Jeti Premium Inks for Gandi UV Printers

White and clear options available

Gandinnovations has released a new UV-curable ink, Jeti Premium, for its Jeti flatbed printers. The inks are 100% solvent-free, include white and clear options, and offer a wider color gamut of vibrant, sharp colors, the company reports. The new inks are manufactured using lightfast pigments such as those used in the automotive industry, making them suitable for outdoor uses such as billboards, automotive decorations, and vehicle wraps. According to Gandinnovations, these inks exhibit excellent flexibility and superior adhesion to substrates like polycarbonate, polystyrene, Coroplast, ABS, PVC, polyolefin, and polyester.


Cationic UV Technology

Cationic UV (ultraviolet)-curable inks and coatings have been offered commercially for more than 30 years, but to many printers and converters, it still is a ?new technology.? Cationic UV technology was developed early in the 1960s and initially focused on photo-resist applications. In the early “70s, as UV free radical use grew, cationic UV inks and coatings were developed commercially and used in converting plants. As the technology grew, UV free radical inks found application in offset printing applications for metal can decoration and in lithographic printing applications. Cationic UV ink technology lagged behind due to raw material limitations, and as a result, UV free radical-based inks became the dominant radiation-curable ink technology. At the same time, cationic UV coating technology, which had outstanding potential, had inherent compatibility issues with many conventional inks as well as UV free radical inks. Cationic UV inks could be ?poisoned? by amines, which were common ingredients in UV inks as well as conventional inks. The less troublesome course was to use UV free radical coatings in combination with UV free radical inks. Early success of UV inks combined with UV coatings was based on free radical chemistry. Although both technologies rely on high-energy UV radiation to dry the inks via a photo-initiator to start the rapid photo polymerization, this is about where the similarities end. Free radical UV inks and coatings depend on the generation of photo-induced decomposition of photoinitiators that produce fragments that contain an unpaired electron ? a free radical. Such unpaired electron species are ?hot? and chemically react rapidly with unsaturated monomers to produce free radical polymerization. Free radical polymerization can be inhibited by acids and proton-donors, but in general they are catalyzed by amines. Oxygen can scavenge the free radicals by forming peroxides that inhibit or delay the free radical curing process. Cationic UV inks and coatings generate a photo-induced decomposition of a photoinitiator, which leaves a positively charged fragment, called a ?cation.? This cation can take the form of an electron-deficient species such as a Lewis acid. Such electron-deficient or cationic intermediates are ?hot? and chemically will react rapidly with epoxide monomers and similar chemicals to produce a cationic polymerization. Cationic polymerization is inhibited by amines and certain electron donor chemicals. Among the interesting differences between these technologies is that cationic UV systems typically produce systems with better adhesion as well as lower odor characteristics. The reasons for these differences lie in the inherent differences in the raw materials and the chemistry of the reactions. Whereas UV free radical chemistry brings unsaturated monomers together, and in doing so often will show film shrinkage, cationic UV systems open the epoxide strained ring, which expands or at least limits the shrinkage at the molecular level. In addition, since the polymerization is cationic, oxygen inhibition is not applicable, and unless there are some chemical inhibitors in the ink film, the cationic cure can proceed without inhibition. This fosters higher molecular weight in the polymerization and produces excellent product resistance. Today, cationic UV systems are available in the form of inks, coatings, and adhesives. Their growth has been noteworthy in Europe, and applications have been commercialized in the use of UV cationic flexo inks as well as cationic UV-curable adhesives. Cationic low-shrinkage characteristics make cationic UV a suitable choice for shrink-wrap applications. UV technology was commercialized in the “70s to deal with volatile organic compound solvent emissions. With the downturn in the global economy, its superior productivity advantages have propelled its application in a variety of printing and converting processes. Demands for high print quality as well as the unique ?feel? of UV-cured products continue to drive the UV inks and coatings markets. Cationic UV technology clearly has a role to play in flexible packaging. Its unique characteristics are a good fit for many applications in which UV free radical chemistry may not be adequate. While it may not be suitable for all applications, where it can be used, cationic UV technology offers an excellent alternative to free radical UV polymerizeable systems.

