Changes

The main problem these printers experience is clogging of the print heads.  They can usually be cleaned fairly easily using [[isopropyl alcohol]]. However ,the printer must be opened up and the print heads removed to do this, and once done, the printer usually must print one or more alignment sheets (which consumes expensive ink).  Many Inkjet printers have the print heads on the actual ink cartridges, which means that each time the cartage is replaced, so is the head.

The main problem these printers experience is clogging of the print heads.  They can usually be cleaned fairly easily using [[isopropyl alcohol]]. However ,the printer must be opened up and the print heads removed to do this, and once done, the printer usually must print one or more alignment sheets (which consumes expensive ink).  Many Inkjet printers have the print heads on the actual ink cartridges, which means that each time the cartage is replaced, so is the head.

===Laserjet===

===Laser===

This printing method uses a laser to "paint" the desired image onto a photosensitive imaging drum. Toner is then picked up by the drum, and transferred to the paper.  Heat an pressure are then applied to the paper to fuse the plastic-based toner to the sheet. Black printer one go through this process once, but color printer must do so four times.  There are four photoreceptive drums, one is used for each color--yellow, magenta, cyan, and black.  Each drum prints its color onto a belt, then a transfer roller moves the toner to the paper.<ref name="escotal.com">http://www.escotal.com/printer.html</ref> The printing process is as follows:

The laser printing method uses a laser to "paint" the desired image onto a photosensitive imaging drum. Toner is then picked up by the drum, and transferred to the paper.  Heat an pressure are then applied to the paper to fuse the plastic-based toner to the sheet. Black printer one go through this process once, but color printer must do so four times.  There are four photoreceptive drums, one is used for each color--yellow, magenta, cyan, and black.  Each drum prints its color onto a belt, then a transfer roller moves the toner to the paper.<ref name="escotal.com">http://www.escotal.com/printer.html</ref> The printing process is as follows:

#Processing: Construct the page in memory

#Processing: Construct the page in memory

#Charging: Put an negative electrostatic charge on the imaging drum

#Charging: Put an negative electrostatic charge on the imaging drum