This standard replaces GB 12904-2003 "Commodity Barcode". This standard specifies the coding, barcode representation, technical requirements and quality judgment rules of retail commodities. This standard applies to barcode identification of retail commodities. Compared with GB 12904-2003, the main changes of this standard are as follows: - Modify the definition of "commodity barcode" in Chapter 3 of the original standard, delete the terms and definitions of "commodity identification code", "commodity item", "EAN-13 commodity barcode", "EAN-8 commodity barcode", "UPC-A commodity barcode", "UPC-E commodity barcode" and "prefix code", and add the terms and definitions of "retail commodity", "retail commodity code", "magnification factor" and "prefix code". - Change "commodity identification code" in Chapter 4 of the original standard to "coding", adjust the original content, and add Article 4.3 "Code compilation". - Merge Chapters 5 and 6 of the original standard into Chapter 5 "Barcode representation", and adjust the original content. ———Changing Chapter 7 “Symbol Size and Color Matching” of the original standard to Chapter 6 “Barcode Symbol Design”. Adjusting the content of barcode color matching in the original content to F.3 in Appendix F. ———Merging the contents of Chapter 8 “Symbol Grade” and Chapter 9 “Symbol Quality and Judgment Rules” of the original standard to Chapter 9 “Evaluation and Requirements of Barcode Symbol Quality”. Merging the contents of Article 8.1 “Symbol Quality Parameters and Classification” and Article 9.1 “Symbol Quality” of the original standard to Article 9.1 “Barcode Symbol Quality Requirements”. ———Changing Chapter 10 “Principles for the Selection of Symbols” of the original standard to Chapter 7 “Barcode Symbol Selection” and making it a mandatory clause. ———Adding Chapter 8 “Placement of Barcode Symbols”. ———Updated the content of Appendix A of the original standard and changed it to “Prefix Codes Allocated to National (Regional) Coding Organizations by GS1”. ———Canceling the content of Appendix C “UPC Product Barcode” of the original standard and changing it to “12-digit Code and Barcode Representation”. Adjusting the original content. ———Retain the original standard Appendix D "Code system identifier of commodity barcode" and change it to Appendix D "Code system identifier of EAN/UPC barcode". ———Delete the content of the original standard Appendix E "Guide to reading and printing commodity barcodes". ———Change the original standard Appendix F "Reference decoding algorithm of commodity barcode" to Appendix E and change it to "Reference decoding algorithm of EAN/UPC barcode". ———Change the content of the original standard Appendix G "Quality control technical requirements for commodity barcode printing process" to Appendix F and change it to "Quality control technical requirements for EAN/UPC barcode printing process". GB 12904-2008 Commodity barcode Retail commodity coding and barcode representation GB12904-2008 standard download decompression password: www.bzxz.net
This standard replaces GB 12904-2003 "Commodity barcode". This standard specifies the coding, barcode representation, technical requirements and quality judgment rules of barcodes for retail commodities. This standard applies to the barcode identification of retail goods. Compared with GB 12904-2003, the main changes of this standard are as follows: ——The definition of "commodity barcode" in Chapter 3 of the original standard has been modified, and the terms and definitions of "commodity identification code", "commodity item", "EAN-13 commodity barcode", "EAN-8 commodity barcode", "UPC-A commodity barcode", "UPC-E commodity barcode" and "prefix code" have been deleted, and the terms and definitions of "retail commodity", "retail commodity code", "magnification factor" and "prefix code" have been added. ———Changing "commodity identification code" in Chapter 4 of the original standard to "encoding", adjusting the original content, and adding Article 4.3 "code compilation". ———Merging Chapters 5 and 6 of the original standard into Chapter 5 "barcode representation", and adjusting the original content. ———Changing Chapter 7 "symbol size and color matching" in the original standard into Chapter 6 "barcode symbol design". Adjust the content of barcode color matching in the original content to F.3 in Appendix F. ———Merge the contents of Chapter 8 "Symbol Grade" and Chapter 9 "Symbol Quality and Judgment Rules" of the original standard and change them to Chapter 9 "Evaluation and Requirements of Barcode Symbol Quality". Merge the contents of Article 8.1 "Quality