ICS35.040
National Standard of the People's Republic of China
GB12904—2003
Replaces GB129041998
Bar code for commodity
(ISO/IEC 15420:2000, Information technology--Automatic identification and data capture techniques-- Bar code symbologyspecification—EAN/UPC, NEQ)
Promulgated on 2003-01-17
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
Implementation on 2003-05-01
GB 12904—2003
Article 4.1, 4.2, 4.4.1.2 and Chapter 9 of this standard are mandatory, and the rest are recommended. Articles (1) and (5) of the Appendix are mandatory. The degree of consistency between this standard and the international standard ISO/IFC15420:2000 "Information Technology Automatic Identification and Data Collection Technology Bar Code Symbol Specification FAN/UPC" is non-equivalent. This standard is redrafted based on ISO/IEC15420:2000, with reference to "EAN·UCC General Specification" (2002 Edition), and combined with my country's actual situation to revise the national standard GB129041998 "Commodity Bar Code". This standard complies with the technical requirements of international standards and international specifications in terms of technical content, and also ensures the feasibility and practicality of application in my country.
This standard replaces GB129041998 "Commodity Bar Code". This standard is consistent with G31 Compared with 29041998, the main changes are as follows: the original standard was mandatory in its entirety, but this standard has changed it to mandatory for some clauses. The definitions of "product barcode" and "prefix code" in Chapter 3 of the original standard have been modified, and the terms and definitions of "prefix code", "product consumption unit", "standard product barcode", "shortened product barcode" and "reduction in original film width" have been deleted, and the terms and definitions of "product identification code", "product item", "EAN-13 product barcode", "EAN-8 product barcode", "UPC-A product barcode" and "UPC-F product barcode" have been added. ... The content of "Code structure of product barcode" in Chapter 4 of the original standard has been cancelled and replaced with "Product identification code", and the original content has been adjusted. Article 4.4 "Coding principles" has been added.
Article 5.1.9 of the original standard "Characters for human identification" adds the relevant technical requirements of ISO/IFC15420:2000. The structure is adjusted based on the content of Chapter 6 of the original standard, and Article 6.3 "Code system identifier" is added. The content of Chapter 7 of the original standard "Nominal size of commodity barcodes" is cancelled and replaced with "Symbol size and color matching". Article 7.1.2 of the original standard "Barcode character size" is supplemented, and the "barcode length" in Table 5 of the original standard is changed to "barcode symbol length", and the dimension markings of Figures 12 and 13 are modified accordingly, and Article 7.2 "Symbol color matching" and Article 7.3 "Symbol reading and printing" are added. -·- The content of Chapter 8 of the original standard "Technical requirements for commodity barcodes" is cancelled and replaced with " Symbol level". Move the contents of Article 8.2 "Barcode symbol consistency" and Article 8.3 "Space zone" of the original standard to Chapter 9, and move the main contents of Article 8.5.2.1 "Single item allowable deviation requirements" and Article 8.6 "Optical properties of barcode symbols" of the original standard to the newly added Appendix G "Technical requirements for quality control of product barcode printing process". Delete the other contents of Chapter 8 of the original standard, "·Cancel the content of the original Chapter 9 "Printing thickness of product barcodes" and replace it with "Symbol quality and judgment rules". Added Chapter 10 "Principles for the selection of symbols". Added Appendix I) "Code system identifier of product barcodes", Appendix E "Guide to the reading and printing of product barcodes", Appendix F "Reference decoding algorithm of product barcodes" and Appendix G "Technical requirements for quality control of product barcode printing process". Delete the appendix B and appendix C in the original standard, change the original standard appendix D \ EAN prefix code assigned to the coding organization \ to Appendix A \ EAN prefix code assigned by the barcode organization \ and update the content, change the original standard appendix E "UPC barcode" to Appendix C \ UPC product barcode ", and modify the content of Appendix (.
Appendix A, Appendix B, Appendix C, Appendix D, Appendix F of this standard are normative appendices, and Appendix E and Appendix ( are informative appendices. This standard is proposed and assigned by the China Article Numbering Center. According to the authorization of the administrative department of standardization of the State Council, this standard is organized and implemented by the China Article Numbering Center, and it is the maintenance organization of my country's product barcode.
GB 12904—2003
The contact information of China Article Numbering Center is as follows: Address: East Gate, No. 46, Dewaiyuzhongxili, Xicheng District, Beijing Postal Code: 100029
E-mail:
[email protected]Tel: (10) 62024556
Fax: (10) 62024523
Drafting organization of this standard: China Article Numbering Center Coding Center The main drafters of this standard are: Zhang Chenghai, Zhao Nan, Luo Qiuke, Huang Zexia. This standard was first issued in 1991, revised for the first time in 1998, and this is the second revision. 88
1 Scope
Commodity barcode
This standard specifies the encoding, structure, size, color, technical requirements and quality judgment rules of commodity barcodes. This standard applies to barcode identification of commodities. 2 Normative references
GB 12904-2003
The clauses in the following documents become the clauses of this standard through reference in this standard. For all the referenced documents with a date, all the subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties to the agreement based on this standard are encouraged to study whether to use the latest versions of these documents. For all the referenced documents without a date, the latest versions are applicable to this standard GB/T12508 Alphanumeric character set for optical recognition Part 2: (OCR-B character set Shape and size of printed image (GB/T 12508--1990, eqv ISO 1073-2:1976) GB/T12905 Bar code terminology
GB/T18348-2001 Inspection of the printing quality of commodity bar code symbols (IS0/IEC15416:2000, Information technology Automatic indentification and data capture techniques: Bar code print quality test specificationLinear symbols, NEQ)
ISO/IFC:646 Information technology ISO 7-bit coded character set for information exchange ISO/IEC15424 Information technology Automatic identification and data collection technology Data carrier identifier (including code system identifier) 3 Terms and definitions
The terms and definitions established in GB/T 12905 and the following terms and definitions apply to this standard. 3.1
Identification code for commodity A set of numbers specified by the International Article Numbering Association (EAN) and the Unified Code Council (UCC) for identifying commodities, including FAN/UCC-13, EAN/UCC-8 and UCC-12 codes. 3.2
Barcode for commodity Barcodes specified by the International Article Numbering Association (FAN) and the Uniform Code Council (UCC) to indicate commodity identification codes (3.1), including EAN commodity barcodes (EAN-13 commodity barcodes (3.2.1) and EAN-8 commodity barcodes (3.2.2)) and UPC commodity barcodes (UPC-A commodity barcodes (3.2.3) and UPC-E commodity barcodes (3.2.4)). Note: UPC is the abbreviation of Uniform Product Code. 3.2.1
EAN-13 commodity barcode EAN-13 barcode for commodity Standard version EAN commodity barcode
Commodity barcodes used to represent EAN/UCC-13 codes (3.2). 3.2.2
EAN-8 bar code for commodityEAN-8 bar code for commodity
Shortened EAN bar code for commodity
GB 12904--2003
Bar code for commodity representing EAN/UCC8 code (3.2)3.2.3
UPC-A bar code for commodityUPC-A bar code for commodityStandard UPC bar code for commodity
Bar code for commodity representing UCC-12 code (3.2).3.2.4
UPC-E bar code for commodity
UPC-E bar code for commodityShortened UPC bar code for commodity
Bar code for commodity representing UCC-12 code compressed according to certain rules (3.2).3.3
Icommodity item
Commodity item
A group of commodities divided according to their basic characteristics. 3.4
Prefix codeThe leftmost position numberThe leftmost digit in the EAN/UCC-13 code. 4
Product identification code
4. 1 EAN/UCC-13 code
EAN/UCC-13 code consists of 13 digits and is divided into three structures. The structures are as follows:Structure type
Structure one
Structure two
Structure blue
4.1.1 Prefix code
Guangshang identification code
XI: X12 XI Xi X, Xx X.
