True color image divided into tinted

Quick answer：

In the printing industry, true color images are sometimes divided into 'tints' or 'halftones' to be printed on presses that use a limited color palette, such as four-color process (CMYK). This process involves creating multiple plates, each with varying densities of the four process colors to simulate a wide range of shades and tones. The result is a continuous tone image that closely resembles the original true color image.