Halo, it depends on the type of printer you have and your usage, hey!

There are black and white printing and color printing, and printing is divided into economical printing and fine printing, single-sided printing and For double-sided printing, use a larger paper size of A4, which is about the same as A3 paper.

Classification by length and width

The specifications of paper 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 (represented by X) and length (represented by Y) of the paper 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 specification of A0 is 841mm×1189mm, the format area is 1 square meter; the format of B0 The size is 1000mm×1414mm, the format area is 2.5 square meters; the format size of C0 is 917mm×1279mm, 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 is 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: The size of A3 (8k) has not been determined yet, but it is commonly used. A4 (210*297mm) paper is generally 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, American Standard.

The corresponding sizes of different types of paper are as follows:

Paper size

2. Classification according to weight or thickness:

There are also those according to paper Divided by thickness, such as 60g, 70g, 75g, 80g, 85g, 90g, 100g, 120g, etc., it refers to the weight of paper per square unit area, because the density of paper is basically the same. The heavier the weight, the thicker the paper. For example, general speed printing machines use about 40g paper, while all-in-one machines use 50-60g paper, and copiers use 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.)

Classification by size and number of layers

Computer printing paper used in office automation series dot matrix printers is classified according to the size and number of layers of the paper, such as 241-1 and 241-2, which represent 1-layer and 2-layer narrow paper respectively. Line printing paper, of course, there are 3 layers and 4 layers; commonly used wide line printing papers include 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, clinic, 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.

Introduction to purchasing carbonless printing paper

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 develops 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.

About 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, horizontal equal parts, vertical equal portions, 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 plastic bag to prevent moisture, loss, etc. If it is carbonless copy printing paper, be careful not to be exposed to sharp objects or objects. Squeeze with external force to avoid color development, etc., which will affect the 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.

Receipt printers or push-type printers are most suitable for multi-link carbonless printing paper products. These printers are designed so that the paper does not bend inside the machine, the paper lies flat, and the printing force is high.

The color of carbonless paper is not clear

The lack of color 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, which is greatly affected by the ambient temperature. Especially in winter when the temperature is low, the chemical reaction activity is slow, and the clear writing cannot be seen immediately 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. Thickness of paper

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~

Ordinary Printing paper

80 g/m2.

2． Density of paper

The density of paper refers to the density and thickness of the fibers of the paper. If the fibers of the paper are too sparse and too thick (that is, 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. The 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 high a brightness is detrimental to the fixation of the image.

5． Dryness of the paper

If the printing paper has low dryness and high water content, the insulation properties of the paper will be reduced, which will affect the printing effect. The background will be dusty and paper jams will easily occur. Therefore , choose printing paper with high dryness. On the other hand, the paper 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 paper categories

Newsprint

Commonly known as white newspaper, it is characterized by being soft and porous, with a certain structural strength, good absorbency, and can make ink It penetrates and fixes in a very short time and does 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 * 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.

Crateboard

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 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.

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 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 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.

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. It is mostly used in cosmetics, fruit and food packaging and cigarette linings. After printing and waxing, it can be used as candy wrappers, 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.

Traditional Chinese 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 snowdrop paper. There are three types: Special No., 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

It is a thin paper used for typing and copying. It 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

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 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.

Matt pink paper

The official name 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.