Mimaki Large Format UV Curable JF series flatbed printer

JF Series Promotion movie
320 x 240 Pixel / 6.69MB
High quality, direct digital printing on large uncoated substrates up to 1.6m x 3.2m (5’ x 10’). JF series delivers a new level of productivity.
JF Series is the large format, UV-curable inkjet printer with the versatility to print on numerous uncoated substrates including corrugated plastics, acrylics and uneven or irregular materials. With a maximum resolution of 1200 x 1200 dpi, JF Series is suitable for Sign and POP display graphics for both long and close viewing distances. Using the standard white ink, JF Series can print bright, vibrant color even on transparent and colored media. With the newly developed clear liquid, you can achieve a high-gloss finish while also improving color-fastness. JF Series is equipped with dual UV lamps, enabling high speed, bidirectional printing. It is a dynamic printer with functions to maximize true flatbed platform advantages. We are pleased to add the new capabilities of flatbed printers to the large format graphics field.
1,200 x 1,200dpi with 7 different dot sizez, delivers high quality prints
The highest resolution of 1,200dpi and the variable dot technology (7 different dot sizes) realize near photographic image quality.
Even 4-color mode realizes a non-grainy print. With a minimum dot size of 6pl.,sharp edges of small texts and smoth skin tones can be created.
With 6 colors plus white and clear, beauty and brightness of the colors will drastically change.
White Ink
By using white ink, more vivid images and sharper color contrast can be achieved
[ Sample prints on transparent aclylics ]
6 colors Only   6 colors + white ink
Without white ink as a basis for overprinting,
the colors are not vivid
  With the white ink overlay print,
the images are bright and vivid
Clear Coat
By using a clear coat or vanish,you can get a high-glossy finish
Beauty of colors is enhanced and color-fastness is also improved.
6 colors only   6 colors + Clear Coat
UV-curable ink used for a wide variety of materials.
With UV technology,the inks are cured (dried) on the printer.
Prints can be made on uncoated substrates and the prints can be handled immediately.
  UV-curable ink used for a wide variety of materials.
Superior image quality and printing speeds compared to comparable printers
Dual UV lamps
JF series has UV lamps installed on both sides of the carriage, allowing higher production speeds with bidirectional printing. This helps contribute to the machine’s high productivity.
  Dual UV lamps
  Print speed
(600x600dpi & 1,200×1,200dpi, 4-color mode & 6/8-color mode) unit:m2/hr.
  4-color mode
6/8-color mode
JF-1631 JF-1610 JF-1631 JF-1610
resolution pass m2 sq.ft m2 sq.ft m2 sq.ft m2 sq.ft
4pass Hi 18.4 198 17.5 188
8pass Hi 10.1 109 9.8 105 5.8 62 5.6 60
16pass Hi 5.2 56 5.0 54 2.7 29 2.6 28
8pass 7.6 82 7.3 79 5.0 54 4.9 53
16pass Hi 5.1 55 5.0 54 2.7 29 2.5 27
RasterLink IP III
High performance software RIP helps you utilize the various functions of the JF series
16 bit rendering eliminates tone jump and produces fine color reproduction.
Different images can be laid out freely on the RIP.
Versatile editing functions such as tiling, trimming, scaling and rotating are provided.
Able to network in environments where Windows and Macintosh co-exist.
  RasterLink IP III
8 bit rendering 8 bit rendering   16 bit rendering 16 bit rendering
JF series provides various functions to meet demanding production requirements
Vacuum table    
The vacuum table is divided into six zones. Its activated zones can be set according to the size of materials, thus effectively holding down various sized materials. You can also reverse the air stream to create a blanket of blowing air using the same vacuum holes. As it lifts the substrate, you can move or replace heavy substrate easily and align the position simply and securely.   Vacuum table
At the time of vacuum pressure   At the time of blowing air
  The vacuum flatbed with air allows easily misaligned substrates to be fixed securely.       The substrate is lifted slightly by blowing air, allowing the substrates to be moved easily  
  At the time of vacuum pressure       At the time of blowing air  
Multiple pre-cut pieces can be positioned on the fixed flatbed surface. (thicknesses must be the same)  
Multiple pre-cut pieces can be positioned on the fixed flatbed surface
The materials can be placed independently from each other, enabling accuarte positioning of objects. You can print using the entire surface of the flatbed, whether it is one big object or many small objects. Large orders can be handled quickly and efficiently.
Thick materials
With a maximum printing thickness of 50mm (2″), you can print directly onto thick materials and materials with slightly uneven surfaces.
  Thick materials
Y-Bar Height-Adjust Mechanism  
Y-Bar Height-Adjust Mechanism
The electronically controlled YBar Height-Adjust Mechanism allows users to easily adjust the height of the print head for a wide variety of media, thick or thin.
Sensors to prevent head strikes
The jam-detecting sensors prevent head crashes caused by substrates which are bent or warped.
When a material lays flat, the print head moves smoothly.   When a material is warped, the print head stops automatically to avoid head damage.
Environment-friendly UV curable ink  
Environment-friendly UV curable ink
Either 8-color or 4-color ink sets can be selected and status of remaining ink is displayed on the operation panel. UV curable ink is free of VOC (Volatile Organic Compounds) , is less odorous and thus ensures a cleaner working environment.
Roll hanger
Roll hanger is equipped to handle flexible or rolled substrates. *Thin materials, such as paper or film should be tested beforehand, since marks of the place where the vacuum holes are located may remain.
  Roll hanger
JF Series  
Effective printing area/
1,602 x 3,100mm (63″ x 122″)
Effective printing area/
1,602 x 1,016mm (63″ x 40″)