conditions, and the variability induced when different operators measure the same roll or engraving. Hypothesizing that dot shape will affect the tendency of a plate to show fl uting when printing on corrugated substrates, Timothy Gostick of MacDermid Printing Solutions revealed results of a non-FQC project. Gostick asked, “Why do digital plates fl ute more?” He ran 12 samples at Clemson University using 14 different plates. The factors involved in fl uting were narrowed down to dot surface, steep shoulder angle, deep valley and defi ned edges—summarized in an acronym he playfully called “SAVE.” Sample No. 12 offered the best results and the lowest “F-factor” (measure of the severity of fl uting), even with an increase in impression. Gostick noted that liquid photopolymer plates defi ed these results, and that further testing would be conducted to explain this. Rich Emmerling of Flint Group Flexographic Products closed out with a recap of an experiment conducted to fi nd the ideal combination of plate durometer and compressible sleeves. The results of this project were originally reported in FLEXO’s January issue, page 28. ■ www. f le xography. org JUNE 2009 FLEXO 47 Rich Emmerling
Sustainable Spring 2009