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FLEXO Magazine : May 2012
stores installed process viscometers on its narrow-web flexo- graphic press. The company currently runs 12-hour shifts and produces millions of lottery tickets annually for many interna- tional companies. “ We formerly used a Zahn cup, but there was too much inconsistency,” the lead pressman explained. “Depending on the operator conducting the readings, you’d get different measurements. Sometimes you’d get a thick film or a thin film, and the flow properties of ink wouldn’t be there. We also had pump problems and would get transparent coatings instead of opaque because the ink would be so thin. Once the viscometers were set up, they held their viscosity well. As long as the solvent tanks are full, I can run them all day and not have to think about it.” Print managers must select a viscometer based on their production needs, and this is dependent upon numerous factors, including operator acceptance, consistent measure- ment and control, fit with existing equipment, expected cost savings, and maintenance and repair. The promise of uniform viscosity measurement and control for ink reduction and cost savings will only be acceptable if the long-term excellence of the installation is also cost-effective to operate and service. Modern viscosity control systems feature a viscosity sensor with no moving parts, which is not affected by piping vibration or changes in flow. Such sensors have a small housing de- signed for the printing industry, and new user-friendly software. Viscometers maintain ink formulations at predetermined levels to ensure the economical usage of expensive ink, con- sistent, of course, with the quality of the final product. In summary, as a print manager or operator, the installation of modern viscosity measurement and control equipment will move you closer to the day when you can realize: • New print quality and consistency • A significant reduction in start-up waste • The elimination of rejected jobs by customers • A quick purchase payback due to ink and solvent savings • Less wash-up • Better ink adherence n About the Author: Marc St Georges is the international printing market manager for Brookfield Engineering Laboratories, Inc. Marc has decades of experience in sales and sales network management, including many years of experience in the sales of instrumentation to the international printing community. Technolo- gies discussed in the above article are reflected in Brookfield’s Uno Automated Viscosity Controller. The system includes the AST-100 in-line viscometer – a versatile instrument for a wide- variety of printing and coating applications. www.flexography.org may 2012 FLEXO 57 © 2012, Mimaki USA, Inc. ATL 888-530-3988 BOS 888-530-3986 CHI 888-530-3985 LA 888-530-3987 www.mimakiusa.com EMAIL INFO email@example.com From ideas to presentation 1 white box 2 shrink sleeve 3 metallic label 4 clear bag 5 white pouch 6 clear box 7 metallic box 8 white label 9 clear label 10 metallic bag 11 clear outer wrap The ONE machine for comps, prototypes & samples. Print and die cut (kiss-cut also) on the same roll-to-roll system. Virtually odorless ES3 ink + metallic silver & white. Shelf-quality resolution – 1440dpi with variable dot technology. Use the CJV30 with JetComp film media. See more at www.prooftech.com SILVER ES3 ink for eye-catching metallic effects! WHITE ink for over/under printing on transparent & metallic media. ES3 INK Mimaki CJV30_HPkg_FLX0512_Layout 1 4/16/12 11:22 AM Page 1