Parameters and Grading of Symbols" and Article 9.1 "Symbol Quality" of the original standard into Article 9.1 "Barcode Symbol Quality Requirements". ———Chapter 10 "Principles for Selection of Symbols" of the original standard is changed to Chapter 7 "Selection of Barcode Symbols" and made it a mandatory clause. ———Add Chapter 8 "Placement of Barcode Symbols". ———Update the content of Appendix A of the original standard and change it to "Prefix Codes Allocated to National (Regional) Coding Organizations by GS1". ———Cancel the content of Appendix C "UPC Product Barcode" of the original standard and change it to "12-digit Code and Barcode Representation". Adjust the original content. ———Retain the original standard Appendix D "Code System Identifier of Commodity Barcode" and change it to Appendix D "Code System Identifier of EAN/UPC Barcode". ———Delete the content of the original standard Appendix E "Guide to Reading and Printing Commodity Barcode". ———Change the original standard Appendix F "Reference Decoding Algorithm of Commodity Barcode" to Appendix E and change it to "Reference Decoding Algorithm of EAN/UPC Barcode". ———Change the content of the original standard Appendix G "Technical Requirements for Quality Control of Commodity Barcode Printing Process" to Appendix F and change it to "Technical Requirements for Quality Control of EAN/UPC Barcode Printing Process".

The clauses in the following documents become the clauses of this standard through reference in this standard. For all dated referenced documents, all subsequent amendments (excluding errata) or revisions are not applicable to this standard. However, the parties who reach an agreement based on this standard are encouraged to study whether the latest versions of these documents can be used. For all undated referenced documents, the latest versions shall apply to this standard.
GB/T1988 Information technology - Seven-bit coded character set for information interchange (GB/T1988-1998, ｅｑｖISO/IEC646:1991)
GB/T12508 Alphanumeric character set for optical recognition - Part 2: Shape and size of printed images of the OCR-B character set
(GB/T12508-1990, ｅｑｖISO1073-2:1976)
GB/T12905 Bar code terminology
GB/T14257 Position of product bar code symbols
GB/T18283 Product bar codes - In-store bar codes
GB/T18348 Product bar codes - Inspection of bar code symbol printing quality
ISO/IEC15420 Information technology Automatic identification and data capture technology Bar code symbol specification EAN/UPC
ISO/IEC15424 Information technology Automatic identification and data capture technology Data carrier identifiers (including code system identifiers)
Foreword III
1 Scope 1
2 Normative references 1
3 Terms and definitions 1
4 Coding 2
4.1 Code structure 2
4.2 Code compilation principles 2
4.3 Code compilation 3
5 Bar code representation 3
5.1 Code system 3
5.2 EAN/UPC Bar code symbol structure 3
5.3 EAN/UPC Binary representation of barcodes 5
6 Barcode symbol design 8
6.1 Size 8
6.2 Color matching of barcode symbols 11
7 Selection of barcode symbols １１
7.1 Selection of 13-bit barcodes １１
7.2 Selection of 8-bit barcodes １１
7.3 Selection of 12-bit barcodes １１
8 Placement of barcode symbols １１
9 Evaluation and requirements for barcode symbol quality １１
9.1 Barcode symbol quality requirements １１
9.2 Barcode symbol quality evaluation １１
9.3 Judgment rules １２
Appendix A (Informative Appendix) GS1 prefix codes allocated to national (regional) coding organizations １３
Appendix B (Normative Appendix) Calculation method of checksum 15
Appendix C (Normative Appendix) 12-digit code and bar code representation 17
Appendix D (Normative Appendix) EAN/UPC bar code symbol identifier 21
Appendix E (Normative Appendix) EAN/UPC bar code reference decoding algorithm 22
Appendix F (Informative Appendix) EAN/UPC bar code printing process quality control technical requirements 25

ICS 35.040
National Standard of the People's Republic of China
GB12904--2008
Replaces G13[2934-2003
Bar code for commodity
Bar code for retail commodity mumbering and bar code marking(IS0/1EC15420:2000,lnfornationtechnologyAutomatic identification and data capture iechriques\Bar code symbology spccification-EAN/UPC,NEQ)2008-11-07 Issued
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China Standardization Administration of China
2009-11-15Implementation
Normative references
Terms and definitions
Code structure
Code formulation principles
Code compilation
5 Barcode representation
E.1 Code system
5.2 Symbol structure of EAN/UPC barcode
5.3 Binary representation of EAN/UPC barcode
6 Design of barcode symbols
Color matching of barcode symbols...
