The types, introduction, and uses of the most valuable paper

This doesn’t seem to exist, I can’t find it! !

The following is the most expensive paper in the world:

"Holding the bamboo pen sent by the Golden Deer, bathing in the inspiration brought by the blue bird, facing the rough bark , use the budding wisdom to observe the curves of the stars, observe the traces of turtles, birds, and learn from all the beauties to combine them into the universe. ”

This is Ding Bashiluo, the founder of the Naxi Dongba. Records of word creation. Among them, the "rough bark" is the Dongba paper on which more than 20,000 Dongba scriptures are written. Although time flies, the Dongba pictographs written on Dongba paper for hundreds of years are still as bright as new. It can be said that Dongba paper is one of the oldest papers that continues to be used in China today. A foreign collector once bought a piece of Dongba paper in Shenzhen for US$20,000, which attracted widespread attention.

The raw material of Dongba paper is taken from the bark of the paper mulberry tree, that is, the Pu tree. "History of Chinese Papermaking Technology" says: "The Beijing Library, the Museum of Chinese History, etc. all have paper manuscripts made by the Naxi people in the Ming and Qingming Dynasties. This kind of paper is thick and tough, without curtain lines, and the raw material is bark fiber... ...After being matte, you can write on both sides." This papermaking method is inherited from the Dongba family and is currently only spread among some Dongba and their descendants in Daju Township, Lijiang County and Sanba Naxi Village in Zhongdian County.

Dongba paper is a paper used exclusively for Dongba in ancient times and used to write Dongba characters. The craftsmanship is purely manual workshop, and only the Dongba characters produced in this workshop are original and full of charm. Dongba paper was invented and homemade by the ancestors of Teacher He Shengwen 300 years ago. After it was lost for more than 10 years, Teacher He resumed the production of Dongba paper, and developed calligraphy and painting paper, mounting, and high-end business cards on the basis of tradition. , embossed bookmarks, embossed grass-sealed movable surface Tibetan scripture paper and other series. Its exquisite craftsmanship, texture and insect-proof characteristics are well received by users at home and abroad.

Xuan paper is a kind of precious paper well-known at home and abroad. Because this kind of paper is produced near Xuancheng, Anhui Province, it is called "rice paper". The production of rice paper has a history of more than 1,500 years. This kind of paper is white, fine, uniform and soft, and can best express the characteristics of Chinese calligraphy and painting. Because rice paper is not easily broken or discolored, many ancient Chinese calligraphy and paintings are still intact after hundreds or thousands of years.

..Types of rice paper

It is produced in the hilly and mountainous areas of Jing County, Anhui Province, China (Jing County belonged to Xuanzhou Prefecture in ancient times and is now under the jurisdiction of Xuanzhou City, so it is called rice paper (XuanPaper).

Types of rice paper

The quality of rice paper is pure white and fine, soft and uniform, cotton is tough and strong, smooth but not slippery, transparent and glossy, and its color remains unchanged. It is not rotten after being stored for a long time, is not damaged at any time, is resistant to aging, and is insect-proof and moth-proof, so it is known as "thousand-year-old paper".

First, according to the proportion of ingredients, it can be divided into cotton material and net material. There are three categories: leather and special pure leather.

Cotton material: about 30% of green sandalwood leather; about 70% of straw.

Pure leather: about 60% of green sandalwood leather; about 60% of straw.

Special pure leather: more than 80% of green sandalwood leather; less than 20% of straw.

Secondly, according to the number of sheets of paper, it can be divided into single sheets. , folder Xuan, etc.

Single Xuan: single layer of rice paper, relatively thin

Cover Xuan: combine 2 or more sheets of original bleached rice paper into one sheet. It is called a double folder. The combination of 2 pieces is called a triple folder.

Thirdly, it can be divided into four feet according to the size of each paper. Xuan, Wuchixuan, Bachixuan, Zhangerxuan, Zhangliuxuan, Zhahuaxuan, etc. The larger the size, the more difficult it is to make. They are mostly used for government announcements or the creation of large-scale calligraphy and paintings.

