Firstly, we need to understand that color printing is made through CMYK four color printing. CMYK represents cyan, magenta, yellow, and black. The combination of these four colors can present the rich and colorful world we see. However, due to the particularity of printing and substrate, there is often a certain difference in color between finished printing and display.

So, why is there such a difference? Firstly, we need to understand that the colors on the monitor are in RGB mode, while the printed material is in CMYK mode. These two modes have significant differences in color presentation. The RGB color mode is mainly used for screen displays, such as computers, televisions, etc., with rich and bright colors. The CMYK color mode is the main color mode for image printing, with soft and natural colors. Therefore, when the color we see on the monitor is different from the color of the printed material, it is mainly due to the difference in these two color modes.

In addition to the above reasons, we also need to consider that there may be slight differences between different batches of products. Even if the same ink and printing machine are used, there may be slight differences between consecutive printing batches due to factors such as temperature and humidity in the printing environment.

So, how to correctly determine color difference? According to the international offset printing standard ISO12647-2, a color difference value controlled within ± 10% of the printed product is considered a qualified product. That is to say, if your printed material has color difference within this range, it meets industry standards.