Basic Knowledge of inkjet printer
Types of ink
1. DYE BASE INK
Dye is a colorant that is fully dissolved into the carrier fluid, and the resultant ink is a true solution. Once dissolved into the carrier fluid, a well-made dye should never separate or settle out. The analogy of dye ink is that it's like diluting a fruit juice with water, Once stirred, it never separates again - no matter how long you leave it
Characteristic of dye based ink :
Dye based ink develop become dye sublimation ink
the advantage is dye sublimation ink can be transfer print image with heat process on special media, like cloth , ceramic, mug, etc.. with sublimation paper.
There is two step process :
2. PIGMENT INK
Pigment is a very fine powder of solid colorant particles suspended or dispersed throughout the carrier fluid. The analogy for a pigment ink is that it resembles sandy-colored water in a river or at sea. If you look closely, you can see the particles of sand dispersed throughout the water.
Characteristic of Pigment ink :
Pigment ink develop become :
All that type have characteristic super durability from gas, water, UV and longetivity.
Inkjet Printer Technology
Inkjet printer have 3 kinds technology: thermal, piezoelectric and continuous.
1. THERMAL PRINTHEAD
All thermal printheads work according to the same basic principles.
There are two configuration types for thermal ink jet: Roof-shooters and Edgeshooters.
Issued by Hewlett-Packard and Lexmark, ejects ink directly forward of the resistor. This results in a shorter bubble flight distance, which translates into greater drop repetition capability. In a roofshooter, the ink supply is located beneath the resistor. This enables the ink supply to absorb the excess heat that is generated, there by decreasing the potential for overheating.
Employed by Canon and Xerox, eject ink to the side of the heater. This longer flight distance has traditionally resulted in less precise drop repetition. Edgeshooters, however, are a more simple design, are more easily manufactured and have remained a popular lower cost alternative. Advances in edgeshooter design have improved performance, and drop repetition equal to a roofshooter is now possible.
2. Piezoelectric printHead
piezoelectric printheads rely on the generation of an electric field and the subsequent deformation of a special ceramic material. This in turn triggers an ink volume change in the pressure chamber, forcing the ink through the nozzle and onto the recording media. Large ink volume displacement is necessary for drop formation, so the physical size of the driver is often much larger than the nozzle, creating a size constraint in the design of the printhead.
The market leader in the use of piezoelectric head technology in desktop printers to date has been Epson.
printhead technology has been the ability to achieve very high resolution (2880 dpi) and “photo” quality printing.
3. Continuous inkjet (CIJ)
In addition to drop generation techniques, CIJ must also include drop deflection, and ink collection and recirculation methods to harvest and recycle ink that is not applied to the substrate.
Inks used in CIJ applications must be conductive.
CIJ is popular for industrial type applications such as bar coding, product labeling and box printing