The printer uses dual staggered print heads, an integrated tri-heater system, strong industrial design and high-capacity 1 litre ink cartridges available in four or seven colour configurations. In a mirrored CMYK ink configuration, the EJ-640 can achieve speeds of up to 102m2/h

The EJ-640 utilises specifically designed ink developed alongside the machine to offer end users lower operating costs for high-volume and long-run print jobs.

The printer is accompanied by Roland VersaWorks Dual RIP software which offers customers the ability to process both PDF and PostScript files natively, including files with transparencies. 

Yuko Maeda, division president of Digital Printing Market Development for Roland DG commented, 'Today's sign market is typified by intense competition due to the spread of wide format inkjet printers and the increasing demand for quick delivery of high quantities with low operating costs. The new EJ-640 addresses these issues by delivering excellent productivity and quality with low ink costs.'

Focusing on high-volume businesses, the unit comes with a specifically designed high strength media shaft for holding  heavy media rolls securely. This combined with a newly developed feed adjuster ensures the smooth progression of media through the printer and onto the take-up system.

Also incorporated into the press is a powerful tri-heater, which dries the ink quickly to allow immediate take up. In four colour CMYK mode, up to two litres of ink can be loaded for each colour. In combination with the Roland Ink Switching System, continuous printing is possible without any worry of ink running out. Unattended operation is further facilitated by Roland OnSupport, which sends email to your smart phone, tablet or computer to notify the machine operator when a job is finished or ink is running low. 

The machine's internal structure has been built for precise ink droplet placement for vivid image quality even at high speeds, whilst the VersaWorks Dual RIP reproduces images with smooth gradations ideal for high quality print. In addition to dual CMYK, a seven-colour ink configuration consisting of CMYK plus Light Cyan (Lc), Light Magenta (Lm), and Light Black (Lk) is available to enable perfect colour photographs, corporate colours and brand logos.