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FLEXO Magazine : August 2010
Registration Control FIRST says, In order for a job to print successfully, the printer must achieve and maintain both color-to-color registra- tion and print-to-substrate registration throughout the pressrun. Many variables influence print register such as: • Location & Movement of the Web. • Web Tension (stretching). • Print Cylinder TIR. • Gear Condition. • Plate/Sleeve Mounting Method & Accuracy. • Press Design (CI, Inline, Stack). • Press Maintenance (play in the decks). TEST says, The FIRST book gives you a description of the typical variables that influence registration but often press operators overlook problems that they may have created for themselves. On in-line presses, it is important to remember that any type of web movement will influence registration. This could be something as simple as the air velocity of one or more of the dryer units, or a poorly tuned die station. On wide web CI presses, a heavy ink buildup on your CI nip roll can easily cause your registration to be off on one side of the web and not the other. Think about that before you send the job back to the plate mounter. For more information, see Section 22.2 (Page 249) of FIRST 4.0. What is FIRST The intention of FIRST is to provide all participants in the flexographic repro- duction process with a common set of guidelines, tutorials and data that can be used as communication and production tools. The aim of FIRST is to create a common set of specifications and communica- tion protocols for the industry. This platform should establish common com- munication and identify the responsibility of the provider(s). To order FIRST, call 631-737-6020 or visit www.ftastore.com. What is TEST TEST is the educational arm of the Flexographic Technical Association. The aim of TEST is to align all of the training materials available through the FTA with the guidelines, tutorials and data identified in FIRST. TEST is focused on implementing new learning methodologies to reach out to a larger portion of the FTA membership. For more information on TEST, visit www.flexography.org. Press Buyer’s Guide Press Buyer’s Guide ’s ’s August2010_mech.indd 31 8/13/10 7:45 AM
Sustainable Summer 2010