A1,A2,A3,A4 Paper Format Specifications

Paper Format Specifications:

Paper Specification refers to the paper is made, after trimming cutting edge, cut into a certain size. In the past, how much "open" (such as 8 open or 16 open, etc.) to indicate the size of the paper, now I use international standards, the provisions of A0, A1, A2, B1, B2 ... and other markings to indicate the size of the paper. The standard specifies that the width of the paper (denoted by x) and the length (denoted by Y) are proportional to X:y=1:.

According to the basic area of the paper format, the format specification is divided into a series, B series and C Series, the format size of A0 for the format of 841mmx1189mm, the format area of 1 square meters, the size of the B0 is 1000mmx1414mm, The format area is 2.5 square meters, the format size of C0 is 917mmx1279mm, the format area is 2.25 square meters, and the size of copy paper is only a series and B series. If the A0 paper is divided into two equal portions along the length, it becomes the A1 specification, will be a paper along the length of the direction of the A2 specifications, so off to A8 specifications; B8 paper also according to this method to B8 specifications. The format dimensions of A0~a8 and B0~b8 are shown in the table below. Among them A3, A4, A5, A6 and B4, B5, B6 7 kinds of format specifications for copy paper commonly used specifications.

If the paper Specification mark letter with a letter R (or s), is to indicate that the paper has no cutting edge, after trimming, will be reduced to the standard size, for example, RA4 (or SA4) means that the size of the non-cutting paper is 240mmx330mm, after trimming the size of the 210mmx297mm.

If the magnification or magnification to reduce the copy, the use, the size of the copy paper has a corresponding relationship, such as listed, for the variable-fold copy of the paper format to choose the size of the reference; For example, if the A3 amplitude The manuscript magnification of the face 1:1.22, the copy paper should be used B3 format specifications, if the magnification is reduced by 1:0.8, the copy paper should be B4 specifications, if the magnification is reduced by 1:0.7, the copy paper should be used A4 specifications. The specifications of the A5, B5, B6 three-picture double-frame in the table represent very little use.

Two Selection of copy Paper

1. The thickness of the paper

The thickness of the paper is usually expressed as the weight per square metre (grams), the general electrostatic copier paper thickness specifications for 64~80 grams/square meters.

2. The density of the paper

The density of paper refers to the degree to which the fiber of paper is dense and thick. If the paper fiber is too sparse and too coarse (that is, the density is poor), copy image of the resolution is relatively poor, but also easy to produce paper wool, confetti, stolen copy of the copier, so that the copy produced bottom Ash, it is appropriate to choose high-density copy paper.

3. The stiffness of the paper

Paper stiffness refers to the strength of the paper texture. If the stiffness is poor, easy in the paper transmission channel slightly encountered a little resistance, paper produced crepe and even blocked, so should choose a good copy paper.

4. The surface luminosity of the paper

The surface luminosity of paper refers to the degree of light on the surface of a paper. Paper color should be white, not gray color, light level does not need to be too high, light brightness is too high for image fixing unfavorable.

5. Drying degree of paper

Copy paper If the drying degree is low, the water content is large, will reduce the paper insulation performance, which will make copies of the image (or handwriting) shallow, the bottom ash large, but also prone to paper jam phenomenon, therefore, to choose high-drying copy paper, on the other hand, the storage of paper should pay attention to moisture, to store in the dry and ventilated

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A1,A2,A3,A4 size of paper, pixel conversion, ABC paper size 2009-05-31 22:18 in the picture before the time never thought to do a large size, always feel the pixel conversion to our usual millimeters, centimeters and other basic units difficult, but also to consider the size of the resolution, the last confidence To make a resume cover, the picture of the effect is very good, but with A4 paper printed out of the fuzzy and ugly, today specializes in this problem, in fact, it is not difficult, the analysis is as follows:

A4 paper Size is 210mm*297mm, that is 21.0cm*29.7cm, and 1 inches =2.54cm, when the resolution is 72 pixels per inch, we convert it to pixels/centimeters is 28.3, now, we converted it to make the picture when the pixel is (21*28.3) * (29.7*28.3), i.e.: 595*842 (in pixels);

In the same way, we can get:

When the resolution is 300 pixels per inch, the A4 size is 2479*3508 pixels;

When the resolution is 120 pixels per inch, the A4 size is 1487*2105 pixels.

