Printing Paper Thickness Reference Manual
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First, the concept of opening and opening
Usually, a flat sheet of paper cut according to national standards is called full-open paper. Under the premise of not wasting paper, facilitating printing and binding production operations, cutting a full-open paper into a number of small sheets of equal area is called how many openings; how to bind them into a book is called how many copies.
For the text of a book, the opening number has the same meaning as the opening, but the opening number of the cover and the insert paper is different because of its different area. Usually the size of a single-page publication is called opening, such as newspapers, wall charts, etc., divided into full, open, four open and eight open.
Since there are several different series of international and domestic paper formats, although they are all cut into the same number, the size of the specifications is different. Although they are collectively referred to as the number of copies after they are bound into books, the size of the books is different. For example, the size of the current 16-page book is: 188 × 265 (mm), 210 × 297 (mm), and the like. In actual production, a full sheet of paper having a web size of 787×1092 (mm) or 31×43 inches is usually called a positive paper; a full sheet of paper having a web of 889×1194 (mm) or 35×47 inches is called For generous paper. Since the 787×1092 (mm) paper is self-defined and inconsistent with international standards, it is a non-standard version that needs to be phased out. Due to many reasons such as domestic papermaking equipment, paper and existing paper type, the old and new standards still need a transitional stage. At present, the size of the cutting specifications is: large 16-open 210×297 (mm), large 32-open 148×210 (mm) And large 64 open book 105 × 148 (mm); positive: 16 open 188 × 265 (mm), 32 open 130 × 184 (mm), 64 open 92 × 126 (mm).
Second, the common paper opening and opening
1, the original paper size
Commonly used printing base papers are generally divided into two types: web and flat paper.
According to the national standard (GB147-89), the width of the web is: (unit: mm)
1575 1562 1400 1092 1280 1000 1230 900 880 787
The flat paper size is: (Unit: mm)
1000M×1400 880×1230M 1000×1400M 787×1092M
900×1280M 880M×1230 900M×1280 787M×1092
Where: M indicates the longitudinal direction of the paper
Allowable deviation: web width deviation is ±3mm
Flat paper web size deviation ± 3mm
2, the common paper opening and opening
Usually when the user describes the paper size, the order of the size writing is to write the short side of the paper first, and then write the long side. The texture of the paper (ie, the longitudinal direction of the paper) is indicated by M and placed after the size. For example, 880 × 1230 M (mm) indicates long lines, and 880 M × 1230 (mm) indicates short lines. Prints, especially books, should be written horizontally before writing in the vertical direction.
In order to make it easy to fold into a book when binding books, the printing paper is shown in Figure 2-1, and most of them are cut in 2 times.
The uncut paper is called full sheet, and the folded sheet is called split or half open; the folded sheet is folded and cut to be four-open; The paper is folded in half and then cut into a plane called eight open, .... Usually, the paper is cut in multiples of 2, and can be cut to the actual size required. When the paper is not cut by a multiple of 2, it can be divided into a tangent method and a fork opening method according to the opening and closing method of each small sheet.
The positive opening method refers to the method of opening the whole sheet of paper in a single direction, that is, the method of being vertically or uniformly opened, as shown in Appendix 2-2.
The fork opening method refers to the opening method of the full sheet of paper horizontally and vertically, as shown in Figure 2-3. The divergence method is usually used in the case where it is difficult to cut the paper by the normal opening method.
In addition to the two methods of opening the paper and the fork opening method described above, there is also a mixed paper opening method, also known as a sleeve opening method and an irregular paper opening method, in which a full sheet of paper is cut into two or more web sizes. The advantage of the small paper is that it can make full use of the paper format as shown in Figure 3-4, using paper as much as possible. The hybrid method is very flexible and can be arbitrarily matched according to the needs of the user. There is no fixed format.
3, commonly used copies
(1). A degree paper (size of printed products, copy paper and printing paper):
Paper degree Inches Millimeter (mm)
4A 661/4*933/5 1682*2378
2A 463/4*661/4 1189*1682
A0 331/8*463/4 841*1189
A1 233/8*331/8 594*841
A2 161/2*233/8 420*594
A3 113/4*161/2 297*420
A4 81/4*113/4 210*297
A5 57/8*81/4 148*210
A6 41/8*57/8 105*148
A7 27/8*41/8 74*105
A8 2*27/8 52*74
A9 11/2*2 37*52
A10 1*11/2 26*37
(2). RA degree paper (general printing paper, after trimming, can get A degree printing finished product size):
Paper degree Inches Millimeter (mm)
RA0 337/8*48 860*1280
RA1 24*337/8 610*860
RA2 167/8*24 430*610
(3). SRA paper (paper used for bleeding prints, characterized by a wide format)
Paper degree Inches Millimeter (mm)
SRA0 337/8*48 900*1280
SRA1 24*337/8 610*900
SRA2 167/8*24 450*610
(4). B degree paper (paper between A degrees, mostly used for printed products of larger finished size, such as wall charts, posters):
Paper degree Inches Millimeter (mm)
4B 783/4*1113/8 2000*2828
2B 555/8*783/4 1414*2000
B0 393/8*555/8 1000*1414
B1 227/8*393/8 707*1000
B2 195/8*227/8 500*707
B3 137/8*195/8 353*500
B4 97/8*137*8 250*353
B5 7*97/8 176*250
(5). C degree paper (envelope for enclosing A degree files, file box (clip)):
Paper degree Inches Millimeter (mm)
C0 361/8*51 917*1297
C1 251/2*316/8 648*917
C2 18*251/2 458*648
C3 123/4*18 324*458
C4 9*123/4 229*324
C5 63/8*9 162*299
C6 41/2*63/8 114*162
C7/6 31/4*63/8 81*162
C7 31/4*41/2 81*114
DL 34/8*85/8 110*220