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Revision as of 04:58, November 21, 2016
, 04:58, November 21, 2016→Methods: sorta had that a little mixed up. Expanded too
===Inkjet===
===Inkjet===
Inkjet printers are popular, since they offer several advantages. These include high-quality printing, inexpensive printers, and quiet operation. However, inkjet printers use proprietary ink cartridges, which are usually expensive, and this ink tends to fade over time, so the product does not last as well as it might if printed differently.
Inkjet printers are popular, since they offer several advantages. These include high-quality printing, inexpensive printers, and quiet operation. However, inkjet printers use proprietary ink cartridges, which are usually expensive, and this ink tends to fade over time, so the product does not last as well as it might if printed differently. They operate by ejecting small drops of ink onto the paper as needed. This process (called drop-on-demand) can be performed several different ways.
====bubblejet====
The most common method of inkjet printing uses the bubblejet technique. Resistors in the print head are used to produce heat which vaporizes some of the ink, creating a bubble. This bubble of gas propels a droplet of liquid ink out of the head and onto the medium.<ref>http://computer.howstuffworks.com/question163.htm</ref>
====Piezoelectric (piezo)====
Piezoelectric printers use, as the name implies, piezoelectric crystals to generate the required ink jets. Small quantities of one or more of these selected materials are placed in the print head. When power is applied to the material, it changes shape, pushing a small droplet of ink out onto the medium.<ref>http://computer.howstuffworks.com/inkjet-printer3.htm</ref>
====Care and maintenance====
====Care and maintenance====
Since these printer use powder toner, they tend to get quite dirty over time, and should be cleaned periodically. However, compressed air should not be used in most cases, since the toner may become lodged in more vital areas, and this will generally make a mess of the surrounding area. Cold water on a cloth is usually the best option for cleaning most surfaces, and [[isopropyl alcohol]] cleans the rollers well.
Since these printer use powder toner, they tend to get quite dirty over time, and should be cleaned periodically. However, compressed air should not be used in most cases, since the toner may become lodged in more vital areas, and this will generally make a mess of the surrounding area. Cold water on a cloth is usually the best option for cleaning most surfaces, and [[isopropyl alcohol]] cleans the rollers well.
===Dot Matrix===
===Dot Matrix===
Dot Matrix printers are a kind of impact printer, which is not used nearly as much as it once was. However, they still have their uses since printing is inexpensive and they can produce multiple copies using thermal transfer or carbon paper. Unfortunately, these printers are very noisy, offer poor print quality, and use proprietary ink cartridges. Rather than having set dies for each letter, as some early impact printers did, a dot matrix printer uses pins to form the desired shapes. When printing:
Dot Matrix printers are a kind of impact printer, which is not used nearly as much as it once was. However, they still have their uses since printing is inexpensive and they can produce multiple copies using thermal transfer or carbon paper. Unfortunately, these printers are very noisy, offer poor print quality, and use proprietary ink cartridges. Rather than having set dies for each letter, as some early impact printers did, a dot matrix printer uses pins to form the desired shapes. When printing: