The laser printer uses a laser beam reflected from a mirror to attract ink dust, called toner , to selected paper areas as a sheet rolls over a drum. Color is important for users who need to print pages for presentations or maps and other pages where color is part of the information. Cheap color printers can hold only one cartridge at a time while more expensive printers can use two ink cartridges, one color and one black ink. Most inexpensive printers provide sufficient resolution for most purposes at 600 dpi. The average printer prints out black text anywhere from 3 to 8 sheets per minute.
Color printing is slower.
Generally, the more you pay the better preformance you will get. Laser printers can be upgraded. Print jobs spool to either printer memory or the computer memory. If the job uses the computer memory performance of further use can be effected until the print job is finished. A USB port is being added to newer printers.