So if you want to print out the pictures, it is best to convert, otherwise it will probably reduce the quality of the picture! In general, if it is printed, preferably 300 pixels per inch, if it is a printer or inkjet, you can choose the resolution of 72 pixels per inch.

a0=1189*841mm

a1=841*594mm

a2=594*420mm

a3=420*297mm

a4=210*297mm

Group A

A0 841x1189 mm

A1 594x841

A2 420x594

A3 297x420

A4 210x297

A5 148x210

A6 105x148

A7 74x105

A8 52x74

A9 37x52

A10 26x37

Group B

B0 1000x1414 mm

B1 707x1000

B2 500x707

B3 353x500

B4 250x353

B5 176x250

B6 125x176

B7 88x125

B8 62x88

B8 62x88

B9 44x62

B10 31x44

Group C

C0 917x1297 mm

C1 648x917

C2 458x648

C3 324x458

C4 229x324

C5 162x229

C6 114x162

C7 81x114

C8 57x81

DL 110x220

C7/6 81x162

The aspect ratio of a group of paper sizes is 1:√2, and then the nearest millimeter value is shed. A0 is defined as a paper with an area of one square metre and a aspect ratio of 1:√2. The next A1, A2, A3 ... such as paper size, are defined as the number of the paper is a small number along the long side of the fold, and then shed to the nearest millimeter value. The most commonly used paper size is A4, which is 210 times 297 mm in size.

The B-group paper size is the geometric average of a group of paper with the same number and a number less. For example, B1 is the geometric average of A1 and A0. Similarly, the C Group of paper size is the same number of a, B group of paper geometric average. For example, C2 is the geometric average of B2 and A2. (In addition, Japan has an incompatible B-group paper size, which is defined using arithmetic averages rather than geometric averages.) ）

Group C paper size is mainly used in envelopes. A A4-sized piece of paper can be placed just in a C4-sized envelope. If you fold A4 paper into A5 paper, it can just fit into the C5-sized envelope, and so on.

A4 Size: 210*297 mm

Paper Specification refers to the paper is made, after trimming cutting edge, cut into a certain size. In the past, how much "open" (such as 8 open or 16 open, etc.) to indicate the size of the paper, now I use international standards, the provisions of A0, A1, A2, B1, B2 ... and other markings to indicate the size of the paper. The standard specifies that the width of the paper (denoted by x) and the length (denoted by Y) are proportional to x:y=1:n.

According to the basic area of the paper format, the format specification is divided into a series, B series and C Series, the format size of A0 for the format of 841mmx1189mm, the format area of 1 square meters, the size of the B0 is 1000mmx1414mm, The format area is 2.5 square meters, the format size of C0 is 917mmx1279mm, the format area is 2.25 square meters, and the size of copy paper is only a series and B series. If the A0 paper is divided into two equal portions along the length, it becomes the A1 specification, will be A1 paper along the length of the direction of the A2 specifications, so off to A8 specifications; B8 paper also according to this method to B8 specifications. The format dimensions of A0~a8 and B0~b8 are shown in the table below. Among them A3, A4, A5, A6 and B4, B5, B6 and other 7 kinds of format specifications for copy paper commonly used specifications.

Example: "A4" paper, is the type a basic size of paper folded 4 times, so a A4 paper area is the basic paper area of 2 of 4 of the square, that is, 1/16. The rest and so forth.

A4 is an international standard paper size 210*297mm

The size of A4 paper is 210mmx297mm,

When you set the resolution to 72 pixels per inch, the pixel of the A4 paper size image is 595x842,

When you set the resolution to 150 pixels per inch, the pixel of the A4 paper size image is 1240x1754,

When you set the resolution to 300 pixels per inch, the pixel of the A4 paper size image is 2479x3508,

You choose a different resolution, and the image pixel size also varies.

Of course, don't forget 1 inches = 25.4 millimeters.

A4 is 2480*3508 pixels 210*297 mm

The size of A4 paper is 210mmx297mm,

When you set the resolution in Photoshop to 72 pixels per inch, the pixel of the A4 paper size image is 595x842,

When you set the resolution in Photoshop to 150 pixels per inch, the pixel of the A4 paper size image is 1240x1754,

When you set the resolution in Photoshop to 300 pixels per inch, the pixel of the A4 paper size image is 2479x3508,

You choose a different resolution, and the image pixel size also varies.

Of course, don't forget 1 inches = 25.4 millimeters.

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A1,A2,A3,A4 paper's format size