Xie Xi2 Xi. X1o X, XX, X.
X: X12 Xn X.. X, XX X. Xs
Product item code
X. X, X, X, X?
Check code
The prefix code consists of 2 to 3 digits (X13X12 or X1:X12Xn), which is the code assigned by EAN to the national (or regional) coding organization. The prefix code is uniformly assigned and managed by EAN, see Appendix A. The prefix code assigned by EAN to the China Article Numbering Center 1 consists of 3 digits (X:XXn).
4.1.2 Manufacturer identification code
The manufacturer identification code is assigned and managed by the China Article Numbering Center and consists of 7 to 9 digits. 4.1.3 Product item code
The product item code is compiled by the manufacturer and consists of 3 to 5 digits. 4.1.4 Check code
The check code is 1 digit. The calculation method of the check code is shown in Appendix B. 4.2EAN/UCC-8 Code
EAN/UCC-8 code consists of 8 digits, and its structure is as follows: Commodity Item Identification Code
XX XX. XX X2
Check Code
1) China Article Numbering Center is a specialized organization established with the approval of the State Council, responsible for the unified organization, coordination and management of bar code work in my country, and research and promotion of bar code technology. In 1991, the organization joined the International Article Numbering Association on behalf of my country. 90
4.2.1 Commodity Item Identification Code
Commodity Item Identification Code is allocated and managed by China Article Numbering Center, and consists of 7 digits. 4.2.2 Check Code
The check code is 1 digit, and the calculation method of the check code is shown in Appendix B. 4.3UCC-12 Code
The structure of UCC-12 code and its bar code symbol technical requirements and judgment rules are shown in Appendix C. 4.4 Coding principles
When compiling commodity identification codes, the following basic principles should be observed. 4.4.1 Principle of uniqueness
GB 12904-2003
4.4.1.1 The same commodity identification code should be assigned to commodities of the same commodity item. Commodities with similar basic characteristics are regarded as the same commodity item, and commodities with different basic characteristics are regarded as different commodity items. Note: The basic characteristics of commodities mainly include commodity name, trademark, type, specification, number, packaging type, etc. 4.4.1.2 Different commodity identification codes should be assigned to commodities of different commodity items. 4.4.2 Principle of meaninglessness
Each digit in the commodity identification code does not represent any specific information related to the commodity. 4.4.3 Principle of stability
Once a commodity identification code is assigned, it should remain unchanged if the basic characteristics of the commodity have not changed. 5 Symbol structure
5.1 Symbol structure of EAN-13 commodity barcode
EAN-13 commodity barcode consists of left blank area, start character, left data character, middle separator, right data character, check character, terminator, right blank area and characters for human identification. See Figures 1 and 2. Start character, data character on the left, separator in the middle, data character on the right, check character, terminator, blank area on the left
Preamble
1901234567892
Blank area on the right
Characters for human identification
Figure 1 Symbol structure of EAN-13 commodity barcode
113 module
95 module
Blank area on the left
Start character
Data character on the left
(indicates 6 digits)
Middle separator
Data character on the right
(indicates 5 digits)
Check character
(indicates 1 digit)
Figure 2 Schematic diagram of symbol structure of EAN-13 commodity barcode
Narrow area on the right
GB 12904—2003
5. 1. 1 Left blank area
The area with the same reflectivity as the blank area on the far left of the barcode symbol. The minimum width is 11 modules wide. 5.1.2 Start character
A special symbol located on the right side of the blank area on the left side of the barcode symbol, indicating the beginning of information, consisting of 3 modules. 5.1.3 Left data character
Located on the right side of the start character, a group of barcode characters indicating 6-digit information, consisting of 42 modules. 5.1.4 Middle separator
Located on the right side of the left data character, a special symbol that divides the barcode characters in half, consisting of 5 modules. 5.1.5 Right data character
Located on the right side of the middle separator, a group of barcode characters indicating 5-digit information, consisting of 35 modules. 5.1.6 Check character
Located on the right side of the right data character, a barcode character indicating the check code, consisting of 7 modules. 5.1.7 Termination symbol
A special symbol indicating the end of information on the right side of the check character of the bit gate barcode symbol, consisting of 3 modules. 5.1.8 Right blank area
An area with the same reflectivity as the blank area on the far right of the barcode symbol, with a minimum width of 7 modules. To protect the width of the right blank area, a "" symbol is added to the lower right corner of the barcode symbol. The position of the "" symbol is shown in Figure 3. Right edge of the terminator
Right blank area
16.19012341567892
The minimum width of the right end of “>” from the right edge of the terminator is 7 module widths
Figure 3 The position of “in the blank area on the right side of the EAN-13 commodity barcode symbol 5.1.9 Human-readable characters
Located below the barcode symbol, the 13-digit number corresponding to the barcode. Human-readable characters are preferably the ()CR-B character set specified in GB/T12508; the minimum distance between the top of the character and the bottom of the barcode character is 0.5 module width. The prefix code in the human-readable characters of the EAN-13 commodity barcode is printed on the left side of the start character of the barcode symbol. 5.2Symbol structure of the EAN-8 commodity barcode
The EAN-8 commodity barcode consists of a left blank area, a start character, a left data character, and a middle separator. , right data character, check character, terminator, right blank area and characters for human identification, see Figures 4 and 5. Left data character
Start character
Left blank area
Right data character
Middle separation character check character terminator
—Right blank area
9011234 characters for human identification
Figure 4 Symbol structure of EAN-8 commodity barcode|| tt||Empty area on the left
Start symbol
Data symbol on the left
(indicates 4 digits)
Middle separator
Module 81
Module 67
Data symbol on the left
(indicates 3 digits)
Check symbol
(indicates 1 digit)
Figure 5 Schematic diagram of the composition of EAN-8 commodity barcode symbol GB 12904—2003
Terminator
5.2.1The structure of the start character, middle separator, check character, and terminator of the EAN-8 product barcode. And the side blank area
5.2.2The minimum width of the left blank area and the right blank area of the EAN-8 product barcode is 7 modules wide. To protect the width of the left and right blank areas, a “<” symbol can be added to the lower left corner of the barcode symbol, and a “>” symbol can be added to the lower right corner of the barcode symbol. The positions of the “<” and “>” symbols are shown in Figure 6.