7 Selection of barcode symbols-
7.1 Selection of barcodes for 13-bit codes
7.2 Selection of barcodes for 8-bit codes
7.3 Use of barcodes for 12-bit codes
8 Relocation of barcode symbols ·
9 Evaluation and requirements of bar code symbol quality
9.1 Requirements for bar code symbol quality
9.2 Evaluation of bar code symbol quality
9.3 Judgment rules
Appendix A, (Informative Appendix) (S1 Prefix codes assigned to national (regional) coding Appendix 13
(Normative Appendix) Calculation method of check code Appendix
Appendix D
Appendix L
Appendix F
(Normative Appendix)
(Normative Appendix)
(Informative Appendix)
12-bit code and bar code representation
Symbol identifier of EAN/UPC bar code
Reference decoding algorithm of EAN/UPC bar code
Technical requirements for quality control of EAN/UPC bar code printing process GB 12904—2008
GB12904.2008
Article 4.1.1, Article 4.1.2, Article 4.2.1.2, Chapter 7, Article 9.2, Article 9.3 and Article C.1 and Article C.4 of Appendix C in this standard are mandatory provisions, and the rest are recommended provisions. The standard is equivalent to ISO/TEC15420:20CG "Information Technology - Automatic Identification and Data Collection Technology - Bar Code Symbol Specification EAN/UPC", and is combined with the "(S General Specification)" (2008 Edition) and my country's actual situation. On the basis of GB12904--2003 "Commodity Bar Code", it was renamed "Commodity Bar Code Retail Product Coding and Bar Code Representation", and the standard number remains unchanged. It is an important standard in the commodity bar code system standard system. This standard replaces GB12904--2003 "Commodity Barcode". Compared with GB12504-2503, this standard has the following main changes: the definition of "commodity barcode" in Chapter 3 of the original standard has been revised, the terms and definitions of "commodity identification code", "commodity item", "EAN-13 commodity barcode", "EAN-8 commodity barcode", "UPC·A commodity barcode", "UPC-commodity barcode" and "prefix code" have been deleted, and the terms and definitions of "zero stop commodity", "zero commodity code", "efficiency coefficient" and "prefix code" have been added. - The "commodity identification code" in Chapter 4 of the original standard has been changed to "coding" , the original content was adjusted, and Article 4.3 "Code Making" was added.
The original Chapters 5 and 6 were combined and changed to Chapter 5 "Barcode Symbols", and the original content was adjusted. Chapter 10 "Symbol Size and Color Matching" was changed to Chapter 6 "Barcode Symbol Design". The content of barcode color matching in the original content was adjusted to F.3 of Appendix F. ... The content of Chapter 8 "Symbol Grade" and Chapter 9 "Symbol Quality and Judgment Rules" of the original standard were merged and changed to Chapter 9 "Evaluation and Requirements of Barcode Symbol Quality". The content of Article 8.1 "Symbol Quality Parameters and Classification" and Article 9.1 "Symbol Quality" of the original standard were merged into Article 9.1 "Barcode Symbol Quality Requirements". - Chapter 10 "Symbol Selection Principles" of the original standard was changed to Chapter 7 "Barcode Symbol Selection", and Chapter 8 "Barcode Symbol Placement" was added as a mandatory clause. ...- Updated the original Appendix A and changed it to "(S1) Prefix codes assigned to national (regional) coding organizations" and cancelled the content of the original standard Appendix C \UPC product barcode\, and changed it to "12-digit code and barcode ticket". The original content was adjusted.
