Screen Europe senior vice president of sales Bui Burke says the first users of the TruepressJet 520HD were in transactional print “where the pigment ink delivered great results on expensive paper”.
The technology then moved into books (and the first UK user of this press is book printer Printondemand-Worldwide), and now the door is open for commercial print. “This is the future, the next generation of inkjet,” he says.
The technology, particularly what the ink represented, is also a game change for Cees Rem. He is now product marketing manager at Screen Europe, but was previously working for CVG, the Dutch paper mill that has made its name with inkjet optimised papers.
“I had been involved in development of these papers for many year, but realised on the day that I saw the impact of the SC inks on standard papers that I would have to find another job.”
The SC ink is key to the breakthrough. It does not sink into the fibres of the paper causing cockling and resulting in a flat finish as other approaches have created. Screen is not saying much about the technology, Burke saying only “it coagulates like blood”.
This ability is vital to the success of inkjet printing: the cost of the inkjet specific papers is €300 a tonne more than a standard paper. “Transactional printers do not need to run offset papers, but in commercial printing we cannot expect customers to move back from the range of papers that they have always offered to a handful of papers for inkjet,” says Rem.
The press uses piezo printheads able to print four droplet sizes at 1200x1200dpi. The press uses a heated drum, air knives and now an Adphos NIR dryer able to remove 90% of the water before it soaks into the paper. The ink comes in 18 litre containers with the option of working with 200 litre drums for high volume users.
Bluetree invested in a TruepressJet 520HD and the sweet spot has been identified as 500-600 copies of a multi-section job. If there is light ink coverage this can stretch to 1,000 or more, but the cost of the ink is only one factor to be considered. “It is about other efficiencies,” Burke says. “It’s about removing people and processes, from a production chain that uses numerous people and processes to two people and two processes at Bluetree.”
The Screen TruepressJet 520HD uses piezo printheads able to print four droplet sizes at 1200x1200dpi, as well as a heated drum, air knives and now an Adphos NIR dryer able to remove 90% of the water before it soaks into the paper.