The commonly used paper for printing can be classified into industrial papers, packaging papers, household papers, and cultural papers according to different uses. The cultural paper includes writing paper, art and painting paper, and printing paper. . In the printing paper, it is divided into newsprint, letterpress printing paper, offset printing coating paper, dictionary paper, map and sea drawing, gravure printing paper, painting newspaper, weekly newspaper, whiteboard paper, writing paper, etc. according to the performance and characteristics of the paper. . In addition, some high-grade prints are also widely used in art-drawing papers.
Newsprint: Newsprint is mainly used for the printing of newspapers and some letterpress publications. It is soft and elastic, has strong ink-absorption capacity, and has certain mechanical strength. It can be adapted to various high-speed web presses. This kind of paper uses wood paddles as raw materials for manufacturing, contains more lignin and impurities, and is prone to yellowing, brittleness, and poor water resistance, so it is not suitable for long-term preservation.
Letterpress Printing Paper: This is a special paper used for letterpress printing. The properties of paper are similar to that of newsprint paper. Water resistance, color purity, paper surface smoothness are slightly better than newsprint paper, ink absorption is more uniform, but strong ink capacity is better than newsprint paper. To be bad.
Offset printing paper: Offset printing paper is a kind of paper used for offset (flat) printing, and it is divided into single-sided offset paper and offset-type offset paper. Single-sided offset paper is mainly used to print posters, packaging boxes, etc. Double-sided offset paper is mainly used for printing pictures, pictures, etc. Offset paper is compact in texture, less in flexibility, and strong in water resistance, and can effectively prevent the paper from being deformed, misplaced, napped, or removed from powder during multicolor overprinting. Can give the print better color purity.
Offset coated paper: also known as coated paper, is a kind of high-grade paper coated with a layer of inorganic coating on the surface of paper and then super-calendered. The surface of the paper is smooth and flat, and the color purity is high. Delicate and smooth network points can better reproduce the layered feeling of the manuscript, and are widely used in art pictures, albums, and commercial leaflets.
Gravure Printing Paper: Rotogravure printing paper is white and firm, with good smoothness and water resistance. It is mainly used for the printing of banknotes, stamps and other high quality and difficult to imitation prints.
Whiteboard paper: Whiteboard paper is a kind of paper with relatively uniform fibrous structure, surface layer with filler and rubber compound and coated with a layer of paint, and is produced by multi-roller calendering. The paper surface has high purity and relatively uniform color quality. The ink-absorption property has a good folding-resistance. It is mainly used for the packaging of goods, the lining of products, and the picture-charts.
Synthetic paper: Synthetic paper is made of chemical raw materials such as olefins and then added with some additives. It has a soft texture, strong tensile strength, high water resistance, light resistance to heat and cold, and can resist the corrosion of chemical substances without environmental pollution. Breathable, widely used in advanced art, maps, pictures, high-grade books and other printing.