GB/T 14258-1993 Barcode symbol printing quality inspection GB/T14258-1993 standard download decompression password: www.bzxz.net
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National Standard of the People's Republic of China The verification of printed quality of bar code symbol The verification of printed quality of bar code symbol1Subject content and scope of application This standard specifies the verification method of bar code symbol printing quality. This standard is applicable to the verification of the printing quality of various bar code symbols. 2 Reference standards GB2828 GB 7705 GB12053 GB 12508 GB 12904 GB 12905 GB 12906 Batch inspection sampling procedures and sampling tables by attributes (applicable to inspection of continuous batches)Lithographic decorative printed products GB/T 14258-93 Alphanumeric character set for optical recognition Part 1: OCR-A character setShapes and dimensions of printed imagesAlphanumeric character set for optical recognition Part 2: OCR-B character setShapes and dimensions of printed imagesGeneral commodity barcodes General terms for barcode systems Terms of barcode symbols China Standard Book Number (ISBN part)Barcode GB12907 GB 12908 Codabar Barcode Sanjiu Barcode GB/T 14257 3Terms General Commodity Barcode Symbol Position 3.1 De-inking: Printing defect of the bar in the barcode symbol, its reflectivity is similar to the reflectivity of the space. 3.2 Stain: Printing defect in the empty or blank area of the barcode symbol, its reflectivity is similar to the reflectivity of the bar. 3.3 Printing thickness: The difference in thickness between the bar and the space of the barcode symbol. 3.4 Magnification factor: The ratio of the length of the barcode symbol to the standard size. 4 Inspection items 4.1 Appearance 4.2 Bar (space) reflectivity, printing contrast (PCS value). 4.3 Bar (space) size error. 4.4 Blank area size. 4.5 Bar height. 4.6 Size of numbers and letters. 4.7 Check code. 4.8 Decoding accuracy. 4.9 Magnification factor. Approved by the State Administration of Technical Supervision on March 20, 1993 281 Implemented on May 1, 1993 4.10 Printing thickness. 4.11 Printing position. 5 Technical requirements 5.1 Appearance GB/T 14258--93 5.1.1 The surface of the barcode symbol is neat and tidy, without obvious dirt, wrinkles, damage or perforation. 5.1.2 The numbers, letters and special symbols in the barcode symbol are printed completely and clearly without ambiguity. 5.1.3 The barcode characters have no obvious ink loss, stains or line breaks, and the edges of the bars are neat and without obvious bending or deformation. 5.1.4 The ink color of the barcode characters is uniform, with no obvious differences. 5.2 The technical requirements of clauses 4.2 to 4.11 shall comply with the national barcode standards used by the samples. 6 Inspection methods 6.1 Environmental requirements: The temperature of the inspection room is 23±2°C, and the relative humidity is 50%±5%. 6.2 Sample processing 6.2.1 The sample should be flat, wrinkle-free and non-deformed. 6.2.2 When inspecting the barcode symbols on labels, labels and packaging, sufficient fixed dimensions should be retained around the sample. 6.2.3 When inspecting the barcode symbols on the physical packaging, the sample does not need to be processed. 6.3 Appearance 6.3.1 Self-inspection The sample is placed under the Ds5 standard light source with a color temperature of 5500~6500K, and visually inspected according to clause 5.1. 6.3.2 Instrument inspection 6.3.2.1 Measuring instruments Use microscope and mesh eyepiece micrometer. 6.3.2.2 Measuring steps a. Use microscope and mesh eyepiece micrometer to enlarge and divide the stains and de-inking, and calculate their area according to the number of grids occupied by the stains and de-inking. Compare the area value obtained in a with the area value specified in the national barcode standard used for the sample. b. 6.4 Bar (blank) reflectivity 6.4.1 Measuring conditions The measuring conditions shall comply with the national barcode standard used for the sample under inspection. 6.4.2 Measuring instruments Use instruments that meet the requirements of clause 6.4.1. 6.4.3 Measuring steps 6.4.3.1 Instrument calibration. 6.4.3.2 Place a substrate under the sample. The substrate should be a diffuse reflective material with a reflection density of more than 1.50 and no spectral selectivity. 