Left edge of the start symbol
Left blank area
The minimum width of the left end of “<” from the left edge of the start symbol
6901-2341
Right edge of the termination symbol
Right blank area
The minimum width of the right end of “<” from the right edge of the termination symbol
is 7 modules wide
Figure 6 The positions of “<” and “>” in the blank area of the EAN-8 commodity barcode symbol 5.2.3 The left data symbol represents 4-digit information and consists of 28 modules. 5.2.4 The right data symbol represents 3-digit information and consists of 21 modules. 5.2.5 Human-readable characters are 8-bit numbers corresponding to the barcode and are located below the barcode symbol. 6 Symbol representation
6.1 Binary representation of commodity barcode character set The commodity barcode character set includes subset A, subset B and subset C. Each barcode character consists of 2 "bars" and 2 "spaces". Each "bar" or "space" consists of 1 to 4 modules, and the total number of modules for each barcode character is 7. The module of "bar" is represented by binary "1", and the module of "space" is represented by binary "0", see Figure 7. The barcode character set can represent a total of 10 digital characters from 0 to 9. The binary representation of the commodity barcode character set is shown in Table 1 and Figure 8.
7 modules
7 modules
Figure 7 Barcode character composition
GB12904--2003
Digital character
Digital character
Table 1 Binary representation of commodity barcode character set A subset
0001101
0011001
0010011
0111101
0100011
0110001
0101111
0111011
0001011
Subset A (odd)
Subset B
0100111
o110011
0011011
0100001
0011101
0111001
0000101
0010001
0010111
Subset B (even)
Subset C (even)h
'The number of modules of the "bars" contained in the barcode characters in subset A is an odd number, which is called odd arrangement. The number of modules of the "bars" contained in the barcode characters in subsets B and C is an even number, which is called even arrangement. Figure 8 Schematic diagram of product barcode character set
6.2 Symbolic representation of EAN product barcode
6.2.1 Start character, end character
The binary representation of the start character and the end character is both "101", see Figure 9. Subset C
1110010
1100110
1101100
1000010
1011100
1010000
1000100
1001000
1110100
6.2.2 Middle separator
The binary representation of the middle separator is \01010", see Figure 9. Start character, end character
Middle separator
Figure 9 Schematic diagram of the start character, end character and middle separator of the product barcode 6.2.3 Number of EAN-13 product barcodes Data symbol and check symbol 6.2.3.1 The prefix is not included in the left data symbol and is not represented by bar code characters. 6.2.3.2 The left data symbol uses the A and B subsets for binary representation and depends on the value of the prefix, see Table 2. Example: Determine the binary representation of the left data symbol of an EAN/UCC-13 code 6901234567892. GB12904—2003
Step 1: According to Table 2, it can be found that the commodity bar code character set selected for the left data symbol with the prefix "6" is arranged in sequence as ABBBAA.
Step 2: According to Table 1, it can be found that the binary representation of the left data symbol "901234\" is shown in Table 3. Table 2 Selection rules of the left data symbol commodity bar code character set EAN-13 left data symbol commodity bar code character set Prefix code value
Left data symbol
Bar code character set
Binary representation
Code position number
Table 3 Binary representation of the left data symbol when the prefix code is \6”0
0001011
0100111
6.2. 3.3 The data symbol and check symbol on the right are represented by the C subset. 6.2.4 Data symbol and check symbol of EAN-8 product barcode 1
0110011
0011011
The data symbol on the left is represented by the A subset: The data symbol and check symbol on the right are represented by the C subset. 6.3 Code system identifier
The code system identifier of the product barcode is Em, see Appendix D. 7 Symbol size and color matching||tt| |7.1 Symbol size
7.1.1 Module size
When the magnification factor is 1.00, the module width of the product barcode is 0.330mm. 7.1.2 Barcode character size
o111101
0100011
When the magnification factor is 1.00, the size of each part of each character in the product barcode character set is shown in Figure 10. Among them, 1.2, 7, 8 barcodes 9.
GB12904—2003
The width of the space between the symbols should be adjusted appropriately to improve the reading performance of the barcode symbol by the reading equipment. The adjustment amount is 1/13 of the width of a module, see Table 4.
Unit: mm
A Subset
Left Data Symbol
B Subset
Right Data Symbol
C Subset
11 0. 685 *
Note: * indicates that the width of the space between barcode characters 1, 2, 7, and 8 has been appropriately adjusted. Barcode character size
Character value
7.1.3 Blank area width size
Table 4 Adjustment of the width of the space between barcode characters 1, 2, 7, and 8 A subset
GB12904--2003
Unit: mm
B subset or (subset
.0..2 5
When the magnification factor is 1.00, the minimum width of the left and right blank areas of the EAN-13 product barcode is 3.63mm and 2.31mm respectively, and the minimum width of the left and right blank areas of the EAN-8 product barcode is 2.31mm. 7.1.4 Size of the start character, middle separator, and end character When the magnification factor is 1.00, the size of the start character, middle separator, and end character of the EAN product barcode is shown in Figure 11. Unit: mm| |tt||Starting character
Terminator
Middle separator
3.300 to 1
4.620 to 1
3.300 and above
Right side
Dimensions of starting character, middle separator and terminator 11
7.1.5 Dimensions of characters for human identification
When the magnification factor is 1.00, the height of the characters for human identification is 2.75mm.7 .1.6 Symbol size of EAN-13 product barcode When the magnification factor is 1.00, the symbol size of EAN-13 product barcode is shown in Figure 12. 7.1.7 Symbol size of EAN-8 product barcode When the magnification factor is 1.00, the size of EAN-8 product barcode is shown in Figure 13. 7.1.8 Symbol size and magnification factor
The magnification factor of the product barcode is 0.80~2.00, and the barcode symbol is enlarged or reduced with the change of the magnification factor. Since the shortening of the bar height will affect the reading of the barcode symbol, the bar height should not be shortened at will. The module width corresponding to different magnification factors and the main dimensions of the EAN product barcode are shown in Table 5.2The minimum width of the left and right blank areas of the EAN-8 commodity barcode is 7 modules wide. To protect the width of the left and right blank areas, a "<" symbol can be added at the lower left corner of the barcode symbol and a ">" symbol can be added at the lower right corner of the barcode symbol. The positions of the "<" and "" symbols are shown in Figure 6.
