Newsprint

Commonly known as white newspaper, it is characterized by being soft and porous, with a certain structural strength and good absorbency. It can make the ink penetrate and fix in a short time, and it will not be folded when folded. Sticky dirt, used for printing newspapers, periodicals and general books on high-speed rotary machines. The basis weight of newsprint is 51 grams per square meter, and the width of roll newsprint is 1572 mm, 1562 mm, 787 mm, and 781 mm; the format size of lithographic paper is 787 mm w1092 mm. Newsprint is adaptable to printing and opaque, but has low whiteness and different surface smoothness. A coarser mesh should be used when printing pictures. It will easily turn yellow and brittle after sunlight and is not suitable for long-term storage.

Crateboard

Also known as hemp cardboard, it is a relatively sturdy cardboard used in cartons. It is widely used for shipping books, department stores, radios, televisions, machine parts and food, etc. Basis basis is 200 g/m2, 310 g/m2, 420 g/m2 and 530 g/m2. Smooth surface and good mechanical strength.

Coated paper

Also known as coated paper, it is coated with a layer of white paint made of calcium carbonate or white clay and an adhesive on the base paper. It is dried and pressed High-grade printing paper made of light. Due to its delicate whiteness, high smoothness and gloss, and moderate oil absorption, it is suitable for copper plate printing or offset printing, printing color or monochrome pictorials, pictures, calendars, maps and books, and is also used for packaging and printing. It is divided into two types: single-sided coating and double-sided coating. The two types are divided into special numbers, No. 1, No. 2, and No. 3, with a quantitative range of 80 g/m2 to 250 g/m2. Coated paper requires high coating strength, no powder loss, and can be suitable for fine mesh printing of 60 lines/cm or more.

Offset paper

Oldly known as "Dowling paper", it is a paper for books and periodicals used in offset printing machines. Suitable for printing single-color or multi-color book covers, text, inserts, pictorials, maps, posters, color trademarks and various packaging materials. Offset printing paper is divided into special size, No. 1 and No. 2, with basis weight from 70 g/m2 to 150 g/m2. Pulp has high strength and printability. Offset printing is a relatively high-end printing paper for books and periodicals. It has high requirements on contrast, stretch rate and surface strength. The acidity and alkalinity should also be close to neutral or weakly alkaline so as not to affect the paper used for printing. The basis weight is 40 g/square. m to 80 g/m2. In recent years, we have successfully trial-produced low-quantity offset printing newsprint and offset printing book and periodical paper for use in offset printing paper and books and periodicals.

Letterpress paper

A kind of paper suitable for letterpress printing machines to print the text of various books, cultural and sports supplies and magazines. The basis weight is 52 g/m2 and 60 g/m2, available in roll paper and flat paper, with a smoothness of 30 meters and an opacity of not less than 88%. Letterpress printing paper is widely used for books and periodicals. It is slightly smoother than newsprint and has a longer shelf life. However, it is prone to lint and powder loss and is not suitable for printing books and periodicals using offset printing. This kind of paper bleeds easily when writing on it.

Straw cardboard

Also known as yellow cardboard or horse manure paper, it is a yellow packaging cardboard. It is mainly used for the packaging of goods, the cover lining of paper boxes and book boxes. Basis basis is 200 g/m2 to 860 g/m2. The commonly used ones are No. 8 420 grams, No. 10 530 grams, and No. 12 640 grams. Strawboard requires tight and solid quality, smooth paper surface, and certain mechanical strength and toughness.

White cardboard

Also known as manila paper, it is a white, relatively high-end packaging cardboard. It is used to print children's educational pictures and trademarks for stationery, cosmetics, and medicines. Basis basis is 200g/m2 to 400g/m2. The thickness is consistent, lint-free, powder-free, tough, and not easy to break when folded.

Binding cardboard

The important materials for book box packaging include white cardboard, yellow cardboard, etc., which are mainly used to make hardcover book cases and envelopes. The hardcover book case with cardboard as the skeleton has the advantages of being strong, beautiful and conducive to long-term storage.

Calcium paper

It is very similar to paper in appearance, can withstand water immersion, is not hygroscopic, is not easy to burn, has high burst resistance and tear resistance, and has low production cost. . It is strongly kneaded and rolled at 160 degrees. Its thickness is similar to that of cardboard. It can also be made into thicker cardboard. It has a certain ability to penetrate and absorb ink and can print clear pictures and text.

It can be used to print book cards, securities, labels and color prints, and can also be used to make corrugated cardboard boxes for shipping food and goods that need to be moisture-proof and oil-resistant.

Kraft paper

It is a tough and water-resistant packaging paper with a brown color and a wide range of uses. It is often used to make paper bags, envelopes, record sleeves, files and sandpaper. The basis weight range is from 40 g/m2 to 120 g/m2. There are roll paper and flat paper, single-sided light, double-sided light and striped paper. The main quality requirements are that it is flexible and strong, has high burst resistance, and can withstand large tensile forces and pressures without breaking.

Cellophane

Also known as transparent paper, it is a high-grade packaging and decorative paper that is as transparent as glass. It is used to wrap grains, fruits, food, shirts, cigarettes, cosmetics and other commodities. The basis weight is 30 g/m2. In addition to being transparent and colorless, there are many colors such as golden, pink, emerald green and so on. Cellophane is impermeable to air, oil and water, soft and strong, colorless, transparent and shiny. It can be moisture-proof and rust-proof after sealing, but it will crack if there is a slight crack. Because of its greater longitudinal strength, it can be made into paper ropes. Waste cellophane cannot be recycled.