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FLEXO Magazine : June 2013
of such work requires both open structure cell geometry and lower line count engravings to handle larger particle sizes, as well as to accommodate higher viscosity materials. CONSTANT CHALLENGES Optimize the anilox roll for consistent, repeatable print results. Extend product life, increase productivity and reduce operating costs. Scorelines (grooves in the engraving) or pickup lines (mate- rial built up on the engraving lands) are common occurrences that can be helped by optimizing blade setting and using filters and magnets to remove metal fines, paper dust, dried ink, etc, UV ink spitting or misting is still a challenge that can be helped by some doctor blade configurations and specialty anilox engravings that have more open structures that help the ink flow. Praxair NovalineTM UV Gold and IST engravings can reduce or eliminate ink spitting. LIFE-EXTENDING MEASURES Anilox rolls that start with a hard, dense ceramic coating as the foundation, generally have a longer roll life as the coating delivers good wear resistance and consistency of the engrav- ing. Process anilox rolls with low volume can have a shorter life as they have a small volume window to deliver the thin ink film that will cover the substrate and have minimal dot gain. Most anilox rolls can last several years if they are cared for and maintained well. Today, the vast majority of rolls are replaced due to physical damage to the roll face or edges and the engraving. To maximize roll life, work with your doctor blade suppliers to optimize blade materials and blade settings along with practic- ing good housekeeping practices. Rolls should be clean right after use to eliminate ink drying in the cells or linking with other ink systems. Caustic cleaning systems can be a concern for sensitive aluminum and sleeve applications. Automatic off press cleaning systems help greatly, especially when the cleaner is optimized for the ink system and safe for the roll base. n About the Author: Jean M. Jackson is sales manager, North American Printing, Praxair Surface Technologies Inc. She is a member of Flexographic Technical Association’s Hall of Fame, inducted in 2007. She is a past member of FTA’s Board of Directors and its Foundation’s Board of Trustees. Her involvement with FQC extends back to 1994, and her com- mitment and contributions to FIRST’s continued development align with that program’s inception Praxair Surface Technologies, founded in 1946, employs nearly 125,000 people and specializes in printing, industrial coating and aviation. It operates from 31 global locations, including seven anilox roll plants on four continents. It laser- engraved the first laser engraved anilox roll in 1981. www.flexography.org June 2013 FLEXO 55 Safety Frequent roll handling can increase safety hazards such as back injuries and pinched fingers. Praxair’s long-lasting ceramic covers extend the life of the roll and reduce the number of times it has to be removed and sent out for repairs. Less handling means fewer potential injuries. Flame Treater Rolls, too! The same benefits of corona rolls are available in Praxair’s ceramic covers for flame treaters. How to Get Started. Contact Us Today. Ask a Praxair printing specialist to recommend the best engraving for your application. Call +1 704 921 5400 or send us an e-mail at firstname.lastname@example.org www.praxair.com/printing Building Value Our goal is not only to meet your expectations but also to exceed them with empowered teamwork and continuous process improvement. We are dedicated to building value through management techniques such as Six Sigma and Lean initiatives. Industrial coatings today are high-tech solutions that Praxair Surface Technologies matches with high-tech research and development. At our global headquarters in Indianapolis, Indiana, USA. and at other Praxair laboratories around the world, our experienced scientists, engineers, and technicians are committed to providing the most advanced solutions to your coating needs. Other Praxair wear and corrosion solutions for the plastics and printing industries include: • Chill rolls • Calendar rolls • Flame treater rolls • Extruder dies • Feedscrews for extrusion and die making • Regrind knives • Ultrasonic horns • Slitter blades • Laser-engraved ceramic anilox rolls • BTG DUROBLADE® ceramic- tipped doctor blades Praxair Surface Technologies, Inc. 1500 Polco Street Indianapolis, IN 46222 USA www.praxairsurfacetechnologies.com email@example.com Telephone: +1 317 240 2500 Fax: +1 317 240 2255 © Copyright 2010 Praxair Technology, Inc. All rights reserved Praxair and the Flowing Airstream design are trademarks or registered trademarks of Praxair Technology, Inc. in the United States and/or other countries. Other trademarks used herein are the registered trademarks of their respective owners. The information contained herein is offered for use by technically qualified personnel at their discretion and risk without warranty of any kind. Printed in the United States of America 05-2010 Printed on recycled paper P-10342 Brazil Pinhais +55 (41) 3661 6200 China Changzhou +86 5198622 1778 Italy Novara +39 0321 674811 Japan Kozuki +81 79088 0564 Switzerland Meyrin +41 22 989 8989 United Kingdom Swindon +44 (1) 793 512 555 United States Charlotte, NC +1 704 921 5400 Experience the science behind the service with Proline® anilox rolls Praxair Proline® laser engraved ceramic rolls deliver quality your printing operation can depend on. Whether you need extended life, improved ink laydown, better opacity, or more repeatable print results, Praxair Proline® series of engravings is for you. Our ART (Anilox Reverse Technology) and REV (Revolutionary Engraving) cell shapes and configurations continue our history of technical innovation to the flexographic industry that began with the introduction of the first laser engraved ceramic roll to the printing industry almost 30 years ago. You can see the results every time the press rolls. Improved printing quality. Consistent reproduction. Reduced maintenance downtime. And, better profitability. www.praxair.com/printing Call 1-800 -234-3131 for information on how we can help your business.