Left edge of the start symbol
Left blank area
The minimum width of the left end of "<" from the left edge of the start symbol
6901-2341
Right edge of the termination symbol
Right blank area
》"The minimum width of the right end from the right edge of the termination symbol
is 7 modules wide
Figure 6The positions of "<" and "\\" in the blank area of the EAN-8 commodity barcode symbol 5.2.3The left data symbol represents 4-digit information and consists of 28 modules. 5.2.4 The data symbol on the right represents 3-digit information and is composed of 21 modules. 5.2.5 The human-readable character is an 8-digit number corresponding to the barcode and is located below the barcode symbol. 6 Symbol representation
6.1 Binary representation of the commodity barcode character set The commodity barcode character set includes subset A, subset B and subset C. Each barcode character consists of 2 "bars" and 2 "spaces". Each "bar" or "space" consists of 1 to 4 modules, and the total number of modules for each barcode character is 7. The module of the "bar" is represented by binary "1", and the module of the "space" is represented by binary "\0", see Figure 7. The barcode character set can represent a total of 10 digital characters from 0 to 9. The binary representation of the commodity barcode character set is shown in Table 1 and Figure 8.
7 modules
7 modules
Figure 7 Barcode character composition
GB12904--2003
Digital character
Digital character
Table 1 Binary representation of commodity barcode character set A subset
0001101
0011001
0010011
0111101
0100011
0110001
0101111
0111011
0001011
Subset A (odd)
Subset B
0100111
o110011
0011011
0100001
0011101
0111001
0000101
0010001
0010111
Subset B (even)
Subset C (even)h
'The number of modules of the "bars" contained in the barcode characters in subset A is an odd number, which is called odd arrangement. The number of modules of the "bars" contained in the barcode characters in subsets B and C is an even number, which is called even arrangement. Figure 8 Schematic diagram of product barcode character set
6.2 Symbolic representation of EAN product barcode
6.2.1 Start character, end character
The binary representation of the start character and the end character is both "101", see Figure 9. Subset C
1110010
1100110
1101100
1000010
1011100
1010000
1000100
1001000
1110100
6.2.2 Middle separator
The binary representation of the middle separator is \01010", see Figure 9. Start character, end character
Middle separator
Figure 9 Schematic diagram of the start character, end character and middle separator of the product barcode 6.2.3 Number of EAN-13 product barcodes Data symbol and check symbol 6.2.3.1 The prefix is not included in the left data symbol and is not represented by bar code characters. 6.2.3.2 The left data symbol uses the A and B subsets for binary representation and depends on the value of the prefix, see Table 2. Example: Determine the binary representation of the left data symbol of an EAN/UCC-13 code 6901234567892. GB12904—2003
Step 1: According to Table 2, it can be found that the commodity bar code character set selected for the left data symbol with the prefix "6" is arranged in sequence as ABBBAA.
Step 2: According to Table 1, it can be found that the binary representation of the left data symbol "901234\" is shown in Table 3. Table 2 Selection rules of the left data symbol commodity bar code character set EAN-13 left data symbol commodity bar code character set Prefix code value
Left data symbol
Bar code character set
Binary representation
Code position number
Table 3 Binary representation of the left data symbol when the prefix code is \6”0
0001011
0100111
6.2. 3.3 The data symbol and check symbol on the right are represented by the C subset. 6.2.4 Data symbol and check symbol of EAN-8 product barcode 1
0110011
0011011
The data symbol on the left is represented by the A subset: The data symbol and check symbol on the right are represented by the C subset. 6.3 Code system identifier
The code system identifier of the product barcode is Em, see Appendix D. 7 Symbol size and color matching||tt| |7.1 Symbol size
7.1.1 Module size
When the magnification factor is 1.00, the module width of the product barcode is 0.330mm. 7.1.2 Barcode character size
o111101
0100011
When the magnification factor is 1.00, the size of each part of each character in the product barcode character set is shown in Figure 10. Among them, 1.2, 7, 8 barcodes 9.
GB12904—2003
The width of the space between the symbols should be adjusted appropriately to improve the reading performance of the barcode symbol by the reading equipment. The adjustment amount is 1/13 of the width of a module, see Table 4.
Unit: mm
A Subset
Left Data Symbol
B Subset
Right Data Symbol
C Subset
11 0. 685 *
Note: * indicates that the width of the space between barcode characters 1, 2, 7, and 8 has been appropriately adjusted. Barcode character size
Character value
7.1.3 Blank area width size
Table 4 Adjustment of the width of the space between barcode characters 1, 2, 7, and 8 A subset
GB12904--2003
Unit: mm
B subset or (subset
.0..2 5
When the magnification factor is 1.00, the minimum width of the left and right blank areas of the EAN-13 product barcode is 3.63mm and 2.31mm respectively, and the minimum width of the left and right blank areas of the EAN-8 product barcode is 2.31mm. 7.1.4 Size of the start character, middle separator, and end character When the magnification factor is 1.00, the size of the start character, middle separator, and end character of the EAN product barcode is shown in Figure 11. Unit: mm| |tt||Starting character
Terminator
Middle separator
3.300 to 1
4.620 to 1
3.300 and above
Right side
Dimensions of starting character, middle separator and terminator 11
7.1.5 Dimensions of characters for human identification
When the magnification factor is 1.00, the height of the characters for human identification is 2.75mm.7 .1.6 Symbol size of EAN-13 product barcode When the magnification factor is 1.00, the symbol size of EAN-13 product barcode is shown in Figure 12. 7.1.7 Symbol size of EAN-8 product barcode When the magnification factor is 1.00, the size of EAN-8 product barcode is shown in Figure 13. 7.1.8 Symbol size and magnification factor
The magnification factor of the product barcode is 0.80~2.00, and the barcode symbol is enlarged or reduced with the change of the magnification factor. Since the shortening of the bar height will affect the reading of the barcode symbol, the bar height should not be shortened at will. The module width corresponding to different magnification factors and the main dimensions of the EAN product barcode are shown in Table 5.2The minimum width of the left and right blank areas of the EAN-8 commodity barcode is 7 modules wide. To protect the width of the left and right blank areas, a "<" symbol can be added at the lower left corner of the barcode symbol and a ">" symbol can be added at the lower right corner of the barcode symbol. The positions of the "<" and "" symbols are shown in Figure 6.
