Digital printing

Digital printing usually involves mapping the colours in a digital file (JPEG, PNG, SVG) to the CMYK colour model and printing the data onto paper using cyan, magenta, yellow and black inks.

  • Digital printers typically overlay highly reflective white paper with cyan, magenta, yellow and black inks or toner.
  • Printing has a smaller gamut than TV, computer and phone screens which rely on light emission, rather than reflection.
  • Digital displays produce comparatively brighter colours than printers because the amplitude of each wavelength of light is larger than can be achieved by a printer.
  • Digital printers produce dull and less intense colours than displays because the amplitude of each wavelength of light is smaller when light is reflected off paper through inks.
  • A display device, such as a computer screen, starts off dark and emits red, green and blue light to produce colour.
  • CMYK inks are the standard for colour printing because they have a larger gamut than RGB inks.
  • Highlights are produced on digital printers by printing without black to allow the maximum amount of light possible to shine through and reflect off the paper.
  • Mid tones rely on the brightness and transparency of the inks and the reflectivity of the paper to produce fully saturated colours.
  • Shadows are produced by adding black to both saturated and desaturated hues.

Summary

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References
  • https://en.wikipedia.org/wiki/Digital_printing