Durst Rho 351R User Manual

Rho 351R

Roll-to-roll UV-Inkjet Printer

The Rho 351R, a further development of
the Rho 350R, is a high-speed UV inkjet
printer for roll media, including: paper,
fabrics, vinyl and PVC films, up to a width
of 3500 mm (11.6 ft). The high print
quality, featuring fine text (as small as 4
point) and solid areas of colour with high
colour gamut and density, is achieved
using Durst Quadro Array print head
technology, innovative European mecha­nical engineering and Durst’s proprietary
image software.
The Rho 351R uses Durst Rho Roll Ink, a
virtually odourless, high pigmentation ink,
which has been specially developed for
excellent flexibility, adhesion and colour
stability on flexible material. It is ideal for
printing on such material as soft banners
(fabrics) and backlit textiles, tents and
awnings, truck side curtains, POP/POS
signs, large format posters, building
wrapping, wall paper and PVC films for
backlighting, etc...

The high colour density of 2.25 D and the
ability to underprint white or use it as
a spot colour, enables both the printing
of coloured media and the production
of photo-quality backlits. The printing
of backlits is automated by the special
backlit function which applies double the
ink coverage in one printing operation.
The high productivity, up to 170 m2/hr on
mesh, for example, is further optimised
by the ability to print two 1600 mm
wide, different diameter rolls simultane­ously, thus utilising the full width of the
equipment. Productivity is enhanced still
further by the stepless skip-white func­tion in an XY direction.
The printing operation is enhanced by an
integrated manual cutting device and the
user friendly, industry standard LINUX
operating software. The built-in security
system allows for unattended printing
of large rolls and double sided printing is
made possible thanks to the laser driven
registration.

Technology Advantages

Rho 351R product features:

• Addressable resolution 400 x 400, 400 x 600 dpi at your choice, in 6 passes according
to the needs of quality and productivity

• CMYK Rho Roll Inks and 2 spot colours (white over/underprint, functional varnish,
orange, green and ocean blue. UV curable inks allows for immediate use of printed
material

• Low ink consumption achieved by high pigmented inks providing low ink cost/m

• Environmentally friendly (“green technology”), no VOC’s

• Easy and fast media change with max. 70 cm media waste/change

• Virtually odourless, high density inks with high flexibility, no wicking on fabrics, and
high colour retention from the use of pigments with an 8 classification on the Blue
Wool Scale

• Unattended printing of big rolls is provided due to the built in security system
The Rho 351R uses Durst Quadro Array
print head technology with 512 nozzles
compactly arranged in an Array and con­tinuous flowing, temperature controlled
ink. Coupled with Durst’s proprietary
firing impulse software, which controls
the precise setting of ink drops at high
frequency, ensure the printing of fine text
(as small as 4 point) even on polyester
fabrics without wicking, as well as strong
solid colours and step-free color shades.
Brush-stretch rollers and a tension regu­lation device transport even thin fabrics
precisely and crease-free through the
printing equipment. The UV lamps, with
dichroitic coated reflectors, are adjustable
in steps and cure the UV inks even on
temperature-sensitive media.

(GSM modul with error warning via mobile phone - optional)

• Simultaneous printing on 2 rolls (each 1600 mm/excluded fabrics) even of different

diameter

• User-friendly operating software with management functions (ink usage/job, total ink

consumption, print-time/job etc) and interface to external order check software

• Double sided printing with optical-based registration (single rolls)

• Highly productive workflow from simultaneous ripping/transfer and printing of files

through additional RIP workstation

• Integrated manual cutting device

• Industrial standard LINUX operating software

2

The touch-screen user software is based
on printing experience and is driven
by industrial standard LINUX operation
software and ensures reliable, 24/7
production.
The software functions include:

• Media channel, archiving for the
selected tension for each media
the selected, UV lamp step, pass,
tension selection, vacuum strengths,
and “tuning option” to compensate
temperature related media
characteristics

• Skip white function (passes over
unprinted areas in XY direction)

• Queue function with selection criteria

• Backlit function in order to print double
ink layer in one printing process

• Interface to external order management

• Efficient workflow with color
management based on external Caldera
RIP Server

• Automated workflow using RIP-Job­ tickets and hot folders with saved
speed-passes, color management and
simultaneous administration of queue
and hot folders.