by clicking the arrows at the side of the page, or by using the toolbar.
by clicking anywhere on the page.
by dragging the page around when zoomed in.
by clicking anywhere on the page when zoomed in.
web sites or send emails by clicking on hyperlinks.
Email this page to a friend
Search this issue
Index - jump to page or section
Archive - view past issues
FLEXO Magazine : April 2011
Technologies & Techniques “ When it comes to the G7 Master qualification process for flexographic printers, there are some unique challenges,” says Joe Fazzi of IDEAlliance. “For example, when we look at the pass/fail requirements in passing gray-balance tests, we have to look at the highlight areas as they are applied differently than for other types of printing processes. That’s more about the mechanical nature of flexography. But it’s an evolving process and we’re continually having our people take a look at how we can improve and refine the G7 Master qualification process for flexographic printers.” What G7 Means to FlexoGraphic printers The G7 Master Program has been around a long time in the offset industry and has developed acceptance and notoriety among printers. But the same can’t be said for its presence in flexography, although there are clearly some sig- nificant benefits. Of course, G7 targets have to be achievable and practical for flexographic printers to get on the band- wagon and, unfortunately, there may be some misinformation and skepticism among flexographic printers about whether it will help their business. In the past, one main challenge for flexographic printers has been to try and hit IDEAlliance G7 targets and requirements. This has in part led to additional advancements and improve- ments to the process itself, as well as related technology, tools and software available to both prepress and the press- room. Combined with the higher consumer product company demand for flexo-printed products to match that of their offset counterparts (especially when they sit next to each other on a store shelf), the onus is on our industry to meet that demand. What G7 means for today ’s flexographic printer is that you now have a better definition of your customers’ expecta- tions, how they define gray and their target color space. This benefits you, the printer, both internally amongst all your print devices, and for those with multiple locations or multiple print processes. Of course, the exact definition and targets that constitute gray balance are at the core of the G7 Master Program. By defining a common gray, we establish a baseline for all other colors so all G7 print devices are shooting for the same bull’s -eye. A second benefit is that, once the G7 protocol is in place, it becomes a good tool to calibrate the process and print more consistently from run to run. It’s essential for the pressroom manager to help make sure the last roll looks like the first roll off the press, which looks like the previous run for that product. Maintaining this kind of quality control can be very challenging without reference targets. In fact, without them, the press calibration process is really an act of futility. inVariaBle, eMperical, QUantiFiaBle Although the decision by Revolution Labels to become G7 Master-qualified was driven primarily by the needs of one of its top customers, the printer already had an appreciation for the benefits of calibrating equipment for proper gray balance and having measurable targets to control the process. The author takes measurements with a spectrophotometer, then documents results, using all-important control targets. 28 FLeXO april 2011 www.flexography.org