The original standard Appendix L "Code system identifier for product barcodes" was retained and renamed Appendix I) \EAN/UPC barcode code identifier\. .…- Deleted the content of the original standard Appendix E "Reading and identification of product codes". - Change the original standard Appendix F "Reference code algorithm for commodity barcodes" to Appendix E and rename it "Reference code algorithm for EAN/UPC barcodes". - Change the content of the original standard Appendix G "Technical requirements for quality control of commodity barcode printing process" to Appendix F. The historical name is "Technical requirements for quality control of FAN/UPC barcode printing process". Appendix B, Appendix C, Appendix D, and Appendix E of this standard are normative appendices, and Appendix A and Appendix F are informative appendices. This standard is proposed and managed by the National Logistics Information Management Standardization Technical Committee. The drafting unit of this standard: China Article Coding Center. The main drafters of this standard; Zhang Chenghai, Huang Yanbin, Luo Qiuke, Li Sucai, Han Shuwen, Shi Zexia. The versions of the standards replaced by this standard are: -GB 12904-1991, GB 129C4-: 1998, GI3 129042003. Shan
1 Scope
Commodity barcodes Retail commodity coding and barcode representation This standard specifies the coding, barcode representation, barcode technical requirements and quality assurance period of retail commodities. This standard applies to the barcode identification of retail commodities. 2 Normative references
GB 12904-2008
The clauses in the following documents become clauses of this standard through reference in this standard. For reference documents with a date, all subsequent amendments (excluding translation errors) or revisions are not applicable to this standard. However, parties that reach an agreement based on this standard are encouraged to study whether to use the latest versions of these documents. For all undated reference documents, the latest versions apply to this standard. GB/T 11988 Information technology - Bit-coded character set for information interchange (GB/T 1988-1998, ISO/IEC 646: 1991)
GI3/T 12508 Alphanumeric character set for optical recognition, second part: OCR-B character set Shape and size of printed images (GB/T 12508-1990, ISO 1073-2: 1976)GB/T 12905
Terms of use
G3/T 14257
Position of product barcode symbol
GB/T18283
GB/T 18348
Product barcodeIn-store barcode
Product barcodeInspection of barcode symbol printing qualityISO/IEC 15420
Information technologyAutomatic identification and data collection technologyBar code symbol specificationEAN/TIPCISO/IEC15424Information technologyAutomatic identification and data collection technologyData carrier identifier (including code system identifier)3 Terms and definitions
(The terms and definitions specified in GB13/T12905 and the following terms and definitions apply to this standard.3.1
The product barcode is composed of a group of regularly arranged bars, spaces and their corresponding codes in the commodity composition, indicating the bar symbol of the product code, including codes and bar codes for retail products, storage and transportation packaging products, logistics units, participating bank locations, etc. 3.2
Retail commodityretailcomnodity
In the retail industry, a product or service that is priced, ordered or settled based on pre-defined characteristics. 3.3
Retail commodity code identificationcoueforrelaitcommodityIn the retail industry, a unique code that identifies the identity of a commodity is globally unique. 3.4
GS1prefix
The first 2 or 3 digits of the commodity code are uniformly allocated by the International Article Numbering Association (GS1). 3. 5
Magnificatian factorThe ratio of the actual size of the barcode to the barcode ruler with a module width (× size) of 0.330 mm. 1
GB 12904—2008
4 Coding
4.1 Code structure
4.1.1 13-digit code structure
4.1.1.1 Composition
The 13-digit code consisting of the manufacturer identification code, commodity item code and check code is divided into four structures. The structure is shown in Table 1 13-digit code structure
Structure type
Abbreviation 1
Structure:
Structure 4
Manufacturer identification code
Xia XIa Xu XuX, XsX?
X1s X12 X:1 X10 Xg Xn X+ XeXiXiaXXnXXX,X,X
xx.xxux,xx,xsx.x.
