What are the uses, raw materials and types of paper?

1. Types of paper:\x0d\1. Packaging paper: \x0d\White board paper, white cardboard, kraft cardboard, kraft paper, corrugated box board, tea board paper, parchment and chicken paper, cigarette paper, silicone oil paper Paper cup (bag) base paper, coated paper, cellophane, oil-proof and moisture-proof paper, transparent paper, aluminum foil paper, trademark, label paper, fruit bag paper\x0d\2. Printing paper: \x0d\coated paper, newsprint, light-coated paper, light-weight paper, offset paper, writing paper Dictionary paper, book paper\x0d\3. Industrial paper: \x0d\ Release paper, carbon paper, insulating paper, filter paper, test paper, capacitor paper, plate paper, dust-free paper, impregnated paper, sandpaper, anti-rust paper\x0d\4. Office and cultural paper: \x0d\Tracing, drawing paper, other copy paper, art paper, carbon paper, fax paper, printing paper, copy paper, photo paper, rice paper, thermal paper, color inkjet paper\x0d\5. Household paper: \x0d\Toilet paper, facial tissue, napkin, diaper, sanitary napkin, wet wipes, other \x0d\6. Special paper: \x0d\ Decorative original paper, water-grained paper, leather-grained paper, gold and silver cardboard\x0d\\x0d\ 2. Characteristics of various papers: \x0d\1. Newsprint\x0d\ 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 stick when folded. It is 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. \x0d\2. Box cardboard \x0d\ 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. \x0d\3. Coated paper\x0d\ Also known as coated paper, it is a high-grade printing made by coating a layer of white paint made of calcium carbonate or white clay with an adhesive on the base paper, drying it and calendering it. Use paper. Because it is delicate and white, has high smoothness and gloss, and has 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. \x0d\4. Offset paper \x0d\ Formerly known as "Daolin paper", it is a paper for books and periodicals used by 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. \x0d\5. Letterpress paper \x0d\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. \x0d\\x0d\6. Straw cardboard \x0d\ 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. \x0d\7. White cardboard \x0d\ 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 200 g/m2 to 400 g/m2. The thickness is consistent, lint-free, powder-free, tough, and not easy to break when folded. \x0d\8. Binding cardboard \x0d\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. \x0d\9. Calcium paper \x0d\The appearance is very similar to paper. It is resistant to water immersion, does not absorb moisture, is not easy to burn, has high burst resistance and tear resistance, and has low production cost. It is made by strong kneading and calendering 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. \x0d\10. Kraft paper \x0d\ 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, etc. 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. \x0d\11. Cellophane \x0d\ 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 also 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. \x0d\12. Postal cover paper\x0d\\x0d\ is an extremely thin single-sided smooth writing paper with a basis weight of only 20 g/m2. It was originally mainly used for stamp backing paper and sealing paper for insured letters. . Now it is mostly used in cosmetics, fruit and food packaging and cigarette linings. After printing and waxing, it can be used as candy wrapping paper, or it can replace typing paper and copy paper to print documents, subpoenas or multi-page carbon paper. The quality requirements are thin and strong, with good transparency, high tension and low air permeability. \x0d\13. Paper for Chinese calligraphy and painting \x0d\ It is paper used for writing and painting with brushes, including Yuan calligraphy paper, rice paper, rough edge paper, etc. Yuan Shu paper is made from plant fibers such as bamboo, bark, rags, old hemp and straw. It is soaked, steamed, naturally bleached and ground to make pulp. It is then manually copied into paper on bamboo curtains and pressed dry. It is then pasted on a fire wall and dried. The resulting paper is white (or slightly yellow) in color, uniform and soft, easy to absorb ink, and durable. Rice paper is a paper for calligraphy and painting made with sandalwood bark and a small amount of straw pulp as raw materials. Raw rice paper is suitable for freehand painting and calligraphy. The cooked rice paper processed from it is suitable for fine brushwork. The color is white and flexible, durable and difficult to change. Insect-eaten. It is famous for its origin in Xuancheng area of ??Anhui Province. Raw edge paper is a writing paper made of young bamboo. It is light yellow in color, while historical paper is white in color. Both are made of bamboo curtains and are used for printing ancient books, inscriptions, letterheads, fans and other products. \x0d\14. Glossy paper \x0d\ is a single-sided glossy paper used for writing, office work and promotional slogans. It can also be used for pasting paper boxes, packaging goods, printing calendars, letterheads and invoices, etc. It has a wide range of uses and is a commonly used tissue paper. It used to be called office paper or snow lotus paper. There are three types: special number, No. 1 and No. 2, with quantitative quantities ranging from 18 g/m2 to 40 g/m2. Quality requirements include uniform thickness, smooth paper surface, light sizing for easy writing, and certain water resistance. Colored glossy paper is also called slogan paper and is mainly used for writing slogans! \x0d\15. Typing paper \x0d\ is a thin paper used for typing and copying. It is also used to print documents, tickets or letterheads. It is divided into three grades: Special No., No. 1 and No. 2, with a quantitative range of 24 g/m2 to 30 g/m2, and the commonly used one is 28 g/m2.

