Analysis of Commercial Advertisement Printing Process Technology (Chinese)

Color copy

The common feature of multi-color printing is to increase the color rendering range by increasing the base color. At present, a printed matter must be printed with at least 6 colors before it can find a place in the “high-grade print” field. A large number of spot colors are used in the company logo standard color, large-area background color, VI system main color, and small The text avoids the visual discomfort caused by the dispersion of the edge patterns produced by screen printing. With it, use 6 colors, 8 colors or even 10 color printing machines.

In recent years, due to the emergence and maturity of HI-FICOLOR technology, normal photo printing can also be extended from ordinary CMYK color separation mode to CMYKRGB 7 color separation mode for printing, and the original color gamut can be restored to a greater limit. .

Printing materials

The vast majority of high-grade printed matter in developed countries is mainly coated paper (coating paper and matt coated paper). The purpose is to obtain good printability to restore high quality image originals. Although the international call for the use of recycled paper is higher than a wave, but in this high-grade prints, it is still based on the use of plain paper made of pure wood pulp, its fiber length, has a good stiffness, and its white Degree, smoothness and cleanliness are very high.

In fact, we cannot simply think that such paper is not environmentally friendly. In Europe, the production of such paper must also follow the green policy and be certified by the Forest Stewardship Council (FSC). Internationally, this high-grade coated paper is best known in the Nordic countries, such as famous brands such as Anna, UPM, and Stora Enso.

These papers can hardly be distinguished from the ordinary grade papers by the human eye. However, technically, high-grade coated papers are more complex than ordinary coated paper production processes, and the uniformity and layering of paper coating can be improved. Embodies the printing uniformity and layering. The general high-grade coated paper will have two coating processes, and the top coated paper will be coated three times in production to ensure the high smoothness, high whiteness, good tear strength and low ink absorption of the coated paper. The amount and quick-drying make it have a high quality printing effect and the best printability.

The high smoothness keeps the refractive index at any angle of the surface of the paper consistent, and the color of the ink printed on the paper looks quite uniform and saturated. Therefore, once the printing on the machine, the performance and printability performance is very obvious, especially in the high quantitative (above 250g/m2) and low quantitative (105g/m2 below) paper is more prominent. Koenigbauer Printing Machinery (Shanghai) Co., Ltd.

In addition to this, senior office papers from the United Kingdom and Sweden are also widely used in official documents such as annual reports. For example, brands such as “Ganggu” are mainly made of stripes and slippery surfaces, and a few are used for frame binding.

Screening technology

Developed countries are based on mature high-end printing technology environments, such as the widespread adoption of CTP, and the commercial application of UV printing and waterless offset printing technologies. These prints generally adopt the traditional high-line number screening of screening and screening (300 lines/inch or more). , even up to 400 lines/inch. With this accuracy, it is difficult for the human eye to be able to distinguish between the conventional line of sight (about 10cm from the surface of the paper) with the conventional 175 lines/inch or 200 lines/inch screen lines. Distinguished visual disturbances such as outlets, network lines, rose spots, and moire.

Some prints use FM screening technology. After the emergence of this technology in the 1990s, it was not widely used due to the limitations of the technology and printed materials at that time. However, there are already a large number of high-precision prints that have begun to use this technology and can present details with a higher degree of detail. Since the distribution of dots is random, the traditional rosettes, moiré and other interferences of the traditional amplitude modulation screens interfere with the details. The phenomenon has been fundamentally solved, and it is even better in terms of gradient performance. (To be continued)