CMYKtryck

CMYKtryck, or CMYK printing, refers to the process of reproducing color images using four process inks: cyan, magenta, yellow and black (K). The CMYK model is subtractive: when these inks are applied to white paper, they absorb light and produce perceived colors. By varying the density and combination of the four inks, a wide range of colors can be created, though the CMYK gamut is smaller than the RGB gamut used for digital displays.

In practice, most color images originate in RGB and are converted to CMYK for print through color management. This conversion relies on ICC profiles that relate device-specific color spaces to the target substrate and printing press. Soft proofs and press proofs help predict on-screen and real-world results, while color separation creates the four printing channels (or plates) for offset lithography or the four ink channels for digital printers.

Printing uses halftone screening to reproduce continuous tones with tiny dots. Dot gain, where dot size increases during printing, can affect color accuracy and contrast, making calibration and proper screening essential. Substrate characteristics—paper type, brightness, coating, and ink absorbency—also influence color perception and ink density.

CMYK printing is widely used for magazines, newspapers, packaging, and general commercial printing due to its cost efficiency and suitability for mass production. For precise corporate colors, printers may supplement CMYK with spot colors (Pantone or custom inks) or extend the process with additional inks.