It has been more than two thousand years since the invention of paper, and this material has become an important printing material in printing production.

There are many kinds of printing paper, mainly coated paper, offset paper, newsprint, special paper, bar code paper and so on. Among them, newsprint is also called white newspaper, mainly used in newspapers and books printing production. Here, we have a understanding of this paper material, as follows:

Newsprint is mainly made of natural mechanical wood pulp, unbleached or semi-bleached sulfite wood pulp as an auxiliary copy, which can be divided into A, B, C, D four grades (grade A, grade B can be applied to high-speed rotary offset press), of which grade A mechanical wood pulp accounts for about 70% ~ 80%, chemical wood pulp accounts for about 20% ~ 30%, and grade D mechanical wood pulp accounts for about 85% ~ 90%. Chemical wood pulp accounts for about 10% ~ 15%. Due to the mechanical wood pulp in the short fiber more, play the role of filling fiber interwoven void, so the amount of filling newsprint is less, generally not more than 6%. Newsprint is not sizing, but a small amount of alum is added to coniferous wood pulp because it contains more resin, so that it becomes aluminum soap and does not bind to the press roll and dryer of paper machine. Of course, this also has a certain impact on the water resistance of paper.

Newsprint mainly has web paper and plate paper two forms of packaging, web paper mainly width of 1575mm, 1562mm, 787mm, 781mm and other common specifications, length to web diameter to control, generally in the range of 800 ~ 900mm, paper core diameter of 75 ~ 85mm. Flat paper mainly has the format size of 787mm×1092mm, 781mm×1092mm, 850mm×1168mm, 880mm×1230mm and other common specifications, the size deviation is not more than ±3mm, the skew is not more than 3mm.

Newsprint paper loose light, good elasticity, good ink absorption performance, which ensures that the ink can be better fixed on the paper, and after calender smooth on both sides, no fuzz, so that the two sides of the impression is more clear and full. At the same time, newsprint in the printing process is also prone to problems and failures such as paper powder, wool, misprint, folding, paper fracture, so the storage and use of paper is very important.

1. When the paper comes into the factory, acceptance and testing should be carried out according to the regulations, especially for the quantitative, smoothness and crack length of the paper to meet the standard indicators, the appearance of paper disease to meet the requirements of the standard, which is related to the quality management of the paper and the control of printing cost.

2. Pay attention to the evenness of the paper and storage conditions. Newsprint should have better uniformity of fiber tissue, consistency of paper thickness and uniformity of water content, so as to prevent printing wrinkles, broken paper and inaccurate overprinting in printing. In addition, in transportation and storage, must pay attention to not be exposed to rain and sunlight, as far as possible to make the water content of the paper and the corresponding temperature and humidity conditions are basically consistent.

3 in the selection of printing ink, not only to choose permeable drying ink, but also must be selected according to the requirements of printing speed to adapt to the plastic viscosity and yield value of the range of ink. This can not only ensure the normal transfer of ink, good representation of text, but also prevent printing powder, hair and other problems.

4 must be based on the adaptability of the paper grade reasonable choice, must not be C, D grade paper for offset printing, otherwise the consequences will be difficult to control.

In short, to master all aspects of newsprint knowledge, standardized use of paper, improve the quality of printing has an important role. However, with the development of the Internet and other new media, newspapers and other traditional media have been greatly impacted, which has also caused a huge impact on the newsprint industry, making the whole market has been in a state of malaise.

Thus, it can be seen that how to revive the newsprint market under the new market conditions has become a problem that we need to think about. More advertising material price please continue to pay attention to advertising network.