Left edge of the start symbol
Left blank area
The minimum width of the left end of "<" from the left edge of the start symbol
6901-2341
Right edge of the termination symbol
Right blank area
》"The minimum width of the right end from the right edge of the termination symbol
is 7 modules wide
Figure 6The positions of "<" and "\\" in the blank area of the EAN-8 commodity barcode symbol 5.2.3The left data symbol represents 4-digit information and consists of 28 modules. 5.2.4 The data symbol on the right represents 3-digit information and is composed of 21 modules. 5.2.5 The human-readable character is an 8-digit number corresponding to the barcode and is located below the barcode symbol. 6 Symbol representation
6.1 Binary representation of the commodity barcode character set The commodity barcode character set includes subset A, subset B and subset C. Each barcode character consists of 2 "bars" and 2 "spaces". Each "bar" or "space" consists of 1 to 4 modules, and the total number of modules for each barcode character is 7. The module of the "bar" is represented by binary "1", and the module of the "space" is represented by binary "\0", see Figure 7. The barcode character set can represent a total of 10 digital characters from 0 to 9. The binary representation of the commodity barcode character set is shown in Table 1 and Figure 8.
7 modules
7 modules
Figure 7 Barcode character composition
GB12904--2003
Digital character
Digital character
Table 1 Binary representation of commodity barcode character set A subset
0001101
0011001
0010011
0111101
0100011
0110001
0101111
0111011
0001011
Subset A (odd)
Subset B
0100111
o110011
0011011
0100001
0011101
0111001
0000101
0010001
0010111
Subset B (even)
Subset C (even)h
'The number of modules of the "bars" contained in the barcode characters in subset A is an odd number, which is called odd arrangement. The number of modules of the "bars" contained in the barcode characters in subsets B and C is an even number, which is called even arrangement. Figure 8 Schematic diagram of product barcode character set
6.2 Symbolic representation of EAN product barcode
6.2.1 Start character, end character
The binary representation of the start character and the end character is both "101", see Figure 9. Subset C
1110010
1100110
1101100
1000010
1011100
1010000
1000100
1001000
1110100
6.2.2 Middle separator
The binary representation of the middle separator is \01010", see Figure 9. Start character, end character
Middle separator
Figure 9 Schematic diagram of the start character, end character and middle separator of the product barcode 6.2.3 Number of EAN-13 product barcodes Data symbol and check symbol 6.2.3.1 The prefix is not included in the left data symbol and is not represented by bar code characters. 6.2.3.2 The left data symbol uses the A and B subsets for binary representation and depends on the value of the prefix, see Table 2. Example: Determine the binary representation of the left data symbol of an EAN/UCC-13 code 6901234567892. GB12904—2003
Step 1: According to Table 2, it can be found that the commodity bar code character set selected for the left data symbol with the prefix "6" is arranged in sequence as ABBBAA.
Step 2: According to Table 1, it can be found that the binary representation of the left data symbol "901234\" is shown in Table 3. Table 2 Selection rules of the left data symbol commodity bar code character set EAN-13 left data symbol commodity bar code character set Prefix code value
Left data symbol
Bar code character set
Binary representation
Code position number
Table 3 Binary representation of the left data symbol when the prefix code is \6”0
0001011
0100111
6.2. 3.3 The data symbol and check symbol on the right are represented by the C subset. 6.2.4 Data symbol and check symbol of EAN-8 product barcode 1
0110011
0011011
The data symbol on the left is represented by the A subset: The data symbol and check symbol on the right are represented by the C subset. 6.3 Code system identifier
The code system identifier of the product barcode is Em, see Appendix D. 7 Symbol size and color matching||tt| |7.1 Symbol size
7.1.1 Module size
When the magnification factor is 1.00, the module width of the product barcode is 0.330mm. 7.1.2 Barcode character size
o111101
0100011
When the magnification factor is 1.00, the size of each part of each character in the product barcode character set is shown in Figure 10. Among them, 1.2, 7, 8 barcodes 9.
GB12904—2003
The width of the space between the symbols should be adjusted appropriately to improve the reading performance of the barcode symbol by the reading equipment. The adjustment amount is 1/13 of the width of a module, see Table 4.
Unit: mm
A Subset
Left Data Symbol
B Subset
Right Data Symbol
C Subset
11 0. 685 *
Note: * indicates that the width of the space between barcode characters 1, 2, 7, and 8 has been appropriately adjusted. Barcode character size
Character value
7.1.3 Blank area width size
Table 4 Adjustment of the width of the space between barcode characters 1, 2, 7, and 8 A subset
GB12904--2003
Unit: mm
B subset or (subset
.0..2 5
When the magnification factor is 1.00, the minimum width of the left and right blank areas of the EAN-13 product barcode is 3.63mm and 2.31mm respectively, and the minimum width of the left and right blank areas of the EAN-8 product barcode is 2.31mm. 7.1.4 Size of the start character, middle separator, and end character When the magnification factor is 1.00, the size of the start character, middle separator, and end character of the EAN product barcode is shown in Figure 11. Unit: mm| |tt||Starting character
Terminator
Middle separator
3.300 to 1
4.620 to 1
3.300 and above
Right side
Dimensions of starting character, middle separator and terminator 11
7.1.5 Dimensions of characters for human identification
When the magnification factor is 1.00, the height of the characters for human identification is 2.75mm.7 .1.6 Symbol size of EAN-13 product barcode When the magnification factor is 1.00, the symbol size of EAN-13 product barcode is shown in Figure 12. 7.1.7 Symbol size of EAN-8 product barcode When the magnification factor is 1.00, the size of EAN-8 product barcode is shown in Figure 13. 7.1.8 Symbol size and magnification factor
The magnification factor of the product barcode is 0.80~2.00, and the barcode symbol is enlarged or reduced with the change of the magnification factor. Since the shortening of the bar height will affect the reading of the barcode symbol, the bar height should not be shortened at will. The module width corresponding to different magnification factors and the main dimensions of the EAN product barcode are shown in Table 5.00, the barcode symbol will be enlarged or reduced with the change of magnification factor. Since the bar height will affect the reading of the barcode symbol, the bar height should not be shortened at will. The module width corresponding to different magnification factors and the main dimensions of the EAN product barcode are shown in Table 5.00, the barcode symbol will be enlarged or reduced with the change of magnification factor. Since the bar height will affect the reading of the barcode symbol, the bar height should not be shortened at will. The module width corresponding to different magnification factors and the main dimensions of the EAN product barcode are shown in Table 5.3 The data symbol on the left represents 4-digit information, which is composed of 28 modules. 5.2.4 The data symbol on the right represents 3-digit information, which is composed of 21 modules. 5.2.5 The human-readable character is an 8-digit number corresponding to the barcode, which is located below the barcode symbol. 6 Symbol representation
6.1 Binary representation of the commodity barcode character set The commodity barcode character set includes subset A, subset B and subset C. Each barcode character consists of 2 "bars" and 2 "spaces". Each "bar" or "space" consists of 1 to 4 modules, and the total number of modules for each barcode character is 7. The module of the "bar" is represented by binary "1", and the module of the "space" is represented by binary "0", as shown in Figure 7. The barcode character set can represent a total of 10 digital characters from 0 to 9. The binary representation of the commodity barcode character set is shown in Table 1 and Figure 8.
