What should you pay attention to when using computer printing paper?

Printing paper refers to a kind of paper used for printing and copying documents. The specifications include A0, A1, A2, B1, B2, A4, A5, etc. The thickness specifications of commonly used ordinary printing paper and copy paper are 70 to 80 g/m2. The specifications of paper classified by length and width refer to the fact that after the paper is made, it is trimmed and trimmed to a certain size. In the past, the size of the paper was expressed by how many "opens" (such as 8 open or 16 open, etc.). I adopted the international standard, which stipulates that the format of the paper is represented by marks such as A0, A1, A2, B1, B2, A4, A5. Specification. The standard stipulates that the proportional relationship between the width of the paper (represented by X) and the length (represented by Y) is X:Y=1:n. According to the basic area of ??the paper format, the format specifications are divided into A series, B series and C series. The format size of A0 is 841mm×1189mm, the format area is 1 square meter; the format size of B0 is 1000mm×1414mm, the format The area is 2.5 square meters; the format size of C0 is 917mm×1279mm, and the format area is 2.25 square meters; the format specifications of copy paper only use A series and B series. If A0 paper is cut into two equal lengths, it will become A1 size. If A1 paper is cut in half along the length direction, it will become A2 size. Then it will be cut into A8 size. B8 paper will also be cut into B8 size in the same way. Specification. The format sizes of A0~A8 and B0~B8 are listed in the table below. Among them, 7 format specifications, including A3, A4, A5, A6 and B4, B5 and B6, are commonly used specifications for copy paper. For example, "A4" paper is to fold the A-type basic size paper 4 times, so the area of ??an A4 paper is one-fourth of 2 to the power of 2 of the basic paper area, that is, 1/16. The rest can be deduced in this way. There is also a kind of K-type paper, which is what we often call open-type paper. K-type paper is only available in China. Generally, A-type paper is used. Regardless of type A or type B, its classification is the same. For example, A5 is twice the size of A6, A4 is twice the size of A5, A3 is twice the size of A4, B4 is twice the size of B5, B3 is twice the size of B4, and K-type classification is to divide a large 1K paper into two pieces as 2K, divide the 2K paper into half as 4K, divide the 4K paper into half as 8K, divide 8K into half as 16K, and divide 16K into Half would be 32K etc. The format size specified by the state is an international standard series, which has been incorporated into the national industry standard GB/T 1999 and will be implemented nationwide. The current format sizes of books and periodicals are mainly A series specifications, which are as follows: A4 (16k) 297mm × 210mm; A5 (32k) 210mm × 148mm; A6 (64k) 144mm × 105mm; A3 (8k) 420mm × 297mm; note : Among them, A3 (8k) size has not been finalized, but it is commonly used. A4 (210*297mm) paper is commonly used internationally for printing and copying, but the United States and some countries use abnormal A4 specification paper: 216*279mm, commonly known as American Standard. US regulations. The corresponding sizes of different types of paper are as follows: 2. Classification according to weight or thickness: There are also classifications according to the thickness of the paper, such as 60g, 70g, 75g, 80g, 85g, 90g, 100g, 120g, etc., which refers to the square unit area The weight of paper is how heavy it is because the density of paper is basically the same. The heavier the paper is per unit area, the thicker the paper is. For example, the general speed printing machine uses about 40g paper, while the all-in-one machine uses 50-60g paper, and the copier uses 70-85g paper. Printers generally do not use paper thicker than 60g. Otherwise, paper jams may occur easily. For example: 70 grams of A4 paper means that the weight of the paper is 70 grams per square meter, rather than the weight of a single piece of paper 70 grams. The actual weight of an A4 paper with a basis weight of 70 grams is: 0.210×0.297×70=4.3659

Reference materials: (Most offices in the south and coastal areas use 80g paper, while inland and northern areas mainly use 70g printing paper for office work.) Office automation series dot matrix printers are classified according to size and number of layers. Computer printing paper is classified according to the size of the paper and the number of layers, such as 241-1 and 241-2, which represent 1-layer and 2-layer narrow-line printing paper respectively, and of course there are 3-layer and 4-layer paper; commonly used There are also wide-line printing papers such as 381-1, 381-2, etc.

