Screening methods From the initial photographic screening to the current laser electronic screening, there have been a number of screening technologies such as rational meshes, irrational meshes, and composite meshes.
I. AM screening (SAM)
AM screening technology is based on the center element of the grid. The distances between the centers of two neighboring nodes are not changed. The arrangement of the dots follows a certain rule. The shape of the dot is an artificially designed point type. The size of the pixel value controls the size of the dot area, and it expresses the depth and the lightness of the image layer by changing the dot size under the condition that the number of screen dots is constant.
The computer AM screening and the electronic color separation machine are basically the same. The fine adjustment of dot shape and dot shape adjustment algorithm is a difficult point in the AM screening technology.
In short, due to the regular distribution of dots, it is determined that the interference screening is easy to occur when AM screening is used in multi-color overprinting, and the separation screen angle must be strictly controlled.
Second, frequency modulation screening (SFM)
FM screening technology is the idea of ​​some of the particles as independent pixel units. They are randomly distributed in a specific unit area, and their area varies according to the calculation method.
Compared with AM screening, FM screening has many advantages. In the field of offset printing, flexographic printing, news printing, etc., there is an excellent development prospect. However, due to the small number of ink-jet screens for FM screens, the requirements for paper, ink, and equipment are high, and there are problems in promotion and application.
Third, high-fidelity true color screen 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-based platemaking technology, and fundamentally improve the reproduction quality of printed matter. As a result, high-fidelity, true-color screening technology has been produced. High-fidelity network is a new standard set for FM network technology and is a software-only method. High-fidelity true color adopts frequency-measuring dots and uses color separation technology of more than four colors. Compared with four-color screening technology, there are significant improvements in color reproduction range, printing density, clarity and gradation. High-fidelity screening technology is the mainstream of future screening technologies.
Reprinted from: Print Forum
Wine box, usually refers to the box that holds bottled wine. Materials are: Wooden Box, leather box, metal box and paper box. Different shapes for shock and decoration.
Wine box, also known as red wine box, is usually called wine packaging box or red wine packaging box. As the name implies, it is the outer packaging of wine (red wine), which has the function of protecting red wine for convenient transportation and storage, and at the same time, it is beneficial to wine ( red wine).
1. Wine wooden box (red wine wooden box)
Usually include log wine boxes (multi-purpose materials include pine, paulownia, etc.), imitation mahogany wine boxes (multi-purpose materials include MDF, etc.), and the shapes are diverse and are mostly used for medium and high-end wine packaging.
2. Wine leather box (red wine leather box)
Most of the wine leather boxes (red wine leather boxes) are made of PU, PVC and other artificial leather. The leather packaging is more suitable for the characteristics of wine, and can be divided into single-pack, double-pack, four-pack and six-pack in terms of capacity.
3. Metal wine box (metal wine box)
There are few metal wine boxes in the market and are not widely used. Most of them are made of aluminum alloy, iron, and other alloys.
4. Wine carton (red wine carton)
Wine cartons are mostly made of cardboard, corrugated paper, special paper, etc. Since the raw materials are paper, which is convenient for secondary recycling, the shape can be diversified, and other processes are convenient, so wine cartons are widely used in wine packaging.
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