Fourth, according to processing. The degree of processing can be divided into raw Xuan and cooked Xuan.

Raw Xuan: Raw paper is taken out directly from the paper slot and dried without any processing. Raw Xuan has the characteristics of ink bleeding and water absorption. , very suitable for creating freehand paintings and cursive calligraphy.

Raw Xuan: Brush a layer of alum water and dragging glue on the raw Xuan, which is called Ripe Xuan. It has ink penetration and water absorption properties. It is not as good as raw xuan.

Fifth, cooked xuan can be divided into many types after different processing techniques.

Hupi Xuan: Also known as "Tiger Skin Jian", formerly known as "Golden Li Jian", it is rice paper processed and dyed into yellow stripes.

Cold gold paper: Decorate gold and silver flakes or gold and silver powder on paper.

Mica paper: Sprinkle mica powder on the paper.

Cicada Wing Note: Very thin rice paper note.

Jade Ban Xuan: It is made of two or more layers of rice paper supported by starch, and the paper is thicker.

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Paper is one of the four ancient Chinese One of the great inventions. The paper used in the art of calligraphy and painting is the best produced in Xuancheng, Anhui, so it is called "rice paper". Due to different processing methods, it can be divided into raw and cooked. Raw rice paper has strong water absorption and is mostly used for freehand paintings; cooked rice paper has weak water absorption and is mostly used for fine brushwork paintings.

Xuan paper---originates from the hilly and mountainous areas of Jing County, Anhui Province, China (Jing County belonged to Xuanzhou Prefecture in ancient times and is now under the jurisdiction of Xuanzhou City, so it is called "Xuan Paper"). Rice paper - the quality is pure white and fine, soft and even, cotton is tough and strong, smooth but not slippery, transparent and glossy, the color does not change, and it is not rotten after being stored for a long time, is not damaged by hundreds of folds, is resistant to aging, and is insect-proof and moth-proof, so it has It is known as "thousand-year longevity paper".

There are many types of rice paper. According to the material selection, it can be divided into three categories: cotton, pure leather, and special pure; according to the thickness, it can be divided into: single rice paper, sandwich rice paper, two-layer sandwich, three-layer sandwich, etc. ; According to the paper texture, it can be divided into: single silk path, double silk path, rib pattern, and turtle pattern.

Xuan paper is divided into raw Xuan, cooked Xuan and half-cooked Xuan. Ripe rice paper is processed with alum water. Ink is not easy to penetrate and will not melt when exposed to water. However, the effect is different from other papers. It can be used for precise and detailed drawings and can be repeatedly rendered and colored. It is suitable for painting with green and heavy colors. Fine brushwork landscape. Raw rice paper has not been processed with alum water. It is characterized by strong water absorption and water permeability. It melts when exposed to water. It is easy to produce rich ink rhyme changes and can achieve the artistic effect of water halo ink stamps and thickening. It is mostly used for Freehand landscape painting. Familiar Xuan painting is easy to master, but it is also prone to slipperiness and rigidity; raw Xuan painting, although rich in ink, penetrates quickly and is difficult to master. Therefore, it is generally preferred to use half-cooked rice paper when painting landscapes. Half-cooked rice paper slowly melts when exposed to water. It has changes in ink rhyme but is not overly penetrating. It is easy to master the process of chaffing, rubbing, dotting and dyeing, and can express rich brushwork and ink interest.

The literati, calligraphers, and painters of the past dynasties all treasured and loved to use rice paper. When painting with inscriptions on rice paper, the ink rhyme is clear, the layers are clear, the character is strong, and the momentum is overflowing. It is thick but not muddy, light but not gray. The words and paintings appear on the paper, with high spirits and bright eyes. Produce a special and full artistic effect.

Types of rice paper

The main raw materials for papermaking are mostly plant fibers, mainly bamboo and wood. The fibers of wood are flexible and can be made into paper with strong ink absorption; The fiber is brittle and hard, and the paper produced has weak ink absorption, so it is divided into two categories:

Weak ink absorption paper: mostly made of bamboo fiber, the paper surface is smooth and the ink It floats on the surface and is not easy to open slowly, so the color is bright. Mainly paper types, such as Chengxintang paper, clay-gold paper, and modern foreign paper also belong to this category.

