Barcode label quality control involves multiple aspects to ensure that the barcode can be read accurately and quickly in various application scenarios. The following are the main aspects of Barcode label quality control:
Code system compliance:
The barcode label code system must comply with international or national standards, such as EAN-13, Code 128, etc. Standard code systems can ensure that barcodes can be correctly recognized on different scanning devices.
Printing quality:
The printing quality of barcode labels is crucial, including the clarity, contrast, edge clarity, etc. of the barcode. Generally, the maximum diameter of defects and stains should be less than or equal to 0.4 times the nominal width of the narrowest bar code, or the area occupied by defects and stains should not exceed 1/4 of the area of a circle with a diameter of 0.8 times the nominal width of the narrow bar.
The ink layer thickness of the bars and spaces in the barcode should also be controlled within a certain range (<0.1mm) to ensure the contrast value of the bars and spaces on different scanning planes, so as to obtain reliable input signals.
Dimensional accuracy:
The symbol dimensional error of the Barcode Label must be controlled within a certain range to ensure the first reading rate of the reading device and reduce the decoding error rate. This usually includes the basic size tolerance of the barcode, which varies with different magnifications.
Optical properties:
There should be a clear contrast between the lines and spaces in the barcode, the reflectivity of the space should be as large as possible, and the reflectivity of the bars should be as small as possible. This obvious contrast helps to improve the readability of the barcode.
Durability:
The Barcode Label must have certain water resistance, oil resistance, chemical resistance and other characteristics to ensure that it is not easily damaged during transportation, storage and use, and ensure the long-term readability of the barcode.
Edge roughness:
Edge roughness refers to the unevenness of the barcode edge, which must be controlled within a certain range to ensure that the element width meets the size requirements of the printing tolerance on all possible scanning tracks.
Material selection:
Selecting the right printing material and ink is also an important aspect of Barcode Label quality control. The printing materials with good dimensional stability, moderate ink diffusion, low permeability, good smoothness and finish, and inks with good uniformity and diffusion should be selected.
In summary, the quality control of Barcode Label is a comprehensive process involving multiple aspects such as code compliance, print quality, dimensional accuracy, optical properties, durability, edge roughness and material selection. Only by strictly controlling these aspects can we ensure that Barcode Label can perform at its best in various application scenarios.
