How to distinguish the level of printing bar code machine

1. The standard meaning of bar code grade division

The lowest level in the evaluation grade of curve parameters (minimum edge ratio, decoding ability, strip void contrast, decoding ability, defect degree) obtained by bar code detection is the grade of the curve. The grade of each parameter and the grade of the scanning reflectance curve are represented by letters A, B, C, D and F. Corresponding to 4, 3, 2, 1 and 0 in the national standard, the national standard requires that the symbol level is not less than 1.5/10/670, where: 1.5-bit overall symbol quality level; 10-bit aperture measurement number; 670 is the quantum high reaction wavelength in nanometers.

A bar code corresponding to symbol quality level: 4.0-3.5

B bar code corresponding symbol quality level: 3.4-2.5

C bar code corresponding to symbol quality level: 2.4-1.5

D bar code corresponding to symbol quality level: 1.4-0.5

F level can't read.

2. The grade of barcode symbol indicates its printing quality and applicable occasions

Class A bar codes are usually well read and suitable for A variety of occasions.

The performance of level B barcode in the reading process is not as good as that of level A, and the symbol may need to be scanned repeatedly.

C bar codes usually require the use of repeatable scanning equipment with special multiple scan lines to obtain a good reading effect.

Class D bar codes may not be read by certain reading devices.

F bar code is not qualified, can not be used.

There are many factors that affect the bar code level: 1. Whether the bar code generation of the bar code software itself is reasonable, standard and scientific; 2. 2, in the case of ensuring that the software generation is no problem, the printing environment and media are also the main factors, such as printer accuracy, ink, paper, etc.; 3. The density setting of the bar code itself should be controlled within a reasonable range. If the density is too large, the bar code level will be affected. 4, bar code label printing or printing to ensure integrity, clear, clean, no ink infiltration phenomenon.