13.01.2015
Bulk UV Inkjet Printer Ink UV Curable Ink for Epson R2800 R3000 CMYK, View uv inkjet printer ink, Netural Product Details from Shenzhen Goosam Technology Co., Ltd. The UVA, UVB, and UVC bands can be further divided into subtypes that denote specific applications and identify the principal absorber of the radiation.
In addition to type, the Engineering360 SpecSearch database allows industrial buyers to search for UV light systems by configuration, application, specifications, and features.
Curing chambers are used for the curing or hardening of "dry" inks, coatings, and adhesives. UV conveyors or continuous systems consist of a belt conveying unit, power supply and UV light source, as well as an enclosure that is open on both ends, which allows products or sheets to pass through the system. Hand held or portable UV devices are useful for repair and testing in field, laboratory, plant floor, and other settings where transportation of large systems is impractical. Spot or wand systems are benchtop units that provide a UV beam with a small spot size for selective curing applications. Wallorceiling-mounted UV systems disinfect anair stream as UV light irradiates theair circulating through the room. Counterfeit detection, surgery suites sterilization, room disinfector, forensics, water purifier, material processing and identification, dentist procedures. Fast curing of UV adhesives, coatings, and inks, industrial applications including UV bonding, sealing, and encapsulating, automotive, electronic, optical, and medical device assembly industries. Curing of inks, adhesives, varnishes, coatings and electronic potting resins: Certain inks, coatings and adhesives are formulated with photoinitiators and resins, which polymerize when exposed to the correct energy and irradiance. Security: Sensitive documents such as credit cards, driver's licenses and passports may include a UV watermark.
Biology and Chemistry: Fluorescent dyes are used in biochemistry and forensics as genetic markers for research. Air and water purification: UV light is an effective tool used to change irritating pathogens, pollens, and mold spores into inert byproducts by destroying their DNA and breaking down the organic material found in indoor air. Analyzing and Authentication: Minerals, gems, art work, collectibles, and currency can be analyzed and authenticated using UV lamps due to their fluorescent properties.
Sanitary compliance and sterilization: The DNA of microorganisms can be altered when exposed to UV radiation. Solar Cell Testing: Research is underway on converting UV radiation from the sun into energy and can be used as substitute for conventional window glass. Filters can be integrated or optional and are used in analyzing and authentication applications.
Multi-direction exposure UV systems can expose a product or material to light from multiple directions. Pulsed UV light systems and products that use light emitting diodes (LEDs) as a light source. UV curing systems use ultraviolet radiation to initiate reactions and cure adhesives, coatings and other UV curable resin products.
In the inkjet arena of narrow format, there is Screen (Dainippon), HP, Kodak Versamark and Agfa Dotrix. Wide- and grand-format printing applications have flourished because of the flexible nature of inkjet technology and adaptability of inkjet chemistries to various substrates. The capability to control this change only when the printer needs it to happen makes the ink appealing to anyone occupied in the use or formulation of inks.
Sales of UV inks have been given considerable momentum by new European Union legislation on the emissions of volatile organic compounds (VOC).
Second, UV-curable inks can be printed at higher speeds in both narrow- and wide-format sizes without the need for cumbersome drying systems. Coupled with that flexibility is the wider range of rigid substrates that these inks have superior adhesion to.
PhotoinitiatorsIn starting and completing the UV-curing process, photoinitiators are the prime components. The types of photoinitiators most commonly used in inkjet inks have been of the free-radical nature. MonomersA monomer (from Greek mono ?°one?± and meros ?°part?±) is a small, single molecule that may become chemically bonded to other monomers to form a polymer.
OligomersOligomers have a high molecular weight and form the chemical spine of a UV-curable ink.
Additives Depending on the UV ink formulation, other additives can also be included, such as flow and wetting aids, antioxidants and stabilizers. Stabilizers are used to help with the ink??s shelf-life and increase the tolerance to heat, which is important at higher jetting temperatures.
Free-Radical UV InkPresently, the majority of flatbed inkjet systems use what are called free-radical UV inks, rather than cationic (containing positively charged electrons) UV inks. Free-radical UV inks use an acrylate or urethane resin, which polymerizes rapidly when exposed to UV radiation.
