How is the number of openings of printed paper calculated?

The paper is divided into large paper and positive paper, the largest is full open paper, full open paper folded in half, folio paper folded in half is four open, four open paper folded in half is eight open, and so on... The size of the large paper is large xx open, and the positive paper is positive xx open) The positive degree is smaller than the large degree.

As follows: open paper size (mm) finished product size (mm).

Full open Generous: 889 1194 Generous: 889 1194 Positive:

787 1092 Positive: 787 1092 Folio Generous: 595 885 Generous:

570 875 Positive: 545 785 Positive: 520 7703 Open Generous:

397 885 Generous: 377 875 Positive: 363 785 Positive:

345 770 Ding 3 open Generous: 443 745 Generous: 420 735 Positive:

393 695 Positive: 375 6804 Open Generous: 443 595 Generous:

420 575 Positive: 393 545 Positive: 375 520 Long 4 Open Generous:

295 885 Generous: 285 875 Positive: 270 785 Positive:

260 7705 Open Generous: 490 390 Generous: 380 460 Positive:

320 460 Positive: 300 4406 Open Generous: 395 443 Generous:

375 430 Positive: 363 393 Positive: 350 370 Long 6 Open Generous:

298 595 Generous: 280 575 Positive: 262 545 Positive:

250 5208 Open Generous: 298 443 Generous: 285 420 Positive:

270 393 Positive: 260 37516 Open Generous: 298 220 Generous:

210 285 Positive: 270 195 Positive: 260 18532 Open Generous:

148 220 Generous: 142 210 Positive: 135 195 Positive:

130 18564 Open Generous: 110 148 Generous: 142 105 Positive:

135 97 Positive: 130 90

How to calculate the size when drawing to match the opening number of the printing paper? No waste! Every time I make a drawing, the size of the set is set to want to kiss and open the number and you must know what the size of the open number is. There are two types of paper openings: magnanimity and positivity. Generosity:

Commonly used paper opening methods and folios.

Usually when the user describes the size of the paper, the order of writing the size is to write the short side of the paper first, then the long side, and the texture of the paper (i.e. the longitudinal part of the paper) is represented by M and placed after the size. For example, 880 1230m (mm) means long grain, and 880m 1230 (mm) means short grain. When writing the size of printed matter, especially books and periodicals, the horizontal direction should be written first and then the vertical direction.

The uncut paper is called the whole sheet, and the whole paper is folded in half and the cut format is called folio or half-open; The format of the folio paper after folding and cutting in half is called four openings; The four-open paper is folded in half and cut in half and the format is called the eight-open ,......In addition to cutting the paper in multiples of 2, the paper can also be cut to the size that is actually needed. When the paper is not cut according to the multiple of 2, it can be divided into positive opening method and fork opening method according to the horizontal and vertical directions of each small sheet.

The positive opening method refers to the opening method of the whole sheet of paper in a single direction, that is, the method of opening vertically or horizontally, and the fork opening method refers to the opening method of the whole sheet of paper with horizontal and vertical matching, and the fork opening method is usually used in the case that it is difficult to cut paper in the positive opening method. In addition to the above two types of paper opening method and fork opening method, there is also a mixed paper opening method, also known as the set opening method and irregular paper opening method, that is, the whole paper is cut into more than two sizes of small paper, its advantage is that it can make full use of the paper as much as possible to use the paper.

Due to the difference in the size of the format of different full-open papers, the size of the books with the same number of sheets varies depending on the full-open paper used, such as the copyright page of the book.

"787 1092 1 16" refers to a 16-folio book cut from 787 1092 full-open paper.

Books are suitable for a variety of folios, some need large folios, some need small folios, some need rectangular folios, and some need square folios. These different requirements can only be solved in the cutting of the paper. The cutting method of paper can be roughly divided into geometric cutting method, non-geometric cutting method, bench vertical and special cutting method.

The paper size refers to the size range of the paper that the folding machine can support, which generally includes a maximum size and a minimum size, which is generally expressed by the size of the paper. If the size of the jujube is larger or smaller than this size of paper, the product cannot be folded and paged.

The size of the folio stipulated by the state is the international standard series, which has been set into the national industry standard GB T 1999 and implemented in the country. The current size of the book is mainly A series specifications, which are as follows: A4 (16K) 297mm 210mm; a5（32k）210mm×148mm；A6 (64K) 144mm 105mm, of which A3 (8K) size has not yet been determined, but 420mm is commonly used.

The paper we commonly use is in series A and B formats.

