Solution

The Relationship Between Paper Properties and Print Color Appearance

The Relationship Between Paper Properties and Print Color Appearance

As the primary raw material for printing, the performance of paper directly determines the quality of printed ink colors. Only high‑quality paper can deliver superior color reproduction in printed materials. Therefore, a thorough understanding of the relationship between paper properties and print coloration, coupled with the judicious selection of paper based on the specific characteristics of the printed product and the production process, is crucial for enhancing product quality.

How can color shifts and moiré patterns be eliminated in color printing plate-making?

How can color shifts and moiré patterns be eliminated in color printing plate-making?

During color plate-making, the screen angles should be determined according to the primary and secondary importance of the original artwork’s colors. Because a 45° angle is particularly sensitive to the human eye, the main color plates are typically set at 45°, while the other colors are assigned angles of 15°, 75°, and 90° in sequence. During the printing reproduction process, halftone dots intersect at different angles, forming various patterns; among these, the cross-shaped pattern delivers the best color rendition, followed by the chevron pattern. When creating four-color plates, only the strong colors—black, blue, and red—can effectively form patterns, whereas yellow is a weak color that does not contribute to pattern formation but merely serves to modulate hue. Therefore, when setting the screen angles for the four colors, the angular differences between black, blue, and red should be maintained at 30° intervals. This approach not only enhances color fidelity but also helps prevent the common issue of moiré patterns caused by adjacent screen angles differing by just 15°. Even if, during plate-making, we select the aforementioned screen angles for each color,