During the cardboard printing process, ink offsetting is a common issue. The primary causes of ink offsetting are problems with the ink and paper. So, how can we address the ink offsetting problem during production?

Ink: Pay attention to ink viscosity and wear resistance.

One of the causes of ink offset is the issue of ink viscosity. High ink viscosity slows down the drying process of the ink, and when the ink does not dry quickly, it is more prone to offset. Therefore, reducing ink viscosity is a good method to overcome ink offset.

Tip: If there is a color deviation after the viscosity is reduced, increasing the colorant content in the ink can ensure the accuracy and stability of the ink color.

Next is the wear resistance of the ink. The wear resistance of ink is mainly reflected in its cohesion and adhesion. When the cohesion and adhesion of the ink decrease, its wear resistance worsens, which is closely related to the ink itself.

Tip: If the ink has dried after printing and there is significant ink transfer upon wiping with a hand or paper, it indicates poor ink abrasion resistance. This calls for the addition of an abrasion-resistant agent or remaking the ink.

Paper: Low water absorption

Low absorbency of paper naturally reduces the absorbency of ink, making it easy for ink to float on the paper's surface and cause off-set.

Tip: If the paper has poor absorbency, start the improvement from the web. Firstly, increase the heat absorption of the face paper, which breaks the face paper fibers and the sizing layer of the paper through heat, thereby enhancing the paper's ink absorption. Additionally, increase the usage of ink penetration agents during printing to better prevent ink offset.

In summary, deinking is a common occurrence, with various reasons for each instance. Only by identifying the true cause and then seeking appropriate methods for improvement can better results be achieved.