What are the types of paper and what are the paper size specifications?

There are three types of common paper sizes: A, B, and C, Class A paper has A0, A1, A2, A3, A4, A5, A6, A7, and Class paper has B0, B0, B1, B2, B3, B4, B5, B6, B7, and group paper sizes are mainly used for envelopes.

Class A paper size:

A0 paper: the size is 841mm*1189mm.

A1 paper: the size is 594mm*841mm.

A2 paper: 420mm*594mm, large 4-open paper.

A3 paper: 297mm*420mm, large 8-carat paper.

A4 paper: 210mm*297mm, 16 sheets of paper.

A5 paper: 148mm8210mm, 32 open paper.

A6 paper: 105mm*148mm, 64 open paper.

A7 paper: the size is 74mm*105mm.

A8 paper: the size is 52mm*74mm.

Basic introduction. The paper size of the original used for copying is also relatively large, and the general model can range from the maximum A3 (297x420mm) to the smallest business card (50x90mm). At the same time, the size of the paper used for copying is required from the maximum 290x395mm to the minimum B5 90x140mm, and its maximum printing area can reach 251x357mm, which is equivalent to 80% of the maximum paper area.

It also offers multi-level scaling. For example, the 4-level zoom ratio provides 4 levels of 94%, 87%, 82%, and 71% for users to choose independently.

Paper size specifications are A3, A4, A5, etc. Fold a whole piece of paper in half once, and the size obtained is the folio, and then fold it in half to make it four, fold it in half to get eight, and fold it in half to get sixteen. For example, A3 paper (297mm 420mm) is twice as much as A4 (210mm 297mm), 16K is twice as much as 32K, 8K is twice as much as 16K, and 4K is twice as much as 8K.

Newspapers are generally more than four open, and eight after being folded in half. The homework book for elementary school students is 32 carats, and the size of a typical magazine is 16 carats. Books are generally 32 and magazines are generally 16, but there are also 16 books and 32 magazines.

The same size (such as the same thirty-two open) books also have size, which is determined by the size of the whole sheet used in printing, and the specifications of the whole sheet of paper generally used for book printing are as follows: 787 1092mm, 850 1168mm, 880 1230mm, 889 1194mm, etc.

Eight of the sizes are generally rough if they are used for newspaper printing, so they are slightly larger than the sizes given above. No. 880 and No. 889 papers, mainly for odd-shaped and international folios. The size of the paper used to print books depends on the size of the finished product required by the publisher, as well as the typesetting and printing technology.

Paper size refers to the size range of the paper that the folding machine can support, the common paper size has three types: A, B, and C, Class A paper has A0, A1, A2, A3, A4, A5, A6, A7, and Class paper has B0, B0, B1, B2, B3, B4, B5, B6, B7, and the group paper size is mainly used for envelopes.

1. A series.

a0：841×1189mm

a1：594×841mm

a2：420×594mm

a3：297×420mm

a4：210×297mm

a5：148×210mm

a6：105×148mm

a7：74×105mm

a8：52×74mm

a9：37×52mm

a10：26×37mm

2. B series.

b0：1000×1414mm

b1：707×1000mm

b2：500×707mm

b3：353×500mm

b4：250×353mm

b5：176×250mm

b6：125×176mm

b7：88×125mm

b8：62×88mm

b9：44×62mm

b10：31×44mm

3. C series.

c0：917×1297mm

c1：648×917mm

c2：458×648mm

c3：324×458mm

c4：229×324mm

c5：162×229mm

c6：114×162mm

c7：81×114mm

c8：57×81mm

c9：40×57mm

c10：8×40mm

Key points for purchasing ordinary printing paper.

1. The thickness of the paper.

The thickness of paper is usually expressed in weight (grams) per square meter, and the thickness specification of ordinary printing paper and copy paper is 70 to 80 grams square meters.

2. The density of the 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 coarse (i.e., the density is poor), when using an inkjet printer, it will lead to water immersion on the reverse side, poor printing results, and it is easy to produce paper wool and paper scraps, which will damage the printer.

3. The stiffness of the paper.

The stiffness of the paper refers to the stiffness of the texture of the paper. If the stiffness is poor, it is easy to encounter a little resistance in the paper feeding channel, and the paper will produce crepe and even blockage, so you should choose printing paper with good firmness.

1. A series.

a0：841×1189mm

a1：594×841mm

a2：420×594mm

a3：297×420mm

a4：210×297mm

a5：148×210mm

a6：105×148mm

a7：74×105mm

a8：52×74mm

a9：37×52mm

a10：26×37mm

2. B is the royal row.

b0：1000×1414mm

b1：707×1000mm

b2：500×707mm

b3：353×500mm

b4：250×353mm

b5：176×250mm

B6: Carefully dismantle 125 176mm

b7：88×125mm

b8：62×88mm

b9：44×62mm

b10：31×44mm

3. C series.

c0：917×1297mm

c1：648×917mm

c2：458×648mm

c3：324×458mm

c4：229×324mm

c5：162×229mm

c6：114×162mm

c7：81×114mm

c8：57×81mm

c9：40×57mm

c10：8×40mm

Introduction to the standardAccording to the basic area of the paper format, the format specifications are divided into A series, B series and C series, and the format size of A0 is: 841mm 1189mm, and the format area is 1 square meter; The format size of b0 is 1000mm 1414mm, and the area is square meters.

The format size of C0 is 917mm 1297mm, and the format area is square meters; Only A series and B series are used in the format specifications of copy paper.

If the A0 paper is split into two equal parts along the length, it becomes the A1 format, and if the A1 paper is split along the length, it becomes the A2 format, and so on to the A8 format; B0 paper is also folked to B8 size according to this method. The format sizes of A0 A8 and B0 B8 are shown in the table below. Among them, A3, A4, A5, A6 and B4, B5 and B6 are the commonly used specifications for copy paper.

Commonly used paper sizes are:

a4（16k）297mm×210mm；

a5（32k）210mm× 148mm；

a6（64k）144mm×105mm；

a3（8k）420mm×297mm。

The specification of paper refers to the fact that after the paper is made, it is trimmed and cut to a certain size. How much in the past"On"(e.g. 8 carat or 16 carat, etc.) to express the size of the paper, and now I use the international standard, which stipulates that it is A0, A1, A2, B1, B2, etcand so on to indicate the format of the paper.

The standard stipulates that the ratio of the width (denoted by x) and the length (denoted by y) of the paper is x:y=1:n.

Basic introduction. According to the size of the folio, there are usually three types: large folio, medium folio, and small folio. In the case of 787 1092 paper, more than 12 folios are large folios, 16 36 folios are medium-sized folios, and less than 40 folios are small folios, but books with mainly text are generally medium-sized folios.

Except for 6 open, 12 open, 20 open, 24 open, and 40 open about a square, the rest are rectangles with different proportions, which are suitable for all kinds of books with different properties and uses.

The above content reference: Encyclopedia - Paper Size.