Printing paper specifications:
1. Flat paper specifications: 787×1092, 850×1168, 880×1230; there are also some special sizes of paper.
2. Web specifications: width 787, 1092, 1575;
3. Length about 6000~8000m.
Commonly used printing papers in China include coated paper, offset paper, trademark paper, kraft paper, corrugated paper, paper bag paper, cellophane, moisture-proof paper, white cardboard, etc. Offset printing requires printing paper to have a smoother surface, better printing performance, and the ability to withstand large changes in temperature and moisture without curling.
Extended information:
Types:
1. Paper bag paper
Paper bag paper is similar to kraft paper, mostly made of softwood sulfate pulp It is produced in China. It is also produced in China by mixing some bamboo pulp, cotton stalk pulp and rag pulp. Therefore, paper bag paper has high mechanical strength and is generally used to make packaging bags for cement, pesticides, fertilizers and other industrial products. In order to meet the requirements of filling, paper bag paper requires a certain degree of air permeability and large elongation.
2. Cellophane
Cellophane is a widely used lining paper and decorative packaging paper. Its transparency allows people to see the goods inside at a glance. After the surface is plastic-coated, it has properties such as moisture-proof, water-tight, air-tight, and heat-sealing, which plays a good role in protecting the goods. Compared with ordinary plastic films, it has the advantages of being non-static, dust-proof, and has good kink resistance. Cellophane comes in white, colored, etc.
3. White cardboard
It is a kind of flat paper with smooth surface and firm texture.
4. White cardboard
White cardboard is divided into double-sided white cardboard and single-sided white cardboard. Double-sided white cardboard is only used for high-end product packaging. Most general cartons use single-sided white cardboard. Cardboard, such as outer packaging boxes for cigarettes, cosmetics, medicines, food, stationery and other commodities.
5. Composite paper
Use adhesive to laminate paper, cardboard and other plastics, aluminum foil, cloth, etc. to obtain composite processed paper. Composite processed paper can not only improve the appearance performance and strength of paper and cardboard, but also improve the waterproof, moisture-proof, oil-resistant, air-tight and fragrance-preserving properties. It can also obtain heat sealing, light blocking, heat resistance, etc. The methods for producing composite paper include wet method, dry method, hot melt and extrusion compounding.
Baidu Encyclopedia-Printing Paper
Baidu Encyclopedia-Printing Paper