7 modules
7 modules
Figure 7 Barcode character composition
GB12904--2003
Digital character
Digital character
Table 1 Binary representation of commodity barcode character set A subset
0001101
0011001
0010011
0111101
0100011
0110001
0101111
0111011
0001011
Subset A (odd)
Subset B
0100111
o110011
0011011
0100001
0011101
0111001
0000101
0010001
0010111
Subset B (even)
Subset C (even)h
'The number of modules of the "bars" contained in the barcode characters in subset A is an odd number, which is called odd arrangement. The number of modules of the "bars" contained in the barcode characters in subsets B and C is an even number, which is called even arrangement. Figure 8 Schematic diagram of product barcode character set
6.2 Symbolic representation of EAN product barcode
6.2.1 Start character, end character
The binary representation of the start character and the end character is both "101", see Figure 9. Subset C
1110010
1100110
1101100
1000010
1011100
1010000
1000100
1001000
1110100
6.2.2 Middle separator
The binary representation of the middle separator is \01010", see Figure 9. Start character, end character
Middle separator
Figure 9 Schematic diagram of the start character, end character and middle separator of the product barcode 6.2.3 Number of EAN-13 product barcodes Data symbol and check symbol 6.2.3.1 The prefix is not included in the left data symbol and is not represented by bar code characters. 6.2.3.2 The left data symbol uses the A and B subsets for binary representation and depends on the value of the prefix, see Table 2. Example: Determine the binary representation of the left data symbol of an EAN/UCC-13 code 6901234567892. GB12904—2003
Step 1: According to Table 2, it can be found that the commodity bar code character set selected for the left data symbol with the prefix "6" is arranged in sequence as ABBBAA.
Step 2: According to Table 1, it can be found that the binary representation of the left data symbol "901234\" is shown in Table 3. Table 2 Selection rules of the left data symbol commodity bar code character set EAN-13 left data symbol commodity bar code character set Prefix code value
Left data symbol
Bar code character set
Binary representation
Code position number
Table 3 Binary representation of the left data symbol when the prefix code is \6”0
0001011
0100111
6.2. 3.3 The data symbol and check symbol on the right are represented by the C subset. 6.2.4 Data symbol and check symbol of EAN-8 product barcode 1
0110011
0011011
The data symbol on the left is represented by the A subset: The data symbol and check symbol on the right are represented by the C subset. 6.3 Code system identifier
The code system identifier of the product barcode is Em, see Appendix D. 7 Symbol size and color matching||tt| |7.1 Symbol size
7.1.1 Module size
When the magnification factor is 1.00, the module width of the product barcode is 0.330mm. 7.1.2 Barcode character size
o111101
0100011
When the magnification factor is 1.00, the size of each part of each character in the product barcode character set is shown in Figure 10. Among them, 1.2, 7, 8 barcodes 9.
GB12904—2003
The width of the space between the symbols should be adjusted appropriately to improve the reading performance of the barcode symbol by the reading equipment. The adjustment amount is 1/13 of the width of a module, see Table 4.
Unit: mm
A Subset
Left Data Symbol
B Subset
Right Data Symbol
C Subset
11 0. 685 *
Note: * indicates that the width of the space between barcode characters 1, 2, 7, and 8 has been appropriately adjusted. Barcode character size
Character value
7.1.3 Blank area width size
Table 4 Adjustment of the width of the space between barcode characters 1, 2, 7, and 8 A subset
GB12904--2003
Unit: mm
B subset or (subset
.0..2 5
When the magnification factor is 1.00, the minimum width of the left and right blank areas of the EAN-13 product barcode is 3.63mm and 2.31mm respectively, and the minimum width of the left and right blank areas of the EAN-8 product barcode is 2.31mm. 7.1.4 Size of the start character, middle separator, and end character When the magnification factor is 1.00, the size of the start character, middle separator, and end character of the EAN product barcode is shown in Figure 11. Unit: mm| |tt||Starting character
Terminator
Middle separator
3.300 to 1
4.620 to 1
3.300 and above
Right side
Dimensions of starting character, middle separator and terminator 11
7.1.5 Dimensions of characters for human identification
When the magnification factor is 1.00, the height of the characters for human identification is 2.75mm.7 .1.6 Symbol size of EAN-13 product barcode When the magnification factor is 1.00, the symbol size of EAN-13 product barcode is shown in Figure 12. 7.1.7 Symbol size of EAN-8 product barcode When the magnification factor is 1.00, the size of EAN-8 product barcode is shown in Figure 13. 7.1.8 Symbol size and magnification factor
The magnification factor of the product barcode is 0.80~2.00, and the barcode symbol is enlarged or reduced with the change of the magnification factor. Since the shortening of the bar height will affect the reading of the barcode symbol, the bar height should not be shortened at will. The module width corresponding to different magnification factors and the main dimensions of the EAN product barcode are shown in Table 5.3 The data symbol on the left represents 4-digit information, which is composed of 28 modules. 5.2.4 The data symbol on the right represents 3-digit information, which is composed of 21 modules. 5.2.5 The human-readable character is an 8-digit number corresponding to the barcode, which is located below the barcode symbol. 6 Symbol representation
6.1 Binary representation of the commodity barcode character set The commodity barcode character set includes subset A, subset B and subset C. Each barcode character consists of 2 "bars" and 2 "spaces". Each "bar" or "space" consists of 1 to 4 modules, and the total number of modules for each barcode character is 7. The module of the "bar" is represented by binary "1", and the module of the "space" is represented by binary "0", as shown in Figure 7. The barcode character set can represent a total of 10 digital characters from 0 to 9. The binary representation of the commodity barcode character set is shown in Table 1 and Figure 8.
7 modules
7 modules
Figure 7 Barcode character composition
GB12904--2003
Digital character
Digital character
Table 1 Binary representation of commodity barcode character set A subset
0001101
0011001
0010011
0111101
0100011
0110001
0101111
0111011
0001011
Subset A (odd)
Subset B
0100111
o110011
0011011
0100001
0011101
0111001
0000101
0010001
0010111
Subset B (even)
Subset C (even)h
'The number of modules of the "bars" contained in the barcode characters in subset A is an odd number, which is called odd arrangement. The number of modules of the "bars" contained in the barcode characters in subsets B and C is an even number, which is called even arrangement. Figure 8 Schematic diagram of product barcode character set
6.2 Symbolic representation of EAN product barcode
6.2.1 Start character, end character
The binary representation of the start character and the end character is both "101", see Figure 9. Subset C
1110010
1100110
1101100
1000010
1011100
1010000
1000100
1001000
1110100
6.2.2 Middle separator
The binary representation of the middle separator is \01010", see Figure 9. Start character, end character
Middle separator
Figure 9 Schematic diagram of the start character, end character and middle separator of the product barcode 6.2.3 Number of EAN-13 product barcodes Data symbol and check symbol 6.2.3.1 The prefix is not included in the left data symbol and is not represented by bar code characters. 6.2.3.2 The left data symbol uses the A and B subsets for binary representation and depends on the value of the prefix, see Table 2. Example: Determine the binary representation of the left data symbol of an EAN/UCC-13 code 6901234567892. GB12904—2003
Step 1: According to Table 2, it can be found that the commodity bar code character set selected for the left data symbol with the prefix "6" is arranged in sequence as ABBBAA.