6.4.3.3 Take five measurement positions evenly in the longitudinal direction of the bar code character bar, and measure the reflectivity of each bar (space) from the start symbol to the end symbol one by one. Repeat the above steps for each height position. 6.4.4 Data Processing 6.4.4.1 Take the maximum value of the reflectivity of each bar and the minimum value of the reflectivity of each space at the same height position as the reflectivity of the bar (space) at this height position. 6.4.4.2 Take the maximum value of the reflectivity of each bar and the minimum value of the reflectivity of each space at five different height positions as the reflectivity of the bar (space) of the bar code symbol. 6.5 Printing Contrast (PCS Value) The printing contrast (PCS value) is calculated according to formula (1). Where: RL is the reflectivity of the space in a barcode; Rp is the reflectivity of the bar in the barcode. 6.6 Bar (space) size error 6.6.1 The measurement conditions are the same as those in 6.3.1. 6.6.2 Measuring instrument GB/T 14258-93 Length measuring instrument with a minimum graduation value of 0.01mm. 6.6.3 Measurement steps (1) Evenly select five measurement positions in the longitudinal direction of the barcode character bar, measure the size of each bar (space) one by one from the start symbol to the end symbol, and repeat the above steps for each height position measurement. 6.6.4 Data processing 6.6.4.1 Take the maximum and minimum values of the size errors of each bar (space) at the same height as the maximum and minimum values of the size error of the bar (space) at this height. 6.6.4.2 Take the maximum and minimum values of the size errors of each bar (space) at five different height positions as the bar (space) size error of the bar code symbol. 6.7 Blank area size Measure with a steel ruler with a minimum graduation value of 0.5mm under the light source specified in Article 6.3.1. 6.8 Bar height Measurement method is the same as Article 6.7. 6.9 Number and letter size Measurement method is the same as Article 6.7. 6.10 Check code Check according to the calculation method specified in the national bar code standard used by the sample. 6.11 Decoding correctness Check the result of reading the bar code symbol with the bar code reading equipment with the visual character. 6.12 Magnification factor The measurement method of the bar code length size is the same as Article 6.7, and the magnification factor is calculated according to the definition of Article 3.4. 6.13 Printing thickness Measure with a thickness gauge with a minimum graduation value of 0.01mm or an instrument of equivalent accuracy under the light source specified in clause 6.3.1. 6.14 Printing position Visual inspection shall be carried out in accordance with the provisions of GB/T14257. 7 Inspection report The inspection report shall be determined according to the inspection content of the sample. The inspection report of the general commodity bar code symbol is shown in Appendix A. The inspection report format of other types of bar code symbols is shown in Appendix A. 8 Sampling This standard is sampled in accordance with the national standard GB2828. 286 Sample name Inspection unit Printing carrier Inspection date Inspection compliance standards Test results 1. Appearance 5. Size of the blank area 7. Size of numbers and letters 9. Decoding correctness 11. Printing thickness Reviewer: Inspector: GB/T14258-93 Appendix A General commodity bar code symbol quality inspection report (reference) General commodity bar code symbol quality inspection report Barcode number Barcode type Printing method Inspection date 2. Bar (space) reflectivity 4. Bar (space) size error 6. Bar height 8. Check code 10.Magnification factor 12. Printing position Year 199 Note: 1) "V" means qualified; \×\ means unqualified; "/\" means this item is not inspectedbZxz.net Serial number: Additional instructions: This standard is proposed by China Article Numbering Center. GB/T14258-93 This standard is drafted by China Article Numbering Center. The main drafters of this standard are Wu Hailian and Zhou Gang. 288 Tip: This standard content only shows part of the intercepted content of the complete standard. If you need the complete standard, please go to the top to download the complete standard document for free.