Causes and Solutions for Pinholing and White Exposure in Solid Black Printing

In the packaging box manufacturing industry, solid black printing is a common process requirement, but the phenomenon of pinholing and white exposure frequently occurs, affecting the overall aesthetics of the product. Based on years of industry experience, Zemeijia has thoroughly analyzed the causes of pinholing and white exposure in solid black printing and proposed targeted solutions, striving to provide customers with even more perfect packaging solutions.

Why Does Solid Black Printing Easily Lead to Pinholing and White Exposure?

This is primarily due to the mismatch between the surface sizing process of the base paper and the printing ink used. To enhance burst strength and moisture resistance, base paper typically undergoes surface sizing treatment. However, excessive sizing can lead to reduced ink absorption performance of the carton during the printing process, especially when printing solid black areas, making it more prone to pinholing and white exposure.

How to Effectively Avoid Pinholing and White Exposure in Solid Black Printing?

Zemeijia recommends several solutions: first, selecting high-quality ink with finer color paste particles and a more uniform distribution to improve printing quality; second, appropriately increasing the ink laydown to ensure that the printing ink fully covers the paper surface; and third, adjusting the ink's pH value and, if necessary, adding chemical additives to improve ink adhesion and penetration.

In summary, when faced with the issue of pinholing and white exposure in solid black printing, Zemeijia has adopted targeted solutions aimed at providing customers with higher-quality packaging products. In the future, we will continue to uphold the attitude of striving for excellence, continuously explore and practice, and promote the continuous advancement of packaging box printing technology.