Step 2: According to Table 1, it can be found that the binary representation of the left data symbol "901234\" is shown in Table 3. Table 2 Selection rules of the left data symbol commodity bar code character set EAN-13 left data symbol commodity bar code character set Prefix code value
Left data symbol
Bar code character set
Binary representation
Code position number
Table 3 Binary representation of the left data symbol when the prefix code is \6”0
0001011
0100111
6.2. 3.3 The data symbol and check symbol on the right are represented by the C subset. 6.2.4 Data symbol and check symbol of EAN-8 product barcode 1
0110011
0011011
The data symbol on the left is represented by the A subset: The data symbol and check symbol on the right are represented by the C subset. 6.3 Code system identifier
The code system identifier of the product barcode is Em, see Appendix D. 7 Symbol size and color matching||tt| |7.1 Symbol size
7.1.1 Module size
When the magnification factor is 1.00, the module width of the product barcode is 0.330mm. 7.1.2 Barcode character size
o111101
0100011
When the magnification factor is 1.00, the size of each part of each character in the product barcode character set is shown in Figure 10. Among them, 1.2, 7, 8 barcodes 9.
GB12904—2003
The width of the space between the symbols should be adjusted appropriately to improve the reading performance of the barcode symbol by the reading equipment. The adjustment amount is 1/13 of the width of a module, see Table 4.
Unit: mm
A Subset
Left Data Symbol
B Subset
Right Data Symbol
C Subset
11 0. 685 *
Note: * indicates that the width of the space between barcode characters 1, 2, 7, and 8 has been appropriately adjusted. Barcode character size
Character value
7.1.3 Blank area width size
Table 4 Adjustment of the width of the space between barcode characters 1, 2, 7, and 8 A subset
GB12904--2003
Unit: mm
B subset or (subset
.0..2 5
When the magnification factor is 1.00, the minimum width of the left and right blank areas of the EAN-13 product barcode is 3.63mm and 2.31mm respectively, and the minimum width of the left and right blank areas of the EAN-8 product barcode is 2.31mm. 7.1.4 Size of the start character, middle separator, and end character When the magnification factor is 1.00, the size of the start character, middle separator, and end character of the EAN product barcode is shown in Figure 11. Unit: mm| |tt||Starting character
Terminator
Middle separator
3.300 to 1
4.620 to 1
3.300 and above
Right side
Dimensions of starting character, middle separator and terminator 11
7.1.5 Dimensions of characters for human identification
When the magnification factor is 1.00, the height of the characters for human identification is 2.75mm.7 .1.6 Symbol size of EAN-13 product barcode When the magnification factor is 1.00, the symbol size of EAN-13 product barcode is shown in Figure 12. 7.1.7 Symbol size of EAN-8 product barcode When the magnification factor is 1.00, the size of EAN-8 product barcode is shown in Figure 13. 7.1.8 Symbol size and magnification factor
The magnification factor of the product barcode is 0.80~2.00, and the barcode symbol is enlarged or reduced with the change of the magnification factor. Since the shortening of the bar height will affect the reading of the barcode symbol, the bar height should not be shortened at will. The module width corresponding to different magnification factors and the main dimensions of the EAN product barcode are shown in Table 5.1 Binary representation of commodity barcode character set The commodity barcode character set includes subset A, subset B and subset C. Each barcode character consists of 2 "bars" and 2 "spaces". Each "bar" or "space" consists of 1 to 4 modules, and the total number of modules for each barcode character is 7. The module of "bar" is represented by binary "1", and the module of "space" is represented by binary "0", as shown in Figure 7. The barcode character set can represent a total of 10 digital characters from 0 to 9. The binary representation of the commodity barcode character set is shown in Table 1 and Figure 8.
7 modules
7 modules
Figure 7 Barcode character composition
GB12904--2003
Digital character
Digital character
Table 1 Binary representation of commodity barcode character set A subset
0001101
0011001
0010011
0111101
0100011
0110001
bZxz.net0101111
0111011
0001011
Subset A (odd)
Subset B
0100111
o110011
0011011
0100001
0011101
0111001
0000101
0010001
0010111
Subset B (even)
Subset C (even)h
'The number of modules of the "bars" contained in the barcode characters in subset A is an odd number, which is called odd arrangement. The number of modules of the "bars" contained in the barcode characters in subsets B and C is an even number, which is called even arrangement. Figure 8 Schematic diagram of product barcode character set
6.2 Symbolic representation of EAN product barcode
6.2.1 Start character, end character
The binary representation of the start character and the end character is both "101", see Figure 9. Subset C
1110010
1100110
1101100
1000010
1011100
1010000
1000100
1001000
1110100
6.2.2 Middle separator
The binary representation of the middle separator is \01010", see Figure 9. Start character, end character
Middle separator
Figure 9 Schematic diagram of the start character, end character and middle separator of the product barcode 6.2.3 Number of EAN-13 product barcodes Data symbol and check symbol 6.2.3.1 The prefix is not included in the left data symbol and is not represented by bar code characters. 6.2.3.2 The left data symbol uses the A and B subsets for binary representation and depends on the value of the prefix, see Table 2. Example: Determine the binary representation of the left data symbol of an EAN/UCC-13 code 6901234567892. GB12904—2003
Step 1: According to Table 2, it can be found that the commodity bar code character set selected for the left data symbol with the prefix "6" is arranged in sequence as ABBBAA.
Step 2: According to Table 1, it can be found that the binary representation of the left data symbol "901234\" is shown in Table 3. Table 2 Selection rules of the left data symbol commodity bar code character set EAN-13 left data symbol commodity bar code character set Prefix code value
Left data symbol
Bar code character set
Binary representation
Code position number
Table 3 Binary representation of the left data symbol when the prefix code is \6”0
0001011
0100111
6.2. 3.3 The data symbol and check symbol on the right are represented by the C subset. 6.2.4 Data symbol and check symbol of EAN-8 product barcode 1
0110011
0011011
The data symbol on the left is represented by the A subset: The data symbol and check symbol on the right are represented by the C subset. 6.3 Code system identifier
The code system identifier of the product barcode is Em, see Appendix D. 7 Symbol size and color matching||tt| |7.1 Symbol size
7.1.1 Module size
When the magnification factor is 1.00, the module width of the product barcode is 0.330mm. 7.1.2 Barcode character size
o111101
0100011
When the magnification factor is 1.00, the size of each part of each character in the product barcode character set is shown in Figure 10. Among them, 1.2, 7, 8 barcodes 9.
