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The emerging ink jet material deposition market also uses inkjet technologies, typically printheads using piezoelectric crystals, to deposit materials directly on substrates. The technology has been extended and the ink can now also comprise living cells,3 for creating biosensors and for tissue engineering. There are two main technologies in use in contemporary inkjet printers continuous CIJ and Drop on demand DOD. Continuous inkjeteditThe continuous inkjet CIJ method is used commercially for marking and coding of products and packages. In 1. 86. 7, Lord Kelvin patented the syphon recorder, which recorded telegraph signals as a continuous trace on paper using an ink jet nozzle deflected by a magnetic coil. Free Download Advanced System Care Terbaru Full Version' title='Free Download Advanced System Care Terbaru Full Version' />Download Bitdefenders free antivirus software and enjoy awardwinning, nagfree protection against ethreats. Zero configurations, zero popups Inkjet printing is a type of computer printing that recreates a digital image by propelling droplets of ink onto paper, plastic, or other substrates. Inkjet printers. Gmail is email thats intuitive, efficient, and useful. GB of storage, less spam, and mobile access. SketchUp is 3D modeling software thats easy to learn and incredibly fun to use. Download SketchUp today for free and get started drawing in 3D. CCleaner automatically deletes unneeded files and Windows Registry entries. It can also detect duplicate files, securely wipe a storage device, and act as an. A library of over 1,000,000 free and freetotry software applications for Windows, Mac, Linux, Mobile as well as Windows device drivers, games and gaming tools. Mozilla Firefox is a popular Web browser available on a variety of platforms. Its code DNA reaches back to the dawn of the World Wide Web and has shaped other. The first commercial devices medical strip chart recorders were introduced in 1. Siemens. 4In CIJ technology, a high pressure pump directs liquid ink from a reservoir through a gunbody and a microscopic nozzle, creating a continuous stream of ink droplets via the Plateau Rayleigh instability. A piezoelectric crystal creates an acoustic wave as it vibrates within the gunbody and causes the stream of liquid to break into droplets at regular intervals 6. The ink droplets are subjected to an electrostatic field created by a charging electrode as they form the field varies according to the degree of drop deflection desired. This results in a controlled, variable electrostatic charge on each droplet. Charged droplets are separated by one or more uncharged guard droplets to minimize electrostatic repulsion between neighbouring droplets. The charged droplets pass through another electrostatic field and are directed deflected by electrostatic deflection plates to print on the receptor material substrate, or allowed to continue on undeflected to a collection gutter for re use. The more highly charged droplets are deflected to a greater degree. Make Adobe Acrobat Open Faster Internet on this page. Only a small fraction of the droplets is used to print, the majority being recycled. CIJ is one of the oldest ink jet technologies in use and is fairly mature. The major advantages are the very high velocity 2. Another advantage is freedom from nozzle clogging as the jet is always in use, therefore allowing volatile solvents such as ketones and alcohols to be employed, giving the ink the ability to bite into the substrate and dry quickly. The ink system requires active solvent regulation to counter solvent evaporation during the time of flight time between nozzle ejection and gutter recycling, and from the venting process whereby air that is drawn into the gutter along with the unused drops is vented from the reservoir. Viscosity is monitored and a solvent or solvent blend is added to counteract solvent loss. Drop on demandeditDrop on demand DOD is divided into thermal DOD and piezoelectric DOD. Thermal DODedit. A Canon inkjet with CMYK cartridges. Most consumer inkjet printers, including those from Canon FINE, Hewlett Packard, and Lexmark, use the thermal inkjet process. The idea of using thermal excitation to move tiny drops of ink was developed independently by two groups at roughly the same time John Vaught and a team at Hewlett Packards Corvallis Division, and Canon engineer Ichiro Endo. Initially, in 1. 97. Endos team was trying to use the piezoelectric effect to move ink out of the nozzle but noticed that ink shot out of a syringe when it was accidentally heated with a soldering iron. Vaughts work started in late 1. The team at HP found that thin film resistors could produce enough heat to fire an ink droplet. Two years later the HP and Canon teams found out about each others work. In the thermal inkjet process, the print cartridges consist of a series of tiny chambers, each containing a heater, all of which are constructed by photolithography. To eject a droplet from each chamber, a pulse of current is passed through the heating element causing a rapid vaporization of the ink in the chamber and forming a bubble, which causes a large pressure increase, propelling a droplet of ink onto the paper hence Canons trade name of Bubble Jet. The inks surface tension, as well as the condensation and resultant contraction of the vapor bubble, pulls a further charge of ink into the chamber through a narrow channel attached to an ink reservoir. The inks involved are usually water based and use either pigments or dyes as the colorant. The inks must have a volatile component to form the vapor bubble otherwise droplet ejection cannot occur. As no special materials are required, the print head is generally cheaper to produce than in other inkjet technologies. Piezoelectric DODedit. Piezoelectric printing nozzle of an EPSON C2. Most commercial and industrial inkjet printers and some consumer printers those produced by Epson and Brother Industries use a piezoelectric material in an ink filled chamber behind each nozzle instead of a heating element. When a voltage is applied, the piezoelectric material changes shape, generating a pressure pulse in the fluid, which forces a droplet of ink from the nozzle. Piezoelectric also called Piezo inkjet allows a wider variety of inks than thermal inkjet as there is no requirement for a volatile component, and no issue with kogation buildup of ink residue, but the print heads are more expensive to manufacture due to the use of piezoelectric material usually PZT, lead zirconium titanate. A DOD process uses software that directs the heads to apply between zero and eight droplets of ink per dot, only where needed. Piezo inkjet technology is often used on production lines to mark products. For instance, the use before date is often applied to products with this technique in this application the head is stationary and the product moves past. Requirements of this application are high speed, a long service life, a relatively large gap between the print head and the substrate, and low operating cost. Ink formulationseditThe basic problem with inkjet inks is the conflicting requirements for a coloring agent that will stay on the surface vs. Desktop inkjet printers, as used in offices or at home, tend to use aqueous inks based on a mixture of water, glycol and dyes or pigments. These inks are inexpensive to manufacture, but are difficult to control on the surface of media, often requiring specially coated media. HP inks contain sulfonated polyazo black dye commonly used for dyeing leather, nitrates and other compounds. Aqueous inks are mainly used in printers with thermal inkjet heads, as these heads require water to perform. While aqueous inks often provide the broadest color gamut and most vivid color, most are not waterproof without specialized coating or lamination after printing. Most Dye based inks, while usually the least expensive, are subject to rapid fading when exposed to light or ozone. Pigment based aqueous inks are typically more costly but provide much better long term durability and ultraviolet resistance. Inks marketed as Archival Quality are usually pigment based. Some professional wide format printers use aqueous inks, but the majority in professional use today employ a much wider range of inks, most of which require piezo inkjet heads and extensive maintenance Solvent inks. The main ingredient of these inks are volatile organic compounds VOCs, organic chemical compounds that have high vapor pressures.