GB/T 18348-2022 English PDF (GBT18348-2022)

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GB/T 18348-2022: Bar code for commodity - Bar code symbol print quality verification
GB/T 18348-2022
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 35.040
CCS A 24
Replacing GB/T 18348-2008
Bar code for commodity - Bar code symbol print quality
verification
ISSUED ON: MARCH 09, 2022
IMPLEMENTED ON: OCTOBER 01, 2022
Issued by: State Administration for Market Regulation;
Standardization Administration of the PRC.
Table of Contents
Foreword ... 4 
1 Scope ... 7 
2 Normative references ... 7 
3 Terms and definitions ... 8 
4 Determination of sampling plan ... 10 
5 Verification conditions ... 10 
5.1 Environmental conditions ... 10 
5.2 Verification equipment ... 11 
5.3 Samples under verification ... 12 
6 Verification items ... 12 
7 Verification methods ... 13 
7.1 Overview of verification methods ... 13 
7.2 Scan measurement ... 13 
7.3 Manual measurement ... 16 
8 Verification data processing ... 18 
8.1 Overview of verification data processing ... 18 
8.2 Individual parameter grades of scan reflectance profile ... 18 
8.3 Individual parameter average grade of scan reflectance profile ... 20 
8.4 Grade of scan reflectance profile ... 21 
8.5 Data processing of manual measurement parameters ... 21 
8.6 Symbol grade ... 22 
9 Comprehensive determination of symbol quality ... 23 
10 Verification report ... 23 
Appendix A (Informative) Verification methods for bar/space reflectance, print contrast,
and bar/space dimensional deviation ... 25 
A.1 Verification method for bar/space reflectance and print contrast ... 25 
A.2 Verification method for bar/space dimensional deviation ... 26 
A.3 Verification method for average bar width deviation ... 26 
Appendix B (Normative) Determination of optical characteristic parameter values .. 28 
B.1 Overview ... 28 
B.2 Minimum reflectance ... 28 
B.3 Symbol contrast ... 28 
B.4 Minimum edge contrast... 28 
B.5 Modulation ratio ... 28 
B.6 Defects ... 29 
Appendix C (Informative) Description of defects algorithm improvement ... 31 
Appendix D (Normative) Determination of decodability ... 33 
D.1 General rules ... 33 
D.2 EAN-13, EAN-8, UPC-A, UPC-E bar codes ... 33 
D.3 ITF-14 bar code ... 36 
D.4 GS1-128 bar code ... 38 
Appendix E (Normative) Measurement of Z dimension and wide to narrow ratio ... 41 
E.1 Measurement of Z dimension ... 41 
E.2 Measurement of wide to narrow ratio ... 42 
Appendix F (Normative) Parameters for determination of scan reflectance profile grade
and symbol grade value of different code systems ... 43 
F.1 Parameters for determination of scan reflectance profile grade of different code systems
... 43 
F.2 Parameters for determination of symbol grade value of different code systems ... 43 
Bar code for commodity - Bar code symbol print quality
verification
1 Scope
This document specifies the determination of sampling plan, verification conditions,
verification items, verification methods, verification data processing, comprehensive
determination of symbol quality, and verification report for bar code symbol print
quality verification.
This document applies to the quality verification of printed bar code symbol for
commodity.
2 Normative references
The contents of the following documents, through normative references in this text,
constitute indispensable provisions of this document. Among them, for dated references,
only the edition corresponding to that date applies to this document. For undated
references, the latest edition (including all amendments) applies to this document.
GB/T 2828.1 Sampling procedures for inspection by attributes - Part 1: Sampling
schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
GB/T 2828.4 Sampling procedures for inspection by attributes - Part 4: Procedures
for assessment of declared quality levels
GB/T 2828.11 Sampling procedures for inspection by attributes - Part 11: Procedures
for assessment of declared quality levels for small population
GB/T 2829 Sampling procedures and tables for periodic inspection by attributes
(apply to inspection of process stability)
GB 12904-2008 Bar code for commodity - Retail commodity numbering and bar
code marking
GB/T 12905-2019 Bar code terminology
GB/T 13262 Single sampling procedures and tables for inspection having desired
operating characteristics by attributes for percent nonconforming
GB/T 14257 Commodity bar code symbol location
GB/T 14258 Information technology - Automatic identification and data capture
techniques - Verification of print quality of bar code symbols
GB/T 15425 Commodity bar code - 128 bar code
GB/T 16306 Re-inspection and re-test procedures for assessment of declared quality
levels
GB/T 16830 Bar code for commodity - Dispatch commodity numbering and bar code
marking
GB/T 26228.1 Information technology - Automatic identification and data capture
techniques - Bar code verifier conformance specification - Part 1: Linear symbols
ISO/IEC 15416:2016 Automatic identification and data capture techniques - Bar
code print quality test specification - Linear symbols
GS1 General specifications
3 Terms and definitions
The terms and definitions defined in GB 12904-2008 and GB/T 12905-2019 and the
following ones apply to this document.
3.1
Bar code for commodity
A universal bar code symbol used to identify commodities and their attributes, including
the numbering and bar code marking of retail commodities, dispatch commodities,
logistics units, assets, service relationships, and locations of participants, etc.
[Source: GB/T 12905-2019, 2.70, modified]
3.2
Element reflectance nonuniformity; ERN
The difference between the highest peak and the lowest valley of reflectance corrected
by the algorithm in an element (including clear area) on the scan reflectance profile.
[Source: GB/T 12905-2019, 6.30, modified]
3.3
Defects
Z dimension
The arithmetic mean of measured values of narrow element or module size.
[Source: GB/T 14258-2003, 3.24, modified]
3.10
Encoded data
The data to be represented in the bar code symbol.
4 Determination of sampling plan
In the verification of commodity bar code print quality, the sampling plan shall be
determined according to the verification category and applicable sampling standards:
a) For successive batches of purchase inspections with several manufacturers to
choose from and exit-factory verifications with definite users, use GB/T 2828.1
to determine the sampling plan;
b) For the purchase, process, and exit-factory verification of a single batch, use GB/T
13262 to determine the sampling plan;
c) For the inspection of the stability of production process, use GB/T 2829 to
determine the sampling plan;
d) For quality supervision and verification, where the total amount of supervision is
large, use GB/T 2828.4 to determine the sampling plan;
e) For quality supervision and verification, where the total amount of supervision is
small, use GB/T 2828.11 to determine the sampling plan;
f) For quality supervision and re-inspection, use GB/T 16306 to determine the
sampling plan;
g) For the acceptance verification of both the supplier and the purchaser, if there is
a sampling agreement in the contract, it shall determine the sampling plan
according to the agreement.
5 Verification conditions
5.1 Environmental conditions
5.1.1 Temperature and humidity
5.2.1.5 Measuring optical path
The measuring optical path shall comply with the ...