Inkjet/Laser printers
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How does a Bubblejet printer work?
It uses tiny resistors to create a heat bubble, which then forces ink out of a tiny nozzle as it expands. When the bubble collapses, it creates a vacuum sucking more ink into the cartridge.
How does a Piezoelectric Inkjet printer work?
It applies an electrical charge to piezoelectric crystals which vibrate inwards causing it to push ink out of a nozzle. When the crystals vibrate, it causes a vacuum which further causes more ink to draw into the cartridge.
Advantages and disadvantages of laser printers
PROS: - Cheaper to run - Better print quality CONS: - Print quality inferior to inkjet on photographic paper - Expensive to buy
Advantages and disadvantages of Inkjet:
PROS: - Cheap to buy - Good image quality if used with photographic paper CONS: - Higher running costs as it uses a lot of ink - Printing bleeds through paper
How does a laser printer work?
It uses a laser beam to give a photoreceptor drum a static charge. The static electricity causes toner to be attracted to the positively-charged areas of the drum. As the paper approaches the drum, it is given a strong positive electrical charged, which causes the toner to transfer onto the paper. The paper goes through a pair of rollers where the toner fuses into the paper.