It requires that the thickness of the paper does not exceed 0.05 mm, the thickness is consistent, it can be typed and copied on multiple pages at one time, the paper is strong and flat, and does not bleed when writing. Colored typing paper is used for printing multi-part summons or tickets. \x0d\16. Writing paper\x0d\ is a kind of cultural paper that is widely consumed. It is suitable for forms, exercise sheets, account sheets, record books, etc., and is used for writing. It is divided into special numbers, No. 1, No. 2, There are five grades of No. 3 and No. 4, with a basis weight of 45 g/m2 to 80 g/m2. \x0d\Quality requirements: white color, smooth on both sides, tight texture, and no water smearing when writing. \x0d\17. Gravure paper \x0d\ Paper used for printing various color prints, periodicals, comics, picture albums, stamps and securities. Its specifications and sizes are basically the same as newsprint, letterpress paper and offset paper, and are also divided into roll paper and flat paper. Gravure paper printing requires high smoothness and shrinkage. The paper should have high whiteness and good smoothness and softness. \x0d\18. Cast coated paper \x0d\ Also known as glass powder paper, it is a high-grade coated printing paper with a particularly smooth surface. It is coated with a thick coating amount (20 to 39 grams per side) on the base paper twice or once. When the paint is in a wet state, the coated surface is heated and dried close to a highly polished chrome-plated drying cylinder. It can be obtained at a speed of about 100 meters or lower, the gloss is about 85, and no calendering is required. The coated paper is embossed with a pattern roller to make cloth paper or chicken skin paper. Cast-coated paper is mainly used to print covers, inserts and high-end cartons, while textured paper and chicken skin paper are mostly used to print wall calendars and business cards. \x0d\19. Matt pink paper\x0d\The official name is matte coated paper. When observed under sunlight, it is less reflective than coated paper\x0d\3. Paper manufacturing process\x0d\1: Made by cutting down trees Material 2: Cut to appropriate length 3: Peel off the bark 4: Cut into pieces 5: Cut into thin slices\x0d\6: Concentrate the slices and transport them to the paper mill 7: Make pulp with liquid and steam 8: Apply medicine Rinse with water\x0d\9: Remove impurities 10: Bleaching pulp 11: Add potion to pulp 12: Drain water with a net\x0d\13: Place on felt to absorb water 14: Dry water at high temperature 15: Calender Calendering by machine\x0d\16: Made into paper rolls\x0d\ In China, the invention of paper is attributed to Cai Lun, an eunuch of the Han Dynasty (about 105 AD; Chinese version editor's note: Historical research in recent years shows that at this time Still need to push forward). Paper at that time was made from bamboo roots, rags, hemp, etc. The manufacturing process was to pound these materials, boil them, filter them, and spread the residue out to dry. The manufacture and use of paper gradually spread to the northwest along with the commercial activities of the Silk Road. In 793 AD, a paper mill was built in Baghdad, Persia. From here, papermaking spread to the Arab countries, first to Damascus, then to Egypt and Morocco, and finally to Excellovia in Spain. In 1150 AD, the Moors built Europe's first paper mill. Later, paper mills were established in Horantes, France in 1189, in Vabreano, Italy in 1260, and in Germany in 1389. After that, there was a London businessman named John Tent in England who started making paper in 1498 during the reign of King Henry II. In the 19th century, paper made from rags and plants was basically replaced by paper made from plant pulp. \x0d\Different from parchment, paper is relatively cheap and can be produced in large quantities and quickly, which is very important for book printing. The first printed book was the Gutenberg Bible published in Germany in 1457 in memory of Johannes Gutenberg. This goldsmith from Mainz invented the first movable type printing plate. The advent of printed books accelerated the creation of professional writers.