Multi-colour printing is process of creating shading impressions (generations) by progressive imprinting on paper or other material from plates on a machine or press.nShading generations can be made by any strategy (alleviation, plane, or gravure printing). The creation of a shading print with a specific number of tones is common. The quantity of plates from which the prints are made relates to the quantity of shadings used. Four-colour printing is the method applied in all advanced print measures for colour propagations. This comprises of the four colours: cyan, magenta, yellow and key (dark) – CMYK for short. Hypothetically all colours can be blended from the three subtractive essential colours cyan, magenta and yellow.