Free-Radical, Cure-UV LampsFree-radical UV inks typically use a shuttered mercury-vapor lamp on either side of the print head to produce enough UV output to complete the curing process. A UV lamp??s peak intensity will have a drop off in performance that is related to the bulb type, usage and duty cycle of the printer.
Even though the UV-curing process is fundamentally an immediate process ?? inks are certainly ?°dry to the touch?± right after printing ?? some post-curing does take place.
CationicCationic inks, which generally use epoxy resins instead of urethanes, also are virtually odor-free. The curing process is best described as the following: The protons, generated from the photoinitiator during UV exposure, continue to be active after exposure.
These inks typically have better adhesion to the traditional ?°difficult?± substrates, like expanded plastics and glass. Cationic Cure LampsCationic inks cure from UV lamps that are ?°tuned?± to the specific wavelength of UV radiation needed by the photoinitiator. SKYJET UV flatbed inkjet printer has the similar great performance as the synchro double side printer and 3×2 UV printer. Traditional printing technologies (ie head) using conventional materials generate high energy costs due to the intensive use of kilns and dryers required to draw water and solvents printing inks (ink curing). Ultraviolet (UV) radiation is electromagnetic radiation of a wavelength shorter than that of the visible region and longer than that of X-rays.
The Sun emits a vast range of electromagnetic radiation with approximately 10% of that energy in the ultraviolet region. A mercury arc lamp, broadly speaking, is constructed of a long sealed quartz tube which is filled with a starting gas and a small amount of mercury and has an electrode at each end. When a voltage is applied between the electrodes, the starting gas ionizes and starts to heat up. The majority of current inks and coatings are cured by exposure to energy at the 254nm and 365nm regions.
Some new coatings and special applications call for other wavelengths such as 385nm and 417nm.
Conventional inks and coatings (water or solvent based) are dried through an evaporation process which removes approximately 40% of the delivered ink volume. UV curing inks and coatings contain a "photoinitiator" which is a special compound sensitive to UV radiation.


From a quality perspective, UV inks and coatings have excellent chemical, abrasion and heat resistance. As UV inks and coatings do not dry until they are cured, there is no need to wash-down machines at the end of shifts or between runs. Energy efficiency will be greatly improved as the UV lamphead focuses the energy exactly where it is needed, at the substrate surface.
It is a form of electromagnetic radiation with a wavelength shorter (100 - 400 nanometers) than that of visible light (400- 780nanometers), meaning that UV light is more energetic. Excitation occurs when radiation is excited by the motion of the atoms or molecules, or causes an electron to jump from an occupied orbital into an empty, higher-energy orbital. Ionizing radiation is used for X-rays, medical, biological and sterilization applications and is a by-product of nuclear power. The following chart provides an abridged view of the electromagnetic spectrum and divides UV light into these spectral subcategories. Also known as black light, UVA rays comprise 98% of the ultraviolet in sunlight at the Earth's surface.
UVC rays have the highest energy per photon, and thus are more dangerous than UVA and UVB radiation. They consist of a power supply, light source, and enclosure or chamber that provides a work surface and shields the operator from radiation.
Process or line-mounted UV systems include a power supply, light source and flange, cartridge mounting or fitting, web system, coating line, and conveyor lines or tanks that transport chemicals, plastic film, or other transparent media for processing. Currencies for many countries also include an image and multicolored fibers that are visible under ultraviolet light. Papyruses and manuscripts can be read using UV light to distinguish ink from paper on the surface. Phototherapy is a treatment available for skin conditions like psoriasis and eczema, as well as vitamin D deficiency and certain fungal growths.
The light causes chemical reactions to occur in the photoresist material to create a pattern on a sample. When used in conjunction with other sterilization techniques, UV light is an effective tool to sterilize laboratory workbenches and medical facilities. Shortwave bulbs emphasize UVB and UVC while longwave bulbs are used from UVA and visible light. Intensity decreases as the object's distance from the light increases and when curing through substrates that transmit less than 100% of the light used for curing. This is important if the bond-to material is not transparent and shadows the adhesive from an overhead beam. Ink research and development for inkjet printing has never been greater, with a migration from the original water-based dye and pigment inks to the presently popular mid- and high-solvent and UV-curable inkjet ink types. Within the last two years, there has been a incredible rush toward the use of UV-curable inks in most of the printing markets. UV-curable inks, which were already being used extensively in the screen printing field, are replacing much of the solvent inkjet ink currently in use. Lastly, the flexibility now being seen in the UV ink formulations allows roll-to-roll capability, opening up fleet graphics applications in the areas of wide- and grand-format printing. Compared to solvent inks, UV does not dry up in the inkjet head and exhibits a lower rate of nozzle failure caused by blockage. A polymer can be any of numerous natural and synthetic compounds of high-molecular weight, consisting of up to millions of repeated linked units ?? each a relatively light and simple molecule. After absorbing UV energy from the light source located on the print head, the photoinitiators fragment into reactive materials that start the chemical reaction known as polymerization. Ink formulators work with photoinitiator suppliers to develop inks that are compatible with the UV output of medium-pressure, mercury-vapor bulbs found in most curing systems for inkjet printing.
