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Roll gray-backed cardboard is a kind of white linerboard with 2-3 layers of structure. It is a relatively high packaging cardboard. It is mainly used for sales packaging and is made into various types of cartons after color printing. The box plays the role of protecting products, decorating and promoting products, and may also be used to produce clothing hangtags, linings and the base plate of blister packaging plants. Rolled gray-backed white cardboard is also known as San Francisco paper. Rolled gray-backed white cardboard is used to print educational photos of children and logos of daily necessities, skin care products, and medicines. The basis weight is 200g/m2 to 400g/m2. The thickness is consistent, it does not pill or powder, it is malleable, and it is not easy to break when it expands and contracts.

Characteristics and uses of offset paper: Offset paper is a type of paper that we use daily, such as printing paper, exercise book pages, etc. Generally used are 60g/80g/100g, etc. Also known as Dowling paper, English is: wood-free printed paper. Offset paper refers to printing paper, also called coated paper. It refers to paper in which plastic particles are coated on both sides of the paper during the papermaking process to improve its physical properties. The quantitative analysis of some offset papers is between 60 grams and 120 grams, and there are also high-weight offset papers of 150 grams. Some offset paper on the market costs 7,000 to 9,000 yuan per ton.

Because news paper is different from SBS cardboard and some printing papers, it is not coated, is bulkier than cardboard after bleaching, has a lot of porosity on the surface, and has stronger wettability, etc., which is important in the use of ink. Both the application and coating aspects need to be comprehensively considered. For example, based on the analysis of the characteristics of news paper printing paper, some flexo printing is good, but it is not suitable to use a printing press for full-page on-site news paper printing. Because the surface of news paper is rough, the material is soft, and it has strong ink absorption, the color of the printed matter is dull, and printing will also cause the ink to pull off paper fibers (also called paper lint).

Newsprint manufacturers are preparing for transformation. Due to the unstable supply of production raw materials, most domestic newsprint manufacturers are planning to switch production. In 2018, the China Press Association found during a survey that Shandong Jinyang Paper converted a newsprint machine into more profitable packaging paper after the 2018 Spring Festival. Shandong Shanxian Tianyuan Paper, which has been producing newsprint before, has not produced newsprint since 2018. As environmental protection policies become increasingly clear, the domestic newsprint market will usher in an inflection point around 2020. Only by taking precautions and planning ahead can various risks that may arise be resolved.

The paper of newsprint is soft, has good elasticity, and has good ink absorption performance, which ensures that the ink is fixed on the paper quickly; after the sheet is calendered, both sides are smooth and lint-free, so that the printed imprints on both sides are clearer and fuller; It has a certain mechanical strength; it has good opacity and is suitable for high-speed web printing. It can be used for bags, handbags, gifts, shoes, packaging, printing, etc.

Sulfur-free paper is used by circuit board manufacturers as a special backing paper for the PCB silvering process to prevent the chemical reaction between silver and sulfur in the air. Its function is to chemically precipitate silver and prevent the chemical reaction between silver and sulfur in the air, which may cause Yellow, sulfur-free, which can avoid defects caused by the reaction between sulfur and silver. Sulfur-free, chlorine-free, and sodium-free special paper is supplied in large quantities. The pH value is neutral, and relevant inspection reports can be provided. Usage: Mainly used in silver-plated product packaging. Such as circuit boards, circuit boards, hardware terminals, food protection products