Bar code for commodity — Bar code symbol print quality verification
1 Scope
This standard specifies the inspection methods of print quality of bar code symbols.
This standard is applicable to the quality inspection of printed bar code symbols.
2 Normative references
The following normative documents contain provisions which, through reference in this text, constitute provisions of this standard. For dated references, subsequent amendments (excluding corrections) to, or revisions, of any of these publications do not apply. However parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition applies.
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 2828.1-2003, ISO 2859-1: 1999, IDT)
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 Bar coding terminology
GB/T 13262 Single sampling procedures and tables for inspection having desired operating characteristics by attributes for percent nonconforming (GB/T 13262-1991, neq JIS Z9002：1975)
GB/T 14257 Location of bar code symbol for commodity
GB/T 14258-2003 Information technology — Automatic identification and data capture techniques — Verification of print quality of bar code symbols (ISO/IEC 15416: 2000, MOD)
GB/T 14437 Single sampling procedures and tables by attributes for product quality audit
GB/T 15425 UCC/EAN — 128 bar code
GB/T 15482 Single sampling procedures and tables for product quality audit of small population by attributes
GB/T 16306 Procedures and the plan of sampling for repeat test or inspection in product quality audit
GB/T 16830 Bar code for commodity — Dispatch commodity numbering and bar code marking
ISO/IEC 15426-1 Information technology — Automatic identification and data capture techniques — Bar code verifier conformance specification — Part 1: Linear symbols
GS1 General specifications
3 Terms and definitions
For the purposes of this standard, the terms and definitions given in GB/T 12904-2008, GB/T 12905 and GB/T 14258-2003 and the following apply.
3.1
reference decode
parameters of the data process represented by bar code symbols that are determined by the specified reference decode algorithm according to the method specified in GB/T 14258-2003
3.2
correctness of decode
characteristics of the data obtained by decoding the bar code symbol by conforming to the bar code coding standard is same with the data represented by the bar code symbol
4 Sampling
In the inspection of bar code print quality, the sampling plan shall be made according to the inspection category and the applicable sampling standard:
a) Continuous batch of purchase inspections with several manufacturers to choose from and end-of-manufacturing inspections with confirmed users shall adopt GB/T 2828.1 to determine the sampling plan;
b) Single-batch purchase, process and end-of-manufacturing inspection shall adopt GB/T 13262 to determine the sampling plan;
c) Inspection of production process stability shall adopt GB/T 2829 to determine the sampling plan;
d) Inspection and acceptance shall be carried out by the supplier and the purchaser, and sampling agreement has been made in the contract shall determine the sampling plan according to the agreement;
e) When the overall quantity of bar code quality supervision and inspection supervision is large, GB/T 14437 shall be adopted to determine the sampling plan;
f) When the overall quantity of bar code quality supervision and inspection supervision is small, GB/T 15482 shall be adopted to determine the sampling plan;
Foreword i
1 Scope
2 Normative references
3 Terms and definitions
4 Sampling
5 Inspection conditions
5.1 Environmental conditions
5.2 Measurement apparatus
5.3 Tested sample
6 Inspection items
6.1 Reference decode
6.2 Optical characteristics
6.3 Decodability
6.4 Z dimension
6.5 Width to narrow ratio
6.6 Quiet zone width
6.7 Bar height
6.8 Print position
6.9 Others (other requirements or parameters of bar code symbol quality in GB 12904-2008, GB/T 15425 or GB/T 16830)
7 Inspection method
7.1 General requirements
7.2 Scanning and measurement
7.3 Scan reflectance profile analysis and parameter value determination
7.4 Z dimension
7.5 Width to narrow ratio(N)
7.6 Quiet zone width
7.7 Bar height
7.8 Print position
8 Inspection data processing
8.1 Determination of scan reflectance profile grade
8.2 Determination of symbol grade
8.3 Expression of symbol grade
8.4 Expression of each single parameter inspection result of scan reflectance profile
9 Judgment
10 Inspection report
Annex A (Informative) Inspection methods of bar/space reflectance, print contrast signal and bar/space dimensional deviation
Annex B (Normative) Measurement of optical characteristic parameters
Annex C (Normative) Determination of decodability
Annex D (Normative) Measurement of Z dimension and width to narrow ratio
Appendix E (Informative) Reference format of inner page of inspection report
