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FLEXO Magazine : September 2013
Q: Would the results have been more dramatic if viscosity was optimized for plate and tape? A: Our Design of Experiment held all variables constant other than plate and tape. We selected a process magenta ink and our testing protocol specifies monitoring and controlling ink viscosity during the pressrun. This is extremely important to monitor and control ink viscosity during the experiment to en- sure consistent results. In the context of an optimization trial in a production environment, once the optimum plate and tape variable are identified, optimizing ink viscosity for the plate and tape package could further optimize the print result. Q: Can you define medium and hard durometer for plates used in testing? A: The plates used in our experiment were as follows: me- dium durometer was 43 Shore A and hard durometer was 69 Shore A. Q: For the tape/plate tests—Were the inks used for determin- ing density consistent? Were they ISO compliant? A: The ink we selected was a typical surface print process magenta ink and was the ink used by our test location. Yes, the ink used for determining density was consistent. We had a very diligent protocol to monitor and control ink viscosity dur- ing the experiment. All testing was completed in one pressrun with the same lot of ink. Q: Considering that tape density does not always correlate to compressibility based on materials, open or closed cell and tape manufacturer, is there a device you would recommend to measure tape compressibility to verify the tape? A: This is true, tape density does not purely correlate to compressibility. The print result depends on the material and physical properties of the foam mounting tape. There is a complex relationship between the material and physical properties and the resulting performance. There are a num- ber of tests that are used to characterize the performance of a foam mounting tape, but there is not one simple test that www.flexography.org september 2013 FLEXO 21 CUSTOM SOLUTIONS ARE STANDARD FOR US Our team of application specialists select from a wide range of facestocks, adhesives and liners to provide solutions for your most challenging labeling applications. Acucote’s Business Development Team has created a streamlined, customer-focused process to recommend material combinations that satisfy specific applications. The team’s innovative thinking and connections to raw materials suppliers allows them to develop customized solutions faster than the competition... with unmatched customer support and lead times. Nationwide sales force and distribution centers Custom or commodity – no problem Knowledgeable technical support team Solutions in days not weeks – most custom orders ship in 5 days or less Consult with us to develop a custom label stock solution - fast. Acucote Inc. • 910 East Elm Street, Graham, NC 27253 • 800.228.2683 • email@example.com • acucote.com