Colors printing Used CMYK format to Print

With colour printing, it is important to remember that what you see on a screen will always be slightly different in print. Colour on a screen reacts to the brightness of the light behind it, where as ink will respond the brightness of the paper it is printed on. When approaching colour for print, you will notice there are a few different colour modes available including RGB and CMYK.


RGB is the colour system used for screen and stands for:
R – red      G – green      B – blue

Colour for print is always in CMYK format. Sometimes referred to as four colour or process colour. CMYK stands for:
C – cyan      M – magenta      Y – yellow      K – black
CMYK enables each colour to be printed a layer at a time. CMYK printing uses very fine dots of colour, called a halftone, that once layered together creates a solid image. This layering system is used in offset printing to create your image, therefore all artworks going to print must be in CMYK format.

When you want to print your exercise book cover , production department use CMYK format to print your book cover and inner layout , to make nice print for your book order . So the artwork needed to be CMYK format .