Hexagonal division: positive degree 185*260mm/ elegance 2 10*285mm.
Thirty-two quarts: positive degree 185* 130mm/ elegance 142*2 10mm.
According to the size, folio is usually divided into three types: large format, medium format and small format. For 787× 1092 paper, 12 format is large format, 16 ~ 36 format is medium format, and 40 format is small format, but books with mainly characters are generally medium format.
Folio shapes are rectangles with different proportions except 6 quarts, 12 quarts, 20 quarts, 24 quarts and 40 quarts, which are suitable for books with different properties and uses.
Extended data:
First, ordinary size
The specification of 787× 1092 mm flat base paper is the main specification of cultural paper in China at present, and most of the existing papermaking and printing machines in China produce and apply this specification of paper. At present, this size of paper is still used in Southeast Asian countries, and it is rarely used in other regions.
The size of 850× 1 168mm is made on the basis of 787× 1092mm 25 to meet the needs of large format. This size of paper is mainly used for the needs of large format, and the so-called large 32 format is made of this paper.
The size of 880× 1230mm paper is larger than other papers of the same format, so the utilization rate of paper is higher when printing, and the form is more beautiful and generous, which is an international standard.
Therefore, according to the size of the base paper, there are theories such as 16 wide opening and 16 positive opening.
Second, international standards.
The specification of paper refers to that after the paper is made, it is trimmed and cut into a certain size. In the past, the size of paper was expressed by the number of "open" (for example, 8 open or 16 open, etc. ). At present, China adopts international standards, which stipulate that the format and specifications of paper should be represented by A0, A 1, A2, B 1, B2 and other marks.
According to the standard, the proportional relationship between the width (represented by X) and the length (represented by Y) of paper is X: Y =1:N. ..
According to the basic area of paper format, the format specifications are divided into A series, B series and C series. The folio size of A0 is 841mm×1189mm, and the folio area is 1m2. B0 width is 1000mm× m2; The width dimension of C0 is 9 17mm× 1297mm, and the width area is1.2m2. ..
The format specification of copy paper only adopts A series and B series. If A0 paper is divided into two halves along the length direction, it becomes A 1 specification, while A 1 paper is divided along the length direction, it becomes A2 specification, so it is divided into A8 specification.
B0 paper is also divided into B8 standard according to this method. The format sizes of A0 ~ A8 and B0 ~ B8 are shown in the following table. Among them, A3, A4, A5, A6, B4, B5 and B6 are common specifications of copy paper.
Many countries use the international standard ISO 2 16 to define the paper size. This standard originated in Germany and was adopted in 1922. It defines three groups of paper sizes: A, B and C, including the well-known A4 paper size. Group C is mainly used for envelopes.
In addition, there are many nonstandard sizes in China, such as the business acceptance registration form used by China Mobile and other companies, the size is 190mm*265mm, so it is easy to make mistakes when the copier automatically selects paper.
References:
Baidu Encyclopedia -8 Kaizhi
Baidu encyclopedia-paper size