At a Glance
Durst’s Rho 312R images roll media at 1,400 sq. ft./hr. Its Quadro Array printheads and pulse-firing software allow it to produce 600 dpi down to 4-pt. text. The printer’s step-adjustable UV lamps ensure proper ink curing when imaging on heat-sensitive media, and its industrial-grade, media-handling system accommodates media roll diameters up to 17.7 in. It has five-liter ink tanks that allow extended print runs without operator intervention. The 312R’s basic color configuration is CMYKcm. Options include light magenta, light cyan and white ink.

The Rho 312R prints on roll media at 1,440 sq. ft./hr. (710 sq. ft./hr. in its high-quality production setting).It uses Durst’s UV-cure inks, which will adhere to virtually anything.
The 312R measures 23 ft. 4 in. x 5 ft. 6 in. and stands 6 ft. 5 in. high. The maximum printing width is 10 ft. 6 in., or 126 in. It weighs 9,900 lbs., a shade less than five tons. Durst recommends reserving a 30 x 30-ft. space for the printer. Its operating temperature range is 59° to 86° F, with a humidity range of 25 to 80% relative humidity, non-condensing.

Printing technology
Durst’s 312R inkjet heads have 512 nozzles. The reality, however, is far more complex. Durst has developed and produced its Quadro Array head technology that comprises a precisely machined carrier plate and assembly that holds 128 nozzle modules, which produce 30pl drops. To ensure precise tolerances, Durst performs additional printhead modifications in its factory clean room. The printer’s systems also heat and filter the ink, to ensure it’s clean and temperature-matched (to the heads), prior to processing through the heads.
These systems, and the 312R’s proprietary, pulse-firing software, allow the heads to produce 600-dpi resolution down to, really, 4-pt. text. Also, color hues transition seamlessly (no apparent banding), and the colors are vivid and vibrant.
Because it’s a UV-cure printer, the ink-cure lamps are an important topic. They can produce high temperatures that, in some instances, warp selected print media. Durst’s solution is to install step-adjustable curing lamps, to ensure proper ink curing while not damaging the print media.
The printer images on a wide range of both uncoated and coated media: banner, vinyl, polyester, canvas, PVC, adhesive-backed media, paper and fabrics, for example. The ink characteristics also eliminate wicking.