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A laser printer applies toner through a controlled electrostatic charge, and may be in the range of 600 to 2,400 DPI. The DPI measurement of a printer often needs to be considerably higher than the pixels per inch (PPI) measurement of a video display in order to produce similar-quality output. This is due to the limited range of colours for ...
The ideal pixel density (PPI) depends on the output format, output device, the intended use and artistic choice. For inkjet printers measured in DPI it is generally good practice to use half or less than the DPI to determine the PPI. For example, an image intended for a printer capable of 600 dpi could be created at 300 ppi.
In September 1997, HP introduced the host-based LaserJet 6L, which could print 600 dpi text at up to six pages per minute for only US$400. [17] 1200 dpi printers have been widely available in the home market since 2008. 2400 dpi electrophotographic printing plate makers, essentially laser printers that print on plastic sheets, are also available.
Lines per inch (LPI) is a measurement of printing resolution. A line consists of halftones that is built up by physical ink dots made by the printer device to create different tones. Specifically LPI is a measure of how close together the lines in a halftone grid are. The quality of printer device or screen determines how high the LPI will be.
A thermally compliant print head, in combination with the electrical properties of the ribbon and the correct rheological properties of the ribbon ink are all essential in producing a high-quality printed image. Print heads are available in 203 dpi, 300 dpi and 600 dpi resolution options.
The standard performance for card printing is 300 dpi (300 dots per inch, equivalent to 11.8 dots per mm). There are different printing processes, which vary in their detail: Thermal transfer Mainly used to personalize pre-printed plastic cards in monochrome.
The 4L used the 300 DPI [8] PX engine, with the 4P using the upgraded 600 DPI [9] PX-II engine. [1] The 4L was the first LaserJet with power-saving technology that turned off the printer when not in use. [ 5 ]
Early thermal heads ran at just 600–700 dpi [14] but improvements by HP increased the firing range of 8–12 kHz per chamber and as high as 18 kHz with 5-picoliter drop volume by the year 2000. Thermal printheads do not have the power of piezo DOD or continuous inkjet, so the gap between the face of the head and paper is critical.
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1747 Olentangy River Rd, Columbus, OH · Directions · (614) 299-9425