4.1.1.2 Manufacturer identification code
Commodity item code
XX,XX X2
The manufacturer identification code consists of 10 digits. China Article Coding Center is responsible for allocating and operating the verification code
The prefix code of the above identification code is the front code. The prefix code assigned by the International Commodity Coding Association to the China National Library of China is 690~695. The prefix code assigned by the International Commodity Coding Association to the national (or regional) coding organization is shown in Appendix A. 4.1.13 Commodity item country code
Commodity item code consists of 5-2 digits: Generally, the commodity coding center can be used for commodity coding. 1. 1. 1. 4 Verification code
The verification code is a digit, used to check the correctness of the entire code. The calculation method of the check code is given in Appendix B. 4.1.2 8-bit code structure
4.1.2.1 Composition
The 8-bit code consists of three parts: prefix code, commodity item code and check code. Its structure is shown in Table 2. Table 2 8-bit code structure
Prefix code
4.1.2.2 Prefix code
Product item code
.X,XX
Check code
X~X is a prefix code. The prefix code assigned to the China Article Coding Center by the International Article Coding Association is 690~6. 4.1.2.3 Commodity item code
X,~X is a commodity item code, consisting of 4 digits. The China Article Coding Center allocates and displays it. 4.1.2.4 Check code
Xl is a check code, which is 1 digit and is used to check the correctness of the entire code. The calculation method of the check code is shown in Appendix B. 4.1.3 12-digit code structure
12-digit code structure, barcode representation, barcode symbol selection and quality determination are shown in Appendix C. Note: According to customer requirements, zero-risk products exported to North America can use 2-digit codes. 4.2 Code compilation principles
Retail product codes are a unified whole and should be used as a whole in the product flow. When compiling retail product codes, the following basic principles should be observed.
4.2.1 Uniqueness principle
4.2.1.1 Similar products are assigned the same product code, and products with similar basic characteristics are considered to be the same product. 4.2.1.2 Different products should be assigned different product codes, and products with different basic characteristics are considered to be the same product. Note: Under normal circumstances, the basic characteristics of a product include product name, trademark, type, specification, quantity, packaging type and other product characteristics. Enterprises should assign unique product codes to products based on the product characteristics of the industry and their own product management requirements. 2
.- . .
4.2.2 Non-meaningful principle
The commodity item code in the retail commodity code does not indicate any specific information related to the commodity. 4.2.3 Stability principle
The commodity code should remain unchanged if the basic characteristics of the commodity have not changed. 4.3 Code compilation
4.3.1 Compilation of codes for retail commodities in separate packages GB 12904---2008
Single retail commodity in separate packages refers to retail commodities in separate, indivisible separate packages. The compilation of the product code generally adopts the 13-digit code structure specified in 4.1.1. When the product packaging is very small and meets any of the following three conditions, the 8-digit code structure specified in 4.1.2 shall be adopted: - the printing area of ​​the bar code symbol of the 13-digit code exceeds one-fourth of the maximum surface area of ​​the product label or one-eighth of the total printing area;
- the maximum surface area of ​​the product label is less than 40u or the total printable area is less than 80cm2; - the diameter of the product itself is less than 3 cm 4.3.2 Preparation of retail commodity codes for combination packages 4.3.2.1 Preparation of retail commodity codes for standard combination packages The component commodities of standard combination packages refer to the commodities that are a standard and stable combination package composed of multiple identical individual commodities. The preparation of the commodity code generally adopts a 13-digit code structure and should not be the same as the code of the individual commodity contained in the package. 4.3.2.2 Preparation of retail commodity codes for mixed combination packages The retail commodity of mixed combination packages refers to the commodities that are a standard and stable combination package composed of multiple different individual commodities. The preparation of the commodity code generally adopts a 13-digit code structure, but should not be the same as the code of the commodity contained in the package. 4.3.3 Preparation of retail commodity codes for variable variables
The code of the variable component commodity is used as the commodity consumption unit within the store or in a closed system. The selection of its commodity code is shown in (3/T18283.5 Barcode representation
5.1 Code system
The barcode representation of the component commodity code adopts ISO/ EAN/UPC barcode system defined in IEC15420, EAN/UPC barcode has EAN-13, EAN-8, UPC-A, UPC-E structure, UPC-A, UPC-E barcode structure see Appendix C. EAN/UPC barcode system identifier Appendix ID:
5.2 EAN/UPC barcode symbol structure
5.2.1 EAN/UPC barcode symbol structure
EAN-13 barcode is composed of left The EAN-13 barcode consists of a blank area on the left, a start character, a data character on the left, a separator in the middle, a data character on the right, a check character, a terminator, a blank area on the right, and characters for human identification. See Figures 1 and 2. The data character is divided into a number character, a check character, a terminator, a blank area on the right, and characters for human identification. 12904.-2008
