Comparative selection of screening methods for Shiny Golden Inner Frame prepress processing

Comparative selection of screening methods for Shiny Golden Inner Frame prepress processing

From the initial photographic screening to the present laser electronic screening, rational mesh, irrational mesh and composite mesh have been formed.

1. Amplitude Modulation Screening (SAM)

The amplitude-modulation technique is based on the central element of the grid. The distance between the center of two adjacent dots is constant, the arrangement of dots follows a certain rule, and the shape of dots is artificially designed. The size of the pixel value controls the size of the dot area. It changes the size of the dot to express the depth and shallowness of the image layer when the number of dot is unchanged.

The technology of computer AM screening is basically the same as that of electronic color separators. The fine adjustment of dot shape and the algorithm of dot shape adjustment is a difficult point in amplitude modulation screening technology.

In short, due to the regular distribution of dots, it is easy to produce interference fringes when amplitude modulation screening is used in multi-color overprinting, and the screen Angle of the color separation plate must be strictly controlled.

Second, Frequency modulation network (SFM)

Frequency-modulation screening is a technique in which a number of tiny dots act as individual pixel units. They are randomly distributed in a specific unit area, the area of which varies according to the calculation method.

Compared with amplitude modulation network, frequency modulation network has many advantages. In the fields of offset printing, flexographic printing, news printing, etc., it has excellent prospects for development. However, due to the small inking point of FM screen, the adaptability of paper, ink and equipment is high, and there are problems in the promotion and application.

Third, high-fidelity color screening technology

In order to further improve the level of printing technology, improve the resolution of printing equipment, give full play to the advantages of computer plate making technology, and fundamentally improve the reproduction quality of printed matter. Then came the high fidelity true color screening technology. High fidelity dot is a new standard set for FM dot technology, which is a pure software method. High fidelity true color using frequency modulation dot, the use of more than four color separation technology, in color reproduction range, printing density, clarity and level compared with the four-color screen technology has a significant improvement. High fidelity screening technology is the mainstream of future screening technology.