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Wikipedia about laser printing
Laser printing is an electrostatic digital printing process. It produces high-quality text and graphics (and moderate-quality photographs) by repeatedly passing a laser beam back and forth over a negatively charged cylinder called a "drum" to define a differentially charged image.1 The drum then selectively collects electrically charged powdered ink (toner), and transfers the image to paper, which is then heated in order to permanently fuse the text, imagery, or both.
As with digital photocopiers, laser printers employ a xerographic printing process.
However, laser printing differs from analog photocopiers in that the image is produced by the direct scanning of the medium across the printer's photoreceptor.
This enables laser printing to copy images more quickly than most photocopiers.Źródło: https://en.wikipedia.org/wiki/Laser_printing
Connecting printers with a scanner
Sales of printers with a scanner is now a very good way to run a profitable business.
This is because these types of printers have many customers who want to own them in their homes or companies.
Therefore, both small printers with an additional scanner and large scanning devices go on sale.
They work perfectly in offices, schools, in the back of the shop or at universities.
Therefore, it is not uncommon to sell printers with a scanner, and then you can order almost any number of such devices and they will be delivered almost instantly to the delivery address.
Toner service for printers
Regeneration of printer toner allows you to use them for a longer period of time. Thanks to this, you do not have to pay additional costs to replace them.
It should be admitted that people who use toners installed in large printers for the first time may have problems with placing them in the printer in such a way that a large number of good quality prints can be made.
That is why there is no shortage of such professionals who work on printer toners.
They have the appropriate knowledge and tools that allow them not only to replace the toners, but also to repair the entire printing device, if such an order will receive from the incoming customer. Thanks to this, they can fully develop their business.