Chengxintang paper: a famous paper used by Empress Li of the Southern Tang Dynasty, and is as famous as Tinggui ink. It is smooth and compact, and is known as "slippery as spring, as dense as ice, and as dense as a seal". It is the top grade of weak blotting paper, the worse one is called jade water paper, and the second worst one is called cold gold paper. "Light and crisp" is its characteristic.

Shu Jian: It is said that Cai Lun’s ancient papermaking method was passed down from Western Shu, and the Shu Jian produced has been quite famous since the Tang Dynasty, such as Xue Tao Jian, Xie Gong Jian, etc. It is said that the water here is of pure quality, so the paper is of excellent quality. "Xie Gong Jian" is named after the type of Jian written by the teacher. Because it has ten colors, it is also called Ten Color Jian. "Xue Tao Jian" is named after Tao. However, although this kind of colored paper is made according to ancient methods, the dyeing is easy to fade and cannot be passed down for a long time. It is just for entertainment.

Tibetan scripture paper: Tibetan scripture paper is used in Buddhist temples to write or print Buddhist scriptures. It is also called golden millet paper and comes in two types: yellow and white.

The lacquered paper and wax paper commonly used by people in the Ming and Qing Dynasties are rarely seen today. Although the cold-light paper is the lowest in appearance, it is also rare. Today, Toriko paper made in Japan is generally used, but it is expensive, does not last long, and is not practical.

Strong ink-absorbing paper: mostly made of wood fiber, with strong ink-absorbing properties and a rough surface. Once the ink falls off the paper, it easily spreads. When writing, it is often pulped or coated with wax, and the luster is not as good as paper. The paper is bright and subtle, mainly rice paper. Although it appeared later, it has now replaced writing paper as the most valuable writing paper.

Xuan paper and imitation Xuan paper: The most precious writing paper today is jade board Xuan paper. The jade board is made of mulberry, short knotted wood, rice straw and sandalwood bark soaked in lime. It has the strongest ink absorption and the best texture. Xuan paper is named after Xuancheng, Anhui Province. However, Xuancheng itself does not produce paper. Instead, the surrounding paper-producing areas all use Xuan as a distribution center.

Let’s continue talking about the precious jade plate. This kind of paper is not suitable for everyone, because it absorbs ink very much, so people who use the pen too slowly will have a hard time using it: as long as the pen stops for a moment, the ink will seep out and form a big ink ball. ! But there are also people who take advantage of its characteristics to write unique characters, such as Bao Shichen's light-ink calligraphy and Qi Baishi's large-scale freehand paintings.

Because rice paper is too absorbent and difficult to write on, some people have improved it: some are made by calendering, adding vitriol, or adding pulp. The improved rice paper has slightly reduced ink absorbency and is easier to write on.

Raw-edged paper, Yuan Shu paper and cotton paper: Rice paper is expensive, and rough-edged paper is generally used when practicing calligraphy. This kind of paper was originally used for printing books, but because of its good quality, some people bought books and cut them to practice calligraphy, so it was called "raw edge paper". The raw material used for this paper is mainly bamboo. It is tooth-yellow in color and has a fine texture. It is very different from the machine-made raw edge paper used in the copybooks of primary and middle school students today. Yuan Shu paper is similar to rough-edged paper, but it is unknown today. The tissue paper made in this province can also be regarded as this type. It has gradually improved texture, is quite tough, and is not very expensive. It can be used for calligraphy practice.

There are many types of rice paper, with different names and different classification standards and methods.

2.. The use and selection of rice paper

Special clean leather: the best of rice paper, with a lifespan of thousands of years, good calligraphy and painting, and suitable for making albums;

Pure leather sheet: suitable for writing and painting, with a softer feel;

Cotton sheet: suitable for general painting and calligraphy;

Continuous: thin paper, often used for support Painting core;

Cotton Xuan: often used in calligraphy, two or three layers of Xuan are used for mounting, album pages;

Turtle pattern Xuan, rib Xuan: making rubbings;

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Jade Ban Xuan: generally used for calligraphy.