Monomers provide many specific functions within an inkjet formulation, depending on their viscosity and chemistry.
Oligomers determine the final properties of the cured ink film, including its elasticity, outdoor performance characteristics and chemical resistance.
Usually, the colorant is pigment-based because of the greater light fastness and durability of pigments compared with dyes.
Surfactants (surface active agents) are included to ensure the ink film spreads in a controlled fashion, and coats the media or substrate uniformly. Simplistically, stabilizers neutralize or absorb reactive molecules in the ink during storage and prevent polymerization.
Recent innovations of new performance-enhancing, cationic-ink chemistry have stimulated their development for inkjet-type applications.
These bulbs are unbelievably hot, and that temperature gets transmitted to the substrate with each pass of the print head.
UV curing lamps age, and with subsequent changes in output, they may reach a point in which inadequate energy is emitted to fully cure the ink layer. Dust and ink residues on lamp windows and reflectors also can have an impact on the lamp unit??s output, requiring periodic maintenance to prevent any reduction in cure efficiency.
UV-curable inks are essentially on top of the substrate (unlike solvents that etch into the substrate), and the interface between the ink and the substrate is not as strong as solvent inks.
They start to polymerize when exposed to UV radiation in the nanometer range which stimulates the photo initiator chemistry. The excellent adhesion to difficult substrates is related to the ink??s reduction in shrinkage (due to heat), which is roughly one-third of that experienced by free-radical UV ink systems.
Manufacturers also are utilizing UV-light emitting diodes (LED) lamp blocks to supply the necessary UV energy.
With smooth gradient and delicate performance in detail, print 4 colors saves 50% of printing over 6 color printing system costs.
And UV flatbed inkjet printer researches from synchro double side printer and 3×2 UV printer.
UV flatbed inkjet printer method does not require heating or drying, with a fraction of the whole requires traditional thermal energy. Since UV inks dry so quickly on- or off-press, you can get a faster turnaround on a job than conventional inks.
Conventional inks sink into uncoated stock, but UV inks are cured within seconds on press, so they don't have time to settle into the stock.
Since UV inks flash-dry on press, they resist smudging and scrapes more than conventional inks, which remain a bit soft after printing. Here on Earth we are protected to some extent by the ozone layer which absorbs UV to the extent that 99% of the ultraviolet radiation reaching the Earth's surface is UVA.
The hot gas evaporates the mercury which then emits radiation, a proportion of which is in the UV range. This corresponds with the natural spectral output of an undoped mercury arc lamp as shown below.
Its exposure to intense UV radiation initiates a rapid catalytic reaction in the ink or coating, transforming it from liquid to solid state as a crosslinked polymer network.
The high solids content gives greater consistency of viscosity and colour, provides for a very high gloss finish and gives better consistency between substrates. Wash-downs tend to be quicker and easier too as there will be no dried on contaminants and no cell plugging of anilox rollers.


Machine operators generally prefer working with UV curing systems as they provide a better, safer and healthier working environment. They rays are completely absorbed by the ozone layer, but can pose a serious threat if looked at for an extended period of time. They prevent the cured item from being exposed to dust and contaminates in the air during drying. The reaction is very fast and is used in glass and plastic bonding, optical fiber coatings, dental fillings and finger nail gels.