East side Laoshan DistrictbZxz.net
The fun begins
5. 2. 1. 1 Left blank area
Starting data symbol
(indicating the word "excitation")
Zhongzhou foreign medical symbol
113 modules
95 modules
Data symbol
(indicating 5 excellent learning)
(indicating bit excitement)
Figure 2 Schematic diagram of EAN-13 bar code symbol composition
Grid symbol
The leftmost area of ​​the upper bar code has the same reflectivity as the wearer, and the minimum width is 11 blocks. 5.2.1.2 The start character
is located on the right side of the barcode symbol, indicating the beginning of the information. It consists of 3 modules. 5.2.1.3 The left data character
is located on the right side of the start character, indicating a group of barcode characters with 6 digits of information. It consists of 42 modules. 5.2.1.4 The middle separator
is located on the right side of the left data character, and is a special symbol that divides the barcode character. It consists of 5 modules. 5.2.1.5 The right data character
is located on the right side of the middle separator, indicating a group of barcode characters with 5 digits of information. It consists of 35 modules. 5.2.1.6 The check character
is located on the right side of the data character, indicating the barcode character with a checksum, and consists of 7 modules. 5.2.1.7 The termination character
is located on the right side of the barcode symbol check character, indicating the end of the information. It consists of 3 modules. 5. 2. 1.8 The right blank area
The right blank area
is located between the barcode symbol and the back of the symbol. Its minimum width is 5.2. In order to ensure the width of the blank area, a "\" symbol can be added to the lower corner of the barcode symbol. The position of the "\" symbol is shown in Figure 3. The end symbol
is the smallest width of the blank area
16 1901234567892
T"" is not a warning stop symbol
. Figure 3 The position of "\" in the right blank area of ​​the EAN-13 barcode symbol 5.2. 1.9 Human identifiable characters
Located below the barcode symbol, the 13-digit number corresponding to the barcode. Human identifiable characters should preferably use the OCRB character set specified in GB/T12508; the minimum distance between the character body and the bottom of the barcode character is 0.5 module width. 5.2.2 Symbol structure of EAN-8 barcode
EAN-8 barcode consists of a left blank area, a start character, a left data character, a delimiter, a right data character, a check character, a stop character, a right blank area and human identifiable characters, as shown in Figure 1 and Figure 2. 5,4
Zonglaobaix
Yueyaofu
Right side number character
Period number character
Middle
Separator! Check character
Start
Left stroke control area
69012341
-side blank area
Ten real people recognition characters
Figure 4JEAN-8 bar symbol structure
Module
67 modules
Start side data character
(indicates 1 Figure 5 Schematic diagram of the composition of FAN-8 product barcode symbols 5.2.2.1 The structure of the start symbol, middle separator, check symbol and end symbol of EAN-8 barcode is the same as that of EAN-13 barcode. GB 12904—2008||tt| ... The left image is in the white area on the side. The minimum width of the left edge of the start symbol is 7 modules. The minimum width of the right edge of the termination symbol is 7 modules. Figure 6 The position of the "\" in the blank area of ​​the EAN-8 bar code symbol 5.2.2.3 The left data symbol represents a 1-digit message and is composed of 28 modules. 5.2.2.4 The right data symbol represents 3-digit information and is composed of 21 modules. 5.2.2.5 The 8-digit number corresponding to the bar code is located below the bar code symbol for human identification. 5.3 EAN/UPC 5.3.1 Binary representation of barcodes 5.3.1 Binary representation of EAN/UPC barcode character set The EAN/UPC 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 7. The barcode character set can represent 10 numeric characters from 0 to 9. The binary representation of the EAV/UPC barcode character set is shown in Table 3 and Figure 8.5
G 12904——2008
Number Ning and other symbols
A connection block
Figure 7 Bar code symbol composition
Table 3 Binary representation of RAN/JPC bar code character set A Zi Le
0001101
Go110o1
0010011
0111101
0100011
0110001
OlolIle
3111011|| tt||o110111
co1o11
Withdraw character
A了()
3 subset (if)
0110011
o01101
010000:
c00101
0010001
OGOTOO
0010111
1A The number of "bar\" modules contained in the frame code characters in the subset is an odd number, which is called odd arrangement. The number of "bars" contained in the bar code characters in the BC subset is the code number, which is mostly even. Figure 8 Schematic diagram of EAN/UPC bar code character set
C subset
1100170
1101109
1c0010
1C11100
100111n
lcioo0n
1000100
1601cor:
11:010c
GB 12904---2008
5.3.2 Binary representation of FAN-13 barcode
5.3.2.1 Start and end characters
The binary representation of the start and end characters is "1C1", see Figure 9, 5.3.2.2 Middle separator
The binary representation of the middle separator is "01010", see Figure 9, Guangjianfenya character
Start and end characters
Figure 9 Schematic diagram of EAN/LiPC barcode start, end, and middle separators 5.3.2.3 Data characters and checksums of EAV-13 barcodes Verification symbol 5.3.2.3.113 The first digit of the left side of the code is the prefix code. The left side data character selects the A, B subset according to the value of the prefix code, see Table 4.