Fun Xuan (cooked Xuan): There are ice and snow Xuan, mica Jian, cicada wing Xuan, etc., which are used for fine brushwork and young regular script, whichever does not bleed.

1. Coated paper - coated paper that is coated with paint on the surface of the original paper and then calendered. Its grades can be divided into the following categories:

(1) Super Coated paper (A0): The highest-grade coated paper that has been coated two to three times. The total coating amount per side is more than 25g/m2, the glossiness is more than 80 degrees, the paper surface is extremely fine and smooth, and the printing is very clear and bright. Suitable for high-end picture albums, high unit price product catalogs, important documents and other printed matter with extremely high quality requirements.

(2) Premium coated paper (A1): According to the general classification standards of the Japanese paper industry, high-grade coated paper with a coating amount of about 20g/m2 on each side has a smooth and delicate paper surface and excellent printability. For example, our company produces high-white special-grade coated paper and crystal diamond special-grade coated paper.

(3) Coated paper (A2): It is divided into single-sided and double-sided coated paper. According to the Japanese paper industry classification standard, the coating amount on each side is about 10g/m2 or more, which is the current cultural standard. One of the most commonly used paper types in publishing, advertising design, printing and binding, and industrial and commercial circles. Such as the single-sided and double-sided coated paper produced by our company.

(4) Lightweight coated paper (A3): According to the Japanese paper industry classification standard, the coating amount on each side is about 7-10g/m2, such as the light coated paper produced by our company and beige light coated paper.

(5) Blunt coated paper: Coated paper with powder coated and calendered surface, with a glossiness of about 20 to 40, and high printing gloss, such as the special snow-coated paper produced by our company.

(6) Snow-coated coated paper: Powder-coated calendered coated paper with a glossiness below 20 degrees. The paper is soft, non-reflective and does not damage eyesight.

(7) Micro-coated paper: It is coated with pigments and calendered to improve the uniformity and smoothness of the paper surface, and improve the ink holding capacity of the paper.

(8) Marking paper: printing paper that is coated and processed directly on the paper machine. It is suitable for color, color registration and monochrome printing, such as the marking paper and beige marking paper produced by our company. Paper.

(9) Magazine paper: Lightly coated and calendered printing paper is the most commonly used paper type in magazines, such as the high-end magazine paper and snow-surface magazine paper produced by our company.

2. Dowling paper - printing and writing paper made from chemical pulp. It is currently one of the most commonly used paper types for cultural publishing and printing and binding. For example, the Dowling paper produced by our company has additives The dyes give different paper colors, such as blue and white Dowling paper and beige Dowling paper.

3. Mold-made paper - printing and writing paper made from chemical pulp and part of mechanical pulp. The paper quality is slightly worse than Dowling paper, with a slightly yellow color, good elasticity, strong tensile strength and low price. Cheap and quite commonly used.

4. Laminated paper - it belongs to the Dowling paper category. It has strong toughness and a rough surface to enhance the penetration and adhesion of the laminate. It has the function of waterproofing and moisture-proofing. Our company also produces laminated paper and Yellow coated paper.

5. Printing paper - molded paper specially used for printing books. Due to eye protection, the paper is mostly light beige, and its characteristics are roughly the same as ordinary molded paper.

6. Drawing paper - The paper is slightly milky white in color, does not hurt the eyesight, has strong durability, is resistant to wiping, is lint-free, has strong water absorption and color development power.

7. Securities paper - high-end writing paper that is strong and durable and can be used for securities, high-end documents and letters.

8. Poster paper - Thin-pound single-gloss paper, suitable for posters, slogans, calendars, and ten-line paper.

9. Typing paper - high-grade thin paper for typing and copying, suitable for reports, summonses and letterheads.

10. Bible paper - Contains a large amount of titanium dioxide filler. The paper is light and has high opacity. It is specially used for printing Bibles, dictionaries or aviation expresses.

11. Postal seal paper - single-sided glossy paper used for copying documents and packaging stamps. The paper is extremely strong and has a strong luster on one side.

