About the quality problem of the bar code printing packaging bags

1, to save scan read correctly, printing out the barcode should be neat and clear and the operator has no obvious deformity ( Defect) , empty without excess residual black spots ( Stain) , usually defect and stain the narrowest barcode nominal diameter should be no greater than 0. 4 times. 2, control the size of the barcode error is read in increasing literacy rate, reduce the decoding error rate. It should not only improve the quality of plate making, printing, or print request, also want to improve the tolerance requirements of the device to read. After 3, in order to read, reliable and printing bar code in the article should have obvious contrast between the signal and empty, the greater the contrast signal of bar code, the better the performance of its readers. 4, printing must strictly control the printing tolerance, otherwise will influence the effect of read. 5, to the edge of the barcode roughness has certain requirements, when the rough is too big, cannot read.