The Omet Varyflex V2 is the most flexible narrow- and mid-web press for packaging printing and converting on the market. Its unique platform design combines a wide range of printing and finishing technologies in-line, such as UV and solvent-based flexo printing units.
Solvent-based flexo printing is mainly used in food packaging printing, in particular on plastic films, laminates or aluminium material for yogurt lids.
While solvent-based flexo inks are much cheaper than UV inks, they need to be cured through specific hot air drying systems, which can also be produced on demand thanks to the unique expertise of Omet R&D in this field. It is also possible to combine UV curing and hot air drying systems on the same flexo unit.
Rotogravure is another printing technology using solvent-based inks that can improve the performance of the Varyflex V2, thanks to interchangeable groups that can be moved between flexo stations according to the task. For solid printing, metallic inks and special varnish applications, rotogravure is the ideal cost-effective solution.
Globally several successful installations prove the reliability and the high performance of the technology. Alfonso Melesi, technical manager explains, ‘We designed a few machines exclusively for solvent-base printing, other machines with one solvent-based flexo or rotogravure unit in-line for special colour application, and exclusive projects featuring standard UV configuration with the addition of two rotogravure units, one in front and one at the end of the line. In this case, rotogravure technology is used to make compliant food packaging through solvent lamination, which doesn’t allow for ink migration.’
