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laser printers?

i;ve been looking for a cheep second hand laser printer. obviously the cartridge holds the ink ( is it powder ). So what are toners & drums and can there be more than one consumable part inside. big thanks

Public Comments

1. toner is (ink) then its baked on to the paper with a heated roller
2. The actual process of laser printing is a bit complicated, but the consumables are both the toner (the fine powder that acts like the ink) cartridges and the electrostatic light-sensitive drum that transfers it onto the paper (they don't last forever). Be aware that both of these are VERY expensive.
3. 1) Yes, the "toner" powder is the "ink", so to speak, in the cartridge. 2) Generally the drum and toner are engineered to be in a single user-replaceable "cartridge". There are some that have separate toner bottles and drums, such as Kyocera EcoPrint, which has a ceramic "almost infinite pages" drum, but that costs more. 3) Consummable... Usually just the cartridge, occasionally there's the ozone filter.