This standard specifies the structure, three sets of barcode character sets, barcode symbol size, quality assurance and printing position of trade order 128 barcode (hereinafter referred to as 128 barcode). This standard is applicable to the identification of various data information. GB/T 15425-1994 Trade order 128 barcode GB/T15425-1994 Standard download decompression password: www.bzxz.net
This standard specifies the structure, three sets of barcode character sets, barcode symbol size, quality assurance and printing position of trade order 128 barcode (hereinafter referred to as 128 barcode). This standard is applicable to the identification of various data information.

National Standard of the People's Republic of China
Bar code 128 for trade unit
This standard is equivalent to EAN/UCC-128.
1 Subject content and scope of application
GB/T15425-94
This standard specifies the structure, three sets of bar code character sets, bar code symbol size, quality assurance and printing position of the bar code 128 for trade unit (hereinafter referred to as 128 bar code).
This standard is applicable to the identification of various data information. 2 Reference standards
GB12905 Bar code system general terminology Bar code symbol terminology GB12904 General commodity bar code
3128 bar code structure
128 bar code is a variable length continuous bar code (see Figure 1). It is represented by a set of parallel bars, spaces and their corresponding characters. It consists of a start symbol, data symbol, check symbol, terminator, and left and right blank areas. Each barcode character consists of 11 modules, including three bars and three spaces. Each bar and space consists of 1 to 4 modules. 128902x341
Figure 1128 barcode symbol
3.1 Start symbol
Marks the beginning of the 128 barcode symbol and consists of two barcode characters. 3.2 Data symbol
Marks certain data information. Each data symbol consists of 11 modules, including three bars and three spaces. As shown in Figure 2. Number of modules
Figure 2128 barcode data symbol module composition
Approved by the State Administration of Technical Supervision on December 28, 1994, and implemented on August 1, 1995
3.3 Check symbol
GB/T 15425-94
Used to check the correctness of the 128 barcode. The barcode character structure is the same as the data symbol. The value of the check symbol is calculated by taking the modulus 103 according to a certain calculation method based on the value of the start symbol and the data symbol. The calculation method of the check symbol value is shown in Appendix A.
3.4 ​​Termination symbol
Marks the end of the 128 barcode symbol and consists of 13 modules. There are four bars and three spaces. As shown in Figure 3. Number of modules
9 10 11 12 13
Figure 3128 The barcode terminator consists of 13 modules 3.5 Left and right blank areas
The left and right blank areas consist of ten modules respectively. 4128 barcode character set
4.1128 barcode has three character sets, A and BC, covering all 128 ASCI code characters, see Table 1.4.2 Auxiliary characters
128 barcode has twelve auxiliary characters:
START A CODE A SHIFT FNC2
START B CODE B STOP FNC3
START C CODE C FNC1 FNC4
4.2.1 Start character STARTA, STARTB, STARTC Start character A (or B, or C) and function character 1 form the start symbol of 128 barcode4.2.2 Function character 1 (FNC1)
and start character A (or B, or C) form the start symbol of 128 barcode. It can also be used as a check character. 4.2.3 Switching characters CODEA, CODEB, CODEC are used in 128 barcode symbols to indicate the change of barcode character set. 4.2.4 Conversion character SHIFT
is used in 128 barcode symbols to indicate the change of barcode character set A and B. This change is limited to the character after SHIFT. 4.2.5 Termination character STOP
See 3.4.
4.3 Barcode character set A
includes: numbers 0~9,
capital letters A~Z;
control characters (control characters are character values ​​64~~95); special characters and auxiliary characters.
4.4 Barcode character set B
Includes: numbers 0~9;
Capital letters A~Z;
Lowercase letters a~z;
GB/T 15425--94
Special characters and auxiliary characters.
4.5 Barcode character set C
Includes: numbers 00~~~99;
Auxiliary characters.
4.6 Selection of barcode character set
4.6.1 Character set C is selected for data whose first four characters are numeric characters4.6.2 Character set A is selected for data whose control characters appear before lowercase English letters4.6.3 Character set B is selected except for the above cases4.7 Transformation of barcode character set
4.7.1128 barcode symbols can be represented by multiple character sets at the same time-a string of data, and the barcode character set in a barcode symbol can be transformed4.7.2 The start symbol in the start symbol determines the character set selected at the beginning of the barcode symbol. When the character set needs to be changed, insert a switch symbol or a conversion symbol prompt to change to the required barcode character set. 5 Characters for human recognition
5.1 Characters for human recognition are printed below the bar and space graphics. A part is usually not printed.
5.2 The size of the 6128 bar code symbol where the check character and auxiliary characters in the data are not data
6.1 Module width size
The module width size is 1.0mm.