UV lamps are also used to detect organic mineral and biological deposits that remain on surfaces, such as restrooms and bedding. Driving the shift to UV is its ability to almost immediately change the ink state from a liquid to an extremely resilient hard film. This increase has been driven by new developments in ink technology and demand from printer manufacturers and end users. Solvent- and water-based inks dry by evaporation and upwards of 80 to 90 percent of those ingredients go into the atmosphere as vapors during the printing process. Ultraviolet light is electro-magnetic radiation, situated between 200 and 380 nm of the light spectrum. But there are downsides, including UV-light exposure hazards and possible sensitization issues related to the handling of uncured UV ink. Disadvantages from this type of light source include excessive substrate heating, high power consumption and the need for scheduled lamp replacement.
Most mono-functional monomers are used as ?°solvents,?± or flow modifiers, because of their ability to reduce viscosity and combine with other ink components.
Pigments used in outdoor advertising and display applications have similar requirements to those used in automotive paints. Careful control of drop-spreading behavior contributes to the dot-gain control, which is vitally important for image quality. There are limitations to free-radical UV inks, which include oxygen inhibition, poor adhesion to difficult substrates and residual odor. If the ink layer is not cured completely, the ink will not reach its intended hardness potential.
Moreover, the effects of exposure time to UV radiation are cumulative: If an ink is over-cured, it can become fragile and flake off. In the past, cationic inks have been available for UV-curable analog printing, but the polymerization process could take hours from initiation to completion.
That means a coating does not need to be fully cured after it leaves the light source, just dry to the touch. Cationic inks are sensitive chemistries, and can react with the bases and acids present in inkjet media, resulting in poor adhesion. This feature enables UV inkjet systems to be used on substrates that, until now, had been considered unsuitable, including vehicle graphics, uncoated glass materials and other slick or heat-sensitive substrates. These two UV curing lamp systems do not generate the high temperatures associated with mercury-vapor lamps. His extensive background in digital imaging, electronic pre-press for print, professional photography and computers, serves members by supplying individualized solutions to their daily business problems.
UV flatbed inkjet printer process uses a special ink formulation that is cured by UV lamps, so that a printing press fed cold, print quality, process color on glossy paper.
The output from a typical medium pressure mercury discharge lamp spectral distribution is shown below.
With UV flexo-inks offering a sharper dot structure, an altogether superior finish can be achieved. As a result, machine utilization will be greatly improved and, with no evaporative losses, ink consumption will be reduced. As typical UV formulations do not contain solvents and volatile organic compounds (VOCs) , the considerable health risks associated with vapour inhalation are eliminated.
As the following diagram shows, the energy of the wave increases as the wavelengths become shorter. The loss of an electron can change the chemical structure and cause cell damage by mutating its genetic code. UVA can cause damage to collagen by destroying vitamin A and causing damage to keratinocytes. They damage the skin's superficial epidermis layers and play a key role in the development of skin cancer. UV curing has been shown to increase production speed, reduce reject rates, improve scratch and solvent resistance, and facilitate superior bonding. UV traps can also be used to eliminate small flying insects that are attracted to the light. The advantages of UV-curable inks overshadow any disadvantages, marking them as the dominant ink system for the future of industrial inkjet printing. Let??s go over some of the verbiage associated with UV inks, and how the UV curable process works.
Cold curing mitigates the heat issue associated with free-radical UV cure inks while, at the same time, the cured ink is more robust at its cured endpoint. Burton received his Bachelor of Science in Photographic Science from the Rochester Institute of Technology.
This UV flatbed inkjet printer performs automatic detection means for detecting and measuring the distance between the print head and the loaded media. The reduced curing times enable high production speeds and immediate post processing (stacking, folding, polishing etc). Despite its link to skin cancer, UVA rays are frequently used in tanning booths and sun lamps. While a pigment is selected on the basis of the required application, size control and reduction along with dispersion technique are major components of ink formulation. Corresponding to the thickness of the filled material, said apparatus is automatically set to the optimum pressure level of the medium.
The recording quality is still comparable to cold web printing with colors that are alive and not transferred or smudging.
With less frequent wash-downs and better printing consistency, presswork becomes altogether easier. The printer uses UV printer platform Snorkel high precision load rigid with a maximum thickness of 100 mm material.
By vacuum absorption for the medium, the platform makes the ink on the right to fall exactly. These ?°higher functions?± of a monomer add improved film hardness and resistance properties, but may also increase the viscosity of the chemistry.



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Comments Uv cured ink removal tips

  1. FiDaN
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  2. lowyer_girl
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  3. rebeka
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  4. VIRUS
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