- These are devices used for printing a information on the paper.
- Printing clarity of the image depends on the DPI.(i.e., Same Like PPI).
What is DPI?
- DPI is nothing but Dots Per Inch.
- How many dots did printer prints per an Inch.
- Clarity of the image is obtained by the more DPI.
Types of Printers:
There are lots of printers, but below are the printers which are mostly used.
Laser Printer.
Ink Jet Printer.
Thermal Printer.
Dot Matrix Printer.
Below is the differentiation:
| LASER | INK JET | THERMAL | DOT MATRIX | |
|---|---|---|---|---|
| Image |  |
 |
 |
 |
| Established Year | 1969 | 1951 | 1972 | 1925 |
| Cartridge | Toner (Plastic Powder) | Ink | No Cartridge (Uses Thermal Paper) | Color Coated Ribbon |
| Print Mechanism | Uses Lasers or LED to make print path on the paper | Ink is dropped through small Nozzles, by pressing the ink filled sponge | Uses Thermal Device to heat paper for printing the paper black | Uses to Pins to press the coated ribbon on the paper |
| Printing Speed | 15 to 100 Pages Per Minute | 16 Pages Per Minute | 500 Characters Per Second | 30 - 1550 Character Per Second |
| DPI | 600-2400 DPI | 300-720 DPI | 200-600 DPI | 60-90 DPI |
| Color/ Black and White |
Best For Color and Black & White | Best for Color and Black & White | Not Recommended For Color | Best For Black and White |
| Health Hazards | Powder Make effects to the breathing | No Health Consequences | Thermal Paper is Chemical Paper which is not good for use. | No Health Consequences |