Jetprint employs a seven-color printing process to produce all the colors of traditional Chinese painting. In addition to the CMYK color model (cyan, magenta, yellow, and key), the process also makes use of light magenta, light cyan, and light key.
諶懷椿指出，C、M、Y、K 為彩色印刷 4 原色，分別是藍、洋紅、黃、黑，再加上淡色系的 LM（淡紅）、LC（淡藍）、LK（灰色）共 7 支墨水匣，就能印出中國古畫所有的顏色。