High fidelity screen printing technology introduction (2)

3. Hybrid Screening Features

In order to make full use of the advantages of AM and FM screening to avoid the deficiencies of both, AM and FM hybrid screening technologies are now introduced. Hybrid screening is similar to FM screening in high-light areas and dark-tone areas. The level changes in the screen are represented by the degree of fineness of the same size and fine mesh points. The positions of the dots are randomly distributed and processed through special calculations so that the dots do not overlap each other and the dots do not become too large. In order to adapt to printing, another calculation method has been added, that is, using a plurality of small dots to form a larger printing dot. In the midtone region, the position of the dot is random, and at the same time, the size of the dot can be changed like the amplitude modulation and screening. Therefore, the midtone mesh has both the distribution characteristics of the FM mesh and the tone representation of the AM mesh.

Hybrid screening has the following features:

(1) Due to the special treatment of the positions of the highlights and shadows, the particles in this part are much less compared to the FM screening. In addition, a combination of small network points is calculated to improve the reproducibility and stability of replication.

(2) In the midtone region, because of the randomness of the dot position, the color skipping of the AM screening is avoided. In this meal, since the number of intermediate tone dots is fixed, the dot density per unit area can be calculated, so that the dot density of midtones can be defined. For the printing process, conventional precision production processes and equipment can be used to achieve high-line print quality without compromising bio-efficiency.

Mixed screening technology is accompanied by the CTP technology came into being, such as FAIRDOT and screens will be reached the Canadian network, which is aimed at high-precision printing and launched the mixed screening technology for CTP. As the core of CTP technology digital proofing, it also introduced its own hybrid screening proofing technology that imitation real network technology. This hybrid screening technology can not only express the color incisively, but also show the problems in the CTP process flow at a glance. Therefore, hybrid screening will be the best choice for image reproduction in the future. Combined with thermal CTP imaging technology, it can produce clearer, more replicable dot quality.

High-fidelity color for high-fidelity printing

Before naming high-fidelity outlets. First understand high-fidelity printing. Since existing paper and ink cannot fully reproduce the color gamut of natural color originals, in order to improve the saturation of certain colors on prints, the pure, bright red color is printed on the basis of four colors of C, M, Y, and K. Colors such as green, blue and purple can create a more natural contrast and a fresher sense of color in printed images. This type of printing is called high-fidelity printing. For example, when printing a picture of strawberries, the red and green versions can be added, so that the red color of the strawberry fruit and the green color of the green leaves appear more pure and lifelike. The whole picture appears vivid and vivid.

The dot distribution in FM screening is irregular, and the distribution of silver salt particles in photographic negatives and photos is also irregular. As long as the dots in the FM screening are small enough, the printed matter can fully approach the original and achieve high fidelity. Since the frequency modulation screen is not limited by the shallow angle of the screen and the color reproduction range is wide, it can produce special printing that can not be achieved by conventional four-color separation, and can perform multi-color printing of four colors, thereby creating a high-fidelity printing effect. High-fidelity outlets are a new software standard for FM technology. It is a pure software approach. High-fidelity color using FM network, more than four-color color separation technology, in the color reproduction range, print density, clarity and level compared with the four-color screening technology has a significant development.