GB12904—2003
The width of the space between the symbols should be adjusted appropriately to improve the reading performance of the barcode symbol by the reading equipment. The adjustment amount is 1/13 of the width of a module, see Table 4.
Unit: mm
A Subset
Left Data Symbol
B Subset
Right Data Symbol
C Subset
11 0. 685 *
Note: * indicates that the width of the space between barcode characters 1, 2, 7, and 8 has been appropriately adjusted. Barcode character size
Character value
7.1.3 Blank area width size
Table 4 Adjustment of the width of the space between barcode characters 1, 2, 7, and 8 A subset
GB12904--2003
Unit: mm
B subset or (subset
.0..2 5
When the magnification factor is 1.00, the minimum width of the left and right blank areas of the EAN-13 product barcode is 3.63mm and 2.31mm respectively, and the minimum width of the left and right blank areas of the EAN-8 product barcode is 2.31mm. 7.1.4 Size of the start character, middle separator, and end character When the magnification factor is 1.00, the size of the start character, middle separator, and end character of the EAN product barcode is shown in Figure 11. Unit: mm| |tt||Starting character
Terminator
Middle separator
3.300 to 1
4.620 to 1
3.300 and above
Right side
Dimensions of starting character, middle separator and terminator 11
7.1.5 Dimensions of characters for human identification
When the magnification factor is 1.00, the height of the characters for human identification is 2.75mm.7 .1.6 Symbol size of EAN-13 product barcode When the magnification factor is 1.00, the symbol size of EAN-13 product barcode is shown in Figure 12. 7.1.7 Symbol size of EAN-8 product barcode When the magnification factor is 1.00, the size of EAN-8 product barcode is shown in Figure 13. 7.1.8 Symbol size and magnification factor
The magnification factor of the product barcode is 0.80~2.00, and the barcode symbol is enlarged or reduced with the change of the magnification factor. Since the shortening of the bar height will affect the reading of the barcode symbol, the bar height should not be shortened at will. The module width corresponding to different magnification factors and the main dimensions of the EAN product barcode are shown in Table 5.1 Binary representation of commodity barcode character set The commodity barcode character set includes subset A, subset B and subset C. Each barcode character consists of 2 "bars" and 2 "spaces". Each "bar" or "space" consists of 1 to 4 modules, and the total number of modules for each barcode character is 7. The module of "bar" is represented by binary "1", and the module of "space" is represented by binary "0", as shown in Figure 7. The barcode character set can represent a total of 10 digital characters from 0 to 9. The binary representation of the commodity barcode character set is shown in Table 1 and Figure 8.
7 modules
7 modules
Figure 7 Barcode character composition
GB12904--2003
Digital character
Digital character
Table 1 Binary representation of commodity barcode character set A subset
0001101
0011001
0010011
0111101
0100011
0110001
0101111
0111011
0001011
Subset A (odd)
Subset B
0100111
o110011
0011011
0100001
0011101
0111001
0000101
0010001
0010111
Subset B (even)
Subset C (even)h
'The number of modules of the "bars" contained in the barcode characters in subset A is an odd number, which is called odd arrangement. The number of modules of the "bars" contained in the barcode characters in subsets B and C is an even number, which is called even arrangement. Figure 8 Schematic diagram of product barcode character set
6.2 Symbolic representation of EAN product barcode
6.2.1 Start character, end character
The binary representation of the start character and the end character is both "101", see Figure 9. Subset C
1110010
1100110
1101100
1000010
1011100
1010000
1000100
1001000
1110100
6.2.2 Middle separator
The binary representation of the middle separator is \01010", see Figure 9. Start character, end character
Middle separator
Figure 9 Schematic diagram of the start character, end character and middle separator of the product barcode 6.2.3 Number of EAN-13 product barcodes Data symbol and check symbol 6.2.3.1 The prefix is not included in the left data symbol and is not represented by bar code characters. 6.2.3.2 The left data symbol uses the A and B subsets for binary representation and depends on the value of the prefix, see Table 2. Example: Determine the binary representation of the left data symbol of an EAN/UCC-13 code 6901234567892. GB12904—2003
Step 1: According to Table 2, it can be found that the commodity bar code character set selected for the left data symbol with the prefix "6" is arranged in sequence as ABBBAA.
Step 2: According to Table 1, it can be found that the binary representation of the left data symbol "901234\" is shown in Table 3. Table 2 Selection rules of the left data symbol commodity bar code character set EAN-13 left data symbol commodity bar code character set Prefix code value
Left data symbol
Bar code character set
Binary representation
Code position number
Table 3 Binary representation of the left data symbol when the prefix code is \6”0
0001011
0100111
6.2. 3.3 The data symbol and check symbol on the right are represented by the C subset. 6.2.4 Data symbol and check symbol of EAN-8 product barcode 1
0110011
0011011
The data symbol on the left is represented by the A subset: The data symbol and check symbol on the right are represented by the C subset. 6.3 Code system identifier
The code system identifier of the product barcode is Em, see Appendix D. 7 Symbol size and color matching||tt| |7.1 Symbol size
7.1.1 Module size
When the magnification factor is 1.00, the module width of the product barcode is 0.330mm. 7.1.2 Barcode character size
o111101
0100011
When the magnification factor is 1.00, the size of each part of each character in the product barcode character set is shown in Figure 10. Among them, 1.2, 7, 8 barcodes 9.
GB12904—2003
The width of the space between the symbols should be adjusted appropriately to improve the reading performance of the barcode symbol by the reading equipment. The adjustment amount is 1/13 of the width of a module, see Table 4.
Unit: mm
A Subset
Left Data Symbol
B Subset
Right Data Symbol
C Subset
11 0. 685 *
Note: * indicates that the width of the space between barcode characters 1, 2, 7, and 8 has been appropriately adjusted. Barcode character size
Character value
7.1.3 Blank area width size
Table 4 Adjustment of the width of the space between barcode characters 1, 2, 7, and 8 A subset
GB12904--2003
Unit: mm
B subset or (subset
.0..2 5
When the magnification factor is 1.00, the minimum width of the left and right blank areas of the EAN-13 product barcode is 3.63mm and 2.31mm respectively, and the minimum width of the left and right blank areas of the EAN-8 product barcode is 2.31mm. 7.1.4 Size of the start character, middle separator, and end character When the magnification factor is 1.00, the size of the start character, middle separator, and end character of the EAN product barcode is shown in Figure 11. Unit: mm| |tt||Starting character
Terminator
Middle separator
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