UV WEB OFFSET PRESSES -- Finding the Cure
Temperature control over the entire printing process is another feature, he says. "We now offer chilled ink rollers, as well as chilled bay/idler rollers, to cool the web continuously—from the splicer to the UV lamps. When you control the environment of the UV process like that, the inks stays cool so it performs optimally and you can run at higher speeds. You wind up with more consistency, higher quality and improved productivity," Fetherman continues. "Some of our customers actually heat the rollers at the beginning of a job, then cool them once the web starts generating heat to ensure that every impression is made under the optimal conditions."
Sanden says its customers are looking for full programmability of the press in order to turn an otherwise daunting task of controlling print quality into a relatively simple and manageable process.
"Traditional web presses typically do not have this ability. The second key—no different from all press technology—is a fast makeready and low waste," Pitel says. "The third criterion is the increased need for a powerful ink train to allow the heavy coverage requirements of commercial applications, yet with a design specific to the requirements of UV ink."
So, with so much going for it in terms of technology and productivity, the future of UV web printing appears bright indeed. "You'll be seeing UV webs used to produce a growing number of printed products across the board," concludes Fetherman.
"The environmental issues with heatset and advancements in UV inks and UV press technology make the process an attractive alternative, especially for the publication and newspaper markets."