What is the difference between spot color printing and four-color printing?

   In printing terms, we often hear the words four-color printing and spot-color

printing, which are widely used in printed matter. But most people don't know

when to choose four-color printing and when to choose spot-color printing in

actual production. Today, let's discuss spot color printing and four-color

printing from concept, difference to application.

   Four-color printing uses CMYK. In layman's terms, that is to use the different

superposition of these four colors to get the required color. As long as the color

has a gradient, it is all four-color overprinting. Four-color printing is superimposed

with dots. You can see different colors with a magnifying glass. outlets. Spot color

printing refers to the printing process that uses other color inks other than yellow,

magenta, cyan, and black inks to reproduce the original color. In packaging printing,

spot color printing is often used to print large areas of background color. Spot color

printing is a single color without gradients, the pattern is solid, and the dots

cannot be seen with a magnifying glass.

   What is the difference between the two printing visual effects? Spot color printing

has lower color brightness and higher saturation; spot color blocks with uniform ink

color are usually printed on the spot, and the amount of ink should be increased

appropriately. When the thickness of the ink layer on the layout is large, Changes

in the thickness of the ink layer will reduce the sensitivity to color changes,

so it is easier to get a uniform and thick printing effect.

   The color blocks overprinted by the four-color printing process are prone to

change in color intensity due to changes in the thickness of the ink layer and

changes in the printing process conditions. A change in dot gain, resulting in

a color change. Therefore, it is not easy to obtain the effect of uniform ink color

in the color blocks overprinted by the four-color printing process. From the

perspective of economic benefits, it mainly depends on whether the use of spot

color printing technology can save the number of overprints. Because reducing

the number of overprints can not only save printing costs, but also save

the cost of prepress production.