What are the reasons for color difference in packaging box printing?

The color difference in packaging box printing is defined as the difference between the printed color and the target color. The target color is the expected color to be printed, while the actual printed color is influenced by various factors such as printing machines, ink, paper, etc. Color difference can be measured using different measurement methods and expressed in international standard values. Common methods for representing color difference include LAB color difference and E color difference, among others. These measurement methods can help determine the degree of difference between ideal colors and actual printed colors, thereby ensuring that the quality of printed products meets customer requirements.

The main reasons for color difference are as follows:

Printing machines: Different printing machine models, equipment states, or service lives may result in different color expressions in printing, leading to color differences.

Ink: The quality of ink, the stability of color paste, and the storage environment can also affect the stability and accuracy of printed colors. If the quality of the same batch of products cannot be guaranteed to be consistent when using ink in different printing processes, color difference problems may also occur.

Paper: Different paper materials determine the degree of ink absorption and have a significant impact on color expression.

Human factors, such as the skill level of operators and the quality of plate making, directly affect the color consistency of printed materials. In summary, the color difference in printing is caused by the interaction between different factors. If these factors are controlled and quality stability is ensured, the probability of color difference can be greatly reduced.

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