6.2128 barcode symbol is a variable length barcode, and its symbol length includes: start character: 11 modules
function character: 11 modules
check character: 11 moduleswwW.bzxz.Net
terminator: 13 modules
data character: N×11 modules
left and right blank areas are 10 modules respectively128 barcode length calculation formula:
W=（66+11N）module×1.0mm
Table 1128 barcode character set
Character graphics (module) 1)
Character set
Character set
Character value
GB/T 15425—94
Continued Table 1
Character graphics (module) 1)
Character set
Character nest
Character set
Character value
GB/T 15425—94
Continued Table 1
Character graphics (module) 1)
Character set
Character nest
Character set
Character value
15425—94
Continued Table 1
Character graphics (module)
Character set
Character set
Character value
CODE C
STARTA
START B
START C
Note: 1) B is a bar, S is a space.
Wherein: N is the number of data symbols including auxiliary characters. 306
6.3128 barcode bar height
The bar height is 31.8mm.
6.4128 barcode symbol magnification factor
GB/T 15425-94
6.4.1128 barcode symbol magnification factor is 0.25~~1.20. 6.4.2128 barcode symbol magnification factor selection When used with universal commodity barcode, the module width of the commonly used 128 barcode is not less than 75% of the narrowest bar width of the universal commodity barcode, and the minimum height of the 128 barcode is 20mm. 7 Quality Assurance
7.1 Barcode Dimension Accuracy
7.1.1 Barcode Character Size
128 Barcode character size See Figure 4 (128 barcode character size). 7.1.2 Barcode Size Printing Error
128 Barcode size printing allowable error See Table 2 (128 barcode size error). Ds
Figure 4128 Barcode Character Size Representation
D The size of a bar (or space); D, the size of a bar and its adjacent space; D7.2 Color Contrast
Barcode color contrast should meet the PCS value of not less than 75%. 8 Barcode Printing Position
The size of a barcode character
8.1 Usually the 128 barcode is printed on the right side of the universal commodity barcode of the trade unit, as close to the universal commodity barcode as possible while meeting the requirements of the blank area.
8.2 If the above requirements cannot be met, it should be printed as clearly as possible in a position associated with the general product barcode. Table 2128 Barcode Dimension Accuracy
Magnification Factor
±0.0201)
Magnification Factor
1, 20
Note: 1) The bar width shall not be less than 0.23mm.
15425-94
Continued Table 2
GB/T 15425—94
Appendix A
128 Barcode Verification Character Value Calculation Method
(Supplement)
A1128 Barcode Verification Character Value Calculation Steps are as follows:Step 1
Barcode Character Value
Barcode Character Value Refer to Table 1.
Step 2
Barcode Character Value Multiplied by the Corresponding Weight
The Weight Distribution is as follows:
Beginning Symbol
First Character
Second Character
Third Character
The ㎡th Character
Starting Character
Function Character 1
Note: The ㎡th Character is the last character before the verification character. Step 3 Sum
Sum the results obtained in step 2.
Step 4
Step 5
Divide by modulus 103
Divide the result obtained in step 3 by 103.
Take the remainder
Take the remainder obtained in step 4 as the value of the check character. Step 6 Find the check character
Based on the value of the check character obtained in step 5, find the check character from the bar code character set (Table 1). If the remainder is 102, the check character is function character 1.
Example 1. Calculation of the checksum value of the start character C, function character 1, 128812; a.
Barcode character value
The value of the character in the table 1 is as follows:
Start character C
Function character 1
The first character is 12
The second character is 88
The third character is 12
The value of the character is multiplied by the corresponding weight
The value of the character
Divided by the modulus 103
543-103=5 remainder 28
The value of the checksum is 28
GB/T 15425
5—94
The value of the character is weight
105 ×1 =105
102 X1 =102
12 ×224
88 ×3 =264
12×4= 48
Example 2. Calculation of the checksum value of the start character C and the function character 1128902×341: a. Character value
Look up Table 1:
Start character C
Function character 1
Character value multiplied by the corresponding weight
Character value weight
—153
Character value
divided by the modulus 103
1788—10317 remainder 37
The checksum value is 37.
Example 3. Start character A Function character 1
Character value
Table 1:
15425—94
Calculation of the check character value of URZ3+:
Start character A
Function character 1
Character value multiplied by the corresponding weight
divided by the modulus 103
854103-8·remainder 30
The check character value is 30.
Additional notes:
This standard is proposed by China Article Coding Center. The value weight product of the character
103 X1 -103
102 X1=102
53 X2 =106
50 X3 =150
58 X4 232
19×5=95
11 ×6 =66
This standard is drafted by China Article Coding Center. The main drafters of this standard are Hu Jiazhang, Xi Junwu, Guo Weihua and Wen Xiangyang. The value of the character
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