Table 4 Selection rules for the left side data character EAN/UPC bar code character set EAN13 left side data character product bar code character set digit and serial number
Prefix code value
Example: Define a binary representation of the left side data character of a 13-digit code 6901234567892. According to Table 4, the product bar code character set selected for the left side data character with the prefix code "g\" is A3BBAA in sequence. According to the query in 3, the binary representation of the data symbol "9C1234\ is shown in Table 5. Table 5 Binary representation of the left data symbol when the prefix code is "6" Example 3
Abandoned data symbol
Bar code character set
010c11
0011011
001011
Binary length
The right data symbol and check symbol are both represented by the C subset. 5. 3. 2. 3. 23
5.3.2.4 Data and check symbols of EAN-8 bar code The left data symbol is represented by the A subset; the right data symbol and check symbol are represented by the C subset. 7
CB 12904—2008
6 Barcode symbol design
6.1 Dimensions
6.1.1 Module width (x dimension)
The module is the smallest unit of the barcode symbol. When the magnification factor is 1.OC, the module width of the EAN/LPC barcode is 0.330mm.
6.1.2 Barcode character space dimensions
When the magnification factor is 1.00, the dimensions of each part of the EAN/UPC barcode character set are shown in Figure 10. The bar width of barcode characters 1, 2, 7, and 8 should be appropriately adjusted, and the adjustment amount is 1/13 of a module width. See Table 5. The allowable deviation of EAN/UPC barcode character dimensions is shown in F1
A
The left example shows that the width of the blank area of ​​the bar code characters 1., 2., 7, 8 has been appropriately adjusted.
.0.330
Figure 10 Bar code character size
Single hall is millimeter
Font size
6.1.3 Blank area width
Table 6 Bar code characters 1, 2, 7, 8 When the adjustment amount of the bar width is A, B or C and the magnification factor is 1.0c, the minimum width of the blank area on the right side of the EAN13 barcode is 3.63mm and 2.31mm respectively, and the minimum width of the blank area on the right side of the EAN-8 barcode is 2.31mm. 6.1.4 Size of 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 EAN bar code is shown in Figure 11. The size of the start character, middle separator and end character of EAN bar code is shown in Figure 11. The size of the start character, middle separator and end character of EAN bar code is shown in Figure 12. 6.1.5 Size of characters for human identification When the magnification factor is 1.00, the height of characters for human identification is 2.75mm. 6.1.6 Symbol size of EAN-13 product bar code When the magnification factor is 1.00, the symbol size of EAN-13 bar code is shown in Figure 12. 6.1.7 FAN-8 Barcode symbol size
When the magnification factor is 1.00, the size of the EAN-8 barcode is shown in Figure 13. 6.1.8 Symbol size and magnification factor
The magnification factor of FAN/TJPC barcodes is 0.80~2.00. The barcode symbol simplifies or shrinks with the change of the magnification factor. Since the short bar height will affect the reading of the barcode derivative, it is not advisable to shorten the bar height arbitrarily. The module width corresponding to different magnification factors and the main size of the AN barcode are shown in the table? (Add a column of barcode length), 0
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