Inkjet/Laser printers

Question 1

How does a Bubblejet printer work?

Answer 1

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.

Question 2

How does a Piezoelectric Inkjet printer work?

Answer 2

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.

Question 3

Advantages and disadvantages of laser printers

Answer 3

PROS:
- Cheaper to run
- Better print quality

CONS:
- Print quality inferior to inkjet on photographic paper
- Expensive to buy

Question 4

Advantages and disadvantages of Inkjet:

Answer 4

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

Question 5

How does a laser printer work?

Answer 5

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.