12. Cigarette paper - contains a large amount of calcium carbonate filler, which acts as a buffer when the paper burns because calcium carbonate decomposes carbon dioxide and prevents the paper from burning too fast.

13. Glassine paper - paper that has been highly beaten and then treated with a strong pressure calender. It is used in packaging, photo albums, stamp albums and other sheets.

14. Newsprint - the main raw material is groundwood pulp, the brightness is required to be above 55GE, and it needs to have appropriate oil permeability.

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◎Household paper - generally refers to consumer cleaning tissue, including: facial tissue, napkins, bath and toilet paper, kitchen paper towels, etc. .

1. Facial tissue - tissue paper used for cosmetics and cleaning. Its raw materials are mostly bleached chemical pulp and spiral pulp, and are processed into wrinkled shape. Its characteristics are not easy to tear, rich in softness, and not easy to fluff. , moisture-resistant, and must not contain migratory fluorescent agents.

2. Napkins - The paper used instead of napkins during meals is generally 100 virgin chemical pulp or mixed with part of virgin mechanical wood pulp. It must also not contain transferable fluorescent agents.

3. Kitchen paper towels - using bleached chemical pulp and adding wet strength agent to make wrinkled paper, which can be used as an alternative to hand towels for wiping in the kitchen.

4. Toilet paper - toilet paper that is moderately soft and easy to absorb water. The products can be divided into wrinkled toilet paper and patterned toilet paper according to the surface condition, and can be divided into roll type (including single layer) according to the structural shape. and double-layer) and flat type (including folding and continuous removable type), the so-called roll is a row of small holes parallel to the axis of the roll at regular intervals so that the paper can be easily torn off the paper roll.

5. Sanitary napkins - generally composed of a covering body, an absorbent body and a leak-proof body. Its texture should be soft and neutral, without stains, impurities and pulp lumps, and its appearance should be free of peeling, fractures and holes.

At present, Zhenglong Company produces "Chunfeng Series" household paper products. The products are as follows: removable facial tissue, pocket tissue, flat toilet paper, roll toilet paper, removable paper towels, kitchen towels, hand towels, etc. product.

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◎Industrial paper

1. Liner board-Kraft board is one of the non-corrugated paper specializing in corrugated board The surface is usually made of unbleached sulfate wood pulp, and the middle and bottom layers can be mixed with waste paper pulp. For example, the kraft paperboard produced by our company has higher bursting strength, ring crushing strength, better printability and appearance, etc.

2. Corrugating medium - Corrugating medium is base paper made from semi-chemical pulp and is used to make the corrugated layer of corrugated board. For example, our company has Dayuan Factory, The second factory in Houli produces corrugated core paper, and its products have high ring pressure strength, flute forming properties, and good paste adhesion.

3. Wrapping paper - Wrapping paper generally refers to paper used for packaging, such as cement bag paper, laminated tar paper, aluminum thin paper, kraft paper for bags, etc.

4. Coated white board - Coated white board refers to one or both sides made of bleached pulp and coated, and the middle layer is made of waste paper pulp or other pulp. Paperboard, such as the single-sided coated white paperboard produced by our company's Houli factory, has good quality, good printability, whiteness, gloss, interlayer strength, and high foldability.

5. Uncoated white board (White board) - a board made of bleached pulp on one or both sides without coating treatment, and the middle layer is made of waste paper pulp.

6. Chip board - Gray cardboard is made from waste paper and is usually made by a rotary screen machine, such as the gray cardboard produced by our company's Hsinchu factory.

7. Base paper for asphalt roofing - Base paper for asphalt roofing is specially used to make linoleum felt after being impregnated with asphalt. It is made of wood pulp waste paper, rags, wool and other raw materials with a loose and soft texture. And still have the appropriate strength of the original paper.

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Information paper:

1. No Carbon Required paper One side of the paper is coated with microcapsules (CB), and inside the capsule Contains pigment, and the other side is coated with a developer (CF side). When used, the CB side must correspond to the CF side. When the paper is pressed, the microcapsules on the CB side rupture, and the pigment escapes and reacts with the developer on the CF side. As for hair color, this principle is used to achieve replication effects. Generally, NCR can be divided into three types: top paper, middle paper, and bottom paper, which can be prepared according to the number of sheets required for copying.