Take the A series of paper as an example: A0 is fully open, A1 is open, A2 is four-open, ......and so on

A series of openings are international standard openings, such as: A0 is the whole sheet, and the result of its positive 16 openings is A4 (210mm*297mm), corresponding:

There are China's domestic commonly used paper openings, such as 787mm*1092mm is the whole paper, and its 16 openings are 185mm*260mm

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.

Positive key calendar degree paper: 787 1092mm

Number of openings (positive) size unit (mm).

2 open 540 780

3 open 360 780

4 open 390 543

6 open 360 390

8 open 270 390

16 open 195 270

32 open 195 135

64 open 135 95

Note: Finished product size = paper size trimming size.

Generous paper: 889 1194mm

Number of open stools (large) Size unit (mm).

2 open 590 880

3 open 395 880

4 open 440 590

6 open 395 440

8 open 295 440

16 open 220 295

32 open 220 145

64 open 110 145

Note: The size of the finished product = the size of the paper manuscript and the trimming size.

The size of the finished print.

Generous 2 open 870 570

3 open 390 870 420 580

4 open 420 580 290 870

8 open 420 285 210 570

16 open 210 285

32 open 210 140 105 285

48folio 95 210

48 open 92 210

Positive 2 open 760 520

3 open 350 760 360 680

4 open 370 520 260 760

8 open 185 520 370 260

16 open 185 260

32 open 185 130 92 260

48 folio 86 185

48 open 83 185

Positive paper rotten: 787 1092mm

Number of liters (positive) Dimensions in (mm).

Full open 781 1086

Folio 530 760

Sankai 362 781

Four open 390 543

Sankai 362 390

Eight open 271 390

XVI 195 271

Note: Finished product size = paper smile mu size trimming size Generous paper: 850 1168mm

How many open is divided according to the number of cuts or the number of folds, one fold is two open that is 2k, two folds is four open that is 4k, three folds is eight open that is, 8k, and so on. In the past, the size of the paper was expressed by the number of carats, such as 8 carats or 16 carats, but now international standards are used to indicate the format of the paper by marks such as A0, A1, A2, B1, and B2.

Opening, Generous Gross Size, Net Size of Finished Product, Positive Gross Size, Net Size of Finished Product.

Full open 1194 889 1160 860 1092 787 1060 760

Folio 889 597 860 580 787 546 760 530

Long folio 1194 1160 430 1092 1060 375

Sankai 889 398 860 350 787 364 760 345

T-shaped 3 open 720 430 680 375

Four open 597 580 430 546 530 375

Chang Si Kai 285 860 787 273 760 260

Wukai 380 480 355 460 330 450 305 430

Liukai 398 370 430 364 345 375

Eight open 430 285 375 260

Nine open 280 390 240 350

Twelve open 285 280 273 260 250

Sixteen Kai 285 210 273 260 185

Eighteen Kai 199 180 280 120 250

Twenty open 270 160 273 260 40

Twenty-four open 210 185 185 170

Twenty-eight open 280 110 273 1260 100

Thirty-two open 210 140 185 130

Sixty-four open 130 100 120 80

a4:210mm×297mm

a5:148mm×210mm

b5:182mm×257mm

a3:297mm×420mm

a2:420mm×594mm

The paper size refers to the size range of the paper that the folding machine can support, generally including a maximum size and a minimum size, which is generally expressed by the size of the paper. If the paper is larger or smaller than this size range, the product cannot be folded and collated.

The size of the folio stipulated by the state is the international standard series, which has been set into the national industry standard GB T 1999 and implemented in the country. The current size of the book is mainly A series specifications, which are as follows: A4 (16K) 297mm 210mm; a5（32k）210mm×148mm；A6 (64K) 144mm 105mm three kinds, of which A3 (8K) size has not yet been determined, but generally used 420mm.

Ordinary printing paper is divided into positive paper and large paper. (One is a domestic standard and the other is an international standard.) ）

Degree Degree Degree Paper (unit mm) Degree Degree Positive Paper (unit mm).

Full open 889 1194 Full open 787 1092

Folio 590 880 Folio 780 540

Sankai 889 390 Sankai 787 360

Four-open 590 440 four-open 390 540

Liukai 440 390 Liukai 390 360 Bakai 420 285 Bakai 390 265

Sixteen Kai 210 285 Sixteen Kai 185 260

Thirty-two open 210 140 thirty-two open 185 130

Sixty-four open Sixty-four open 9 130

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 or 16 carat, etc.) to indicate the size of the paper, and now China adopts international standards, stipulating that A0, A1, A2, B1, B2 and so onand 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.