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# How does a laser printer work?
**What are the general steps that a laser printer takes to put a print on a piece of paper?**
The general steps that a laser printer takes to put a print on a piece of paper are:
1. The laser beams a print onto a metal drum.
2. The drum uses static electricity to attract powdered toner to the drum's cylinder.
3. The drum rolls the toner onto the paper in the form of the print.
4. The toner is melted and pressed onto the paper by heat from a fuser as it passes through the rollers.
5. The paper comes out of the printer with the print on it.
# What does a laser printer do?
**What was the first type of printer invented?**
The first type of printer invented was *the laser printer.*
> **Who invented the laser printer and when?**
> The laser printer was invented by *Gary Starkweather while working in the Xerox product development team in 1969.*
# Do laser printers need ink?
**What do laser printers use instead of ink?**
Instead of ink, laser printers use *colored powder called toner.*
# Are laser printers better than inkjet printers?
**What is the advantage of laser printers?**
The advantage of laser printers is that *they can print from thousands to tens of thousands of pages with a single toner cartridge.*
# Step-by-Step
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# Toner Cartridge
**What is toner?**
Toner is *a positively charged colored or carbon / iron oxide powder.*
> **What are the four colors that toner cartridges come in?**
> The four colors that toner cartridges come in are:
> 1. Cyan.
> 2. Magenta.
> 3. Yellow.
> 4. Black.
# Drum unit
**What is a drum unit?**
A drum unit is *a metal cylinder with a special coating.*
> **What does the special coating on a drum unit allow it to do?**
> The special coating on a drum unit allows it to *receive a static positive and negative charge from the laser.*
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> **How does a drum unit receive its initial charge?**
> A drum unit receives its initial charge *from a heated corona wire during the warm up process.*
# Laser
**What does the laser do?**
The laser *transmits light from the diode across a series of mirrors.*
> **Where do the mirrors inside a laser printer guide the laser to and why?**
> The mirrors inside a laser printer guide the laser to *the drum unit in order to imprint the shape of the intended print.*
# Transfer belt
**What does the transfer belt do?**
The transfer belt *moves the paper through the printer.*
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# Fuser unit
**What is a fuser unit?**
A fuser unit is *a heated roller.*
> **What does a fuser unit do?**
> A fuser unit *melts the toner particles onto the page as it passes through.*