2. Thermal paper (Thermal paper) The surface of the paper is coated with paint containing pigments. This pigment develops color through a chemical reaction when heated. A mobile thermal head can be used to heat the area. Color development, the fax machine uses this principle and combines it with heat-sensitive paper to achieve the function of fax color development.

3. Ink Jet Printing Paper The ink is sprayed directly on the paper surface through the nozzle to develop the image. In order to achieve the characteristics of small diameter, neat edges and high density, the paper must be delicate. Porous structure. In multi-color inkjet printing, in order to reduce burrs, mixing and print-through, the water absorption and water repellency of the paper surface must be strictly controlled.

4. Plain Paper Copy (ppc for short) The paper used in the photocopying machine. In order to make the photocopying operation go smoothly, the paper must have the characteristics of size stability, antistatic, and good carbon ink fixation.

5. Diazo Paper (Diazo Paper) is a positive photosensitive paper made by coating the base paper with diazo liquid. In order to achieve a uniform and detailed photosensitive effect, the base paper must be coated Evenly interwoven, free of impurities, low pH, high glue content and uniform and fine paper surface.

6. Electrostatic Recording Paper The paper surface is coated with a conductive layer and an insulating layer coating, and can accept the voltage emitted from the needle electrode to destroy the insulation on the paper and form a layer with the conductive layer. The electrostatic latent image allows the developer to adhere to the pattern when added, and then is thermally fixed on the paper to produce a clear pattern.

7. Optical Character & Mark Reader Paper: Printed paper used on optical reading machines for reading text. Those who read numbers are called QCR, and those who read special marks are called OMR. Because it is Reading is based on optical absorption or reflection. In order to avoid misreading, the paper has high requirements for cleanliness, smoothness, abrasion resistance, dimensional stability, and resistance to electrification.

8. Magnetic Ink Character Reading paper (MICR paper). The surface of the paper is coated with highly magnetic particulate powder, and the magnetic ink can be used to print patterns that can be recognized by computers. Mainly Used for valuable tickets, such as securities, tickets, passes, etc.

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 does not break when folded. It will stick to dirt and 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.

Container cardboard

Also known as hemp cardboard, it is a relatively sturdy cardboard used in cartons. It is widely used for shipping books, department supplies, 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. 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.

Offset paper

Oldly known as "Dowling paper", it is 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, so it 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 200 g/m2 to 400 g/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 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.

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 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.

Postal cover paper

It is an extremely thin single-sided smooth writing paper with a basis weight of only 20 grams per square meter. It was originally mainly used for stamp backing paper and insured letters. Paper for sealing. 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.

Chinese calligraphy and painting paper

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 history paper is white in color. Both are made of bamboo curtains and are used for printing ancient books, inscriptions, letterheads, fans and other products.

Glossy paper

It 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!

Typing paper

It 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 should not exceed 0.05 mm, that it should be consistent in thickness, that it can be typed and copied on multiple pages at once, that the paper should be strong and flat, and that it will not bleed when writing. Colored typing paper is used for printing multi-part summons or tickets.

Writing paper

It is a kind of cultural paper that is widely consumed. It is suitable for forms, exercise sheets, account sheets, record books, etc. for writing. It is divided into special numbers, There are five grades: No. 1, No. 2, No. 3 and No. 4, with a basis weight of 45 g/m2 to 80 g/m2.

Quality requirements: white color, smooth on both sides, tight texture, and no water smearing when writing.

Gravure paper

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. It is also divided into two types: web paper and flat paper. Gravure paper printing requires high smoothness and shrinkage. The paper should have high whiteness and good smoothness and softness.

Cast coated paper

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 pressed against a highly polished chrome-plated drying cylinder for heating and drying. , 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.

Matt pink paper

The official name is matte coated paper. When viewed under sunlight, it is less reflective than coated paper. Although the patterns printed with it are not as colorful as coated paper, the patterns are more delicate and high-end than coated paper