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
Black inks for printers
Various types of printer inks are available for sale. They are mainly divided into black and color inks having different capacities. Standard sizes of printer inks are purchased by people with the highest quality printers who do not want to make too many prints or prefer to buy accessories that have generally accepted sizes. In contrast, large printer inks can be bought by people who want to make a large number of prints or make some savings. This is because large-size printer inks are usually slightly cheaper or covered by special promotions that make them really attractive.
Colorful magazines and leaflets
Everyone likes colorful magazines or leaflets. But what would the world of marketing and advertising look like if it were not for printing and printing? Today, such things are produced on a mass scale, expenditures are increasing, because demand is growing all the time.
Nowadays, there is no company that at least once would not use the services of a printing company - leaflets, business cards or a small banner, it's almost a standard for every company. From small ones to big ones? it is known that on a different scale. However, you can still see badly marked or un-promoted brands, the reason for this may be the lack of investment in printing advertising materials.