Analyzes the Reasons for Ink Mottle in Letterpress Printed Products

In the field of packaging box printing, ink mottle in letterpress printed products is one of the common problems affecting product quality. Zemeijia is well aware of the importance of this issue to customer satisfaction. Therefore, Zemeijia has conducted an in depth analysis of the reasons for ink mottle in letterpress printed products to provide higher quality printing services.

Is the Material of the Printing Plate Base Suitable?

The characteristics of the printing plate base material have a direct impact on the printing pressure and ink quality. Traditional plywood materials used as printing plate bases have defects such as poor solidity and easy deformation, which can easily lead to the ink layer on the plate not being transferred evenly to the printed matter, resulting in ink mottle. To avoid this problem, Zemeijia uses metal plate bases, such as magnetic plate bases and aluminum plate bases.

Is the Machine Adjustment Proper?

Machine aging or improper adjustment is also an important factor leading to ink mottle. When parts such as the roller shaft, bearing and gear of the machine are worn or loose, they will affect the stability and uniformity of printing pressure and plate ink, thereby causing ink mottle. In addition, the improper position of the ink roller can also easily cause ink mottle in printing. Zemeijia pays attention to the daily maintenance of the equipment to ensure that the key parts of the machine are in good lubrication condition to prevent wear and looseness.

The solution to the problem of ink mottle in letterpress printed products needs to start from the selection of printing plate base materials and the adjustment of the machine. Zemeijia has successfully overcome these problems and provided customers with high quality printing services to ensure the appearance quality and market competitiveness of packaging box products.