Imagine that we buy a monitor and its input does not match our video card, even though it has the same type.That's why certain standards apply. In polygraphy and graphics, such standards also exist - appropriate definitions of CMYK colors - key for the appropriate color reproduction.
Specified in advance formats for printing leaflets and business cards, so that they are comfortable and as uniform as possible.Without standards, even leaflets could be completely unreadable and even repulsive.
Solid ink printers, also known as phase-change printers, are a type of thermal transfer printer.They use solid sticks of CMYK-coloured ink, similar in consistency to candle wax, which are melted and fed into a piezo crystal operated print-head.
Solid ink printers are most commonly used as colour office printers, and are excellent at printing on transparencies and other non-porous media.
Solid ink printers can produce excellent results.
Acquisition and operating costs are similar to laser printers.
Drawbacks of the technology include high energy consumption and long warm-up times from a cold state.
Also, some users complain that the resulting prints are difficult to write on, as the wax tends to repel inks from pens, and are difficult to feed through automatic document feeders, but these traits have been significantly reduced in later models.
In addition, this type of printer is only available from one manufacturer, Xerox, manufactured as part of their Xerox Phaser office printer line.
Previously, solid ink printers were manufactured by Tektronix, but Tek sold the printing business to Xerox in 2001.Źródło: https://en.wikipedia.org/wiki/Printer_(computing)
That is why printing plants limit the amount of services provided. .