For example: 241-2 refers to carbonless printing paper (also called pressure-sensitive paper, computer printing paper, computer paper, etc.), which can only be printed on dot matrix printers. 241 represents: 9.5 inches, which is the width of the paper. This kind of paper is also called 80-column printing paper (width 9.5 inches * top and bottom height 11 inches), that is to say, normal font, 80 characters per line (that is, 80 columns words, referred to as 80 columns). The main uses of these papers are: outgoing/incoming orders, financial statements, sea and air waybills, guest room orders, consumption bills, bank bills. Main applications: government departments, enterprises, banks, hospitals, express companies, supermarkets, hotels, KTV, outpatient department, terminal, air and sea transportation, etc. 2 Carbonless printing paper Carbonless printing paper, also known as pressure-sensitive printing paper, consists of upper paper (CB), middle paper (CFB) and lower paper (CF). It uses the principle of chemical reaction between the color-developing agent of microcapsules and the acidic clay in the developer layer. When printing, the printing needle is pressed on the paper surface to achieve the color development effect. The common and commonly used number of color development layers is 2 to 6 layers. When purchasing carbonless printing paper, you should pay attention to whether the outer packaging of the paper is damaged (if the outer packaging is damaged or deformed, it may cause the paper inside to develop color). B: Open the outer package and check whether the package inside has a certificate of conformity, whether the paper is damp and wrinkled, and whether the color development can meet your desired requirements (usually tear off a copy and write a few words on it in normal writing. words, and then look at the color development of the last layer) C: Confirm whether the specifications of the printing paper are what you need, so as to avoid unnecessary waste and trouble. Regarding carbonless printing paper specifications, the commonly used carbonless printing paper specifications are 80 columns or 132 columns, and there are also special specifications (width, length, equal parts horizontally, equal parts vertically, etc.). The most commonly used one is 80 columns, the size is: 9.5 inches 80-column paper is usually divided into three specifications: 1: Full page (9.5 inches X11 inches). 2: Two-and-a-half (9.5 inchesX11/2 inches). 3: One-third (9.5 inches X 11/3 inches). After unpacking, please note that if it is not used for a long time, it should be placed in the original packaging plastic bag to prevent moisture, damage, etc. If it is a carbonless copy printing paper, be careful not to be squeezed by sharp objects or external forces to avoid visible damage. Color, etc., affect use. Before using the product, you should confirm the printer's setting. When printing multiple layers, try not to print at high speed to ensure the clarity of the printed handwriting. When saving documents, attention should be paid to keeping each page separately. If they must be mixed and stored together, avoid squeezing. It should be protected from light, water, oil, acid and alkali. As long as in the right environment, carbonless printing paper can be preserved for at least 15 years. If a paper jam occurs during printing, check whether the position of the printing paper is appropriate, whether it is aligned with the tractor, and whether the print head has selected a position suitable for the number of paper layers. Multi-link carbonless printing paper products are most suitable for receipt printers or push-type printers. These printers are designed so that the paper does not bend inside the machine, the paper lies flat, and the printing force is high. If the color of carbonless paper is unclear or not, it may be caused by the printing paper being loaded upside down. Just reload the paper. The reason for unclear color development may be that the pressure of the printer is insufficient or the print head has a broken needle. You can increase the printing intensity and check whether a broken needle occurs. Color development is a chemical process that is greatly affected by the ambient temperature. Especially in winter when the temperature is low, the chemical reaction activity is slow and the handwriting cannot be seen clearly after printing. This is normal. Key points for purchasing ordinary printing paper When purchasing an ordinary printer, you need to refer to the following points when choosing: 1. Paper Thickness The thickness of paper is usually expressed in terms of weight (grams) per square meter. The thickness specifications of commonly used ordinary printing paper and copy paper are 70 to 80 grams/square meter. 2. Density of paper The density of paper refers to the density and thickness of the fibers of the paper. If the fiber of the paper is too sparse and too thick (i.e. the density is poor), when using an inkjet printer, the reverse side will be soaked in water, resulting in poor printing results, and it is also easy to produce paper fluff and paper dust, which can damage the printer. 3． Stiffness of paper The stiffness of paper refers to the firmness of the paper's texture. If the stiffness is poor, it is easy for the paper to crease or even block when it encounters a little resistance in the paper feeding channel, so printing paper with good stiffness should be selected. 4. Surface glossiness of paper The surface glossiness of paper refers to the brightness of the paper surface. The color of the paper should be white, not dark, and the brightness should not be too high. Too much brightness is detrimental to the fixation of the image.

5. Dryness of the paper. If the printing paper has low dryness and high moisture content, it will reduce the insulation performance of the paper, thus affecting the printing effect. It will have a large gray background and will easily cause paper jams. Therefore, it is necessary to choose a paper with a high dryness. Printing paper, on the other hand, should be kept moisture-proof and stored in a dry and ventilated place. 6. Quantity of paper Printing paper quantity unit: ream. 1 order = 500 sheets. 3 Other commonly used newsprint is commonly known as white newspaper. It is characterized by being soft and porous, with certain structural strength and good absorbency. It can make the ink penetrate and fix in a short time and will not stick when folded. It is used for printing newspapers on high-speed rotary machines. , journals and general books. 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 * 1092 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. Box cardboard, also known as hemp cardboard, is a relatively sturdy cardboard used in cartons. It is widely used for shipping books, department supplies, radios, televisions, machine parts, and food. 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, is a high-grade printing paper made by coating a base paper with a layer of white paint made of calcium carbonate or white clay and an adhesive, drying and calendering. 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, formerly known as "Daoling paper", 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. Letterpress paper is 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, is 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, 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. The important materials for binding cardboard book boxes 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. The appearance of calcium carbonate paper is very similar to that of 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 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 is a tough, water-resistant packaging paper that is brown in color and has 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, 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 sealing paper 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 sealing paper for insured letters. 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. Paper used for traditional Chinese painting 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 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, also known as slogan paper, is mainly used for writing slogans. Typing paper is thin paper used for typing and copying, and is 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 is a kind of cultural paper that is widely consumed. It is suitable for forms, practice sheets, account sheets, record books, etc. It is used for writing. It is divided into five grades: special number, No. 1, No. 2, No. 3 and No. 4. , the basis weight is 45g/m2 to 80g/m2. Quality requirements: white color, smooth on both sides, tight texture, and no water smearing when writing. Gravure paper is 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, 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. The official name of matte paper is matte coated paper. When viewed under sunlight, it is less reflective than coated paper. The patterns printed with it are not as colorful as copper plate paper.