Color print is red, yellow, Portland, and four-color ink printing paper products in line with the formation of color images, This principle is known as CMYK, it is widely used in the four-color offset technology.

• 彩色印刷品是把红、黄、兰、黑四色油墨印制在纸制品上来形成彩色图象，这种原理被称为CMYK，它被广泛应用于四色胶印技术。