Short time-to-market, outstanding print quality and high fastness properties – offset printing inks already do a great job in a wide range of print applications like shrink-film, wrap-around and in-mold labels. Up to now, UV curing inks are successfully used in many cases. Converters who want to avoid the use of photoinitiators in energy curing inks can use electron beam (EB) curing systems to reduce the risk of potential migration problems.
Several industrial print trials on Comexi’s C18 central impression EB offset press have shown Siegwerk’s new EB technology offers an excellent print performance, low dot gain, low water dosing with less emulsification and scumming as well as fast intensity recovery after stops. The new ink technology is suitable for a variety of plastic substrates of the flexible packaging market like coex. OPP, acrylic coated PET, etc. Recently, first positive results were obtained in lamination studies with different packaging structures as well.
In many market segments, there is a trend towards shorter print job lengths driven by brand owners desiring packaging diversification and also an optimization of working capital along the value chain. Due to this, printers have to deal with frequent changes in the printed design and a varying average job lengths.
“In the past, typical print run lengths for example in beverage wrap-around labels were several tens of thousands of square meters,” said Dr. Stefan Busse, regional director application technology, Flexible Packaging EMEA at Siegwerk. “Today, more and more jobs are printed on wide web machines with only a few thousand square meters. In order to stay cost-competitive in these markets all cost drivers have to be minimized. That’s why some of our customers are attracted by the low cost of print forms for offset printing plates.”
Due to the excellent print performance of the new EB ink solutions, Siegwerk was invited to supply EB offset inks for Comexi’s last Open House event.
The new ink technology was developed in accordance with the relevant product safety standards. All ingredients are compliant with the stringent Swiss Ordinance and will also comply with the upcoming new German Ordinance.