Brief introduction of scanner resolution classification

As we all know, the type of bar code is not only one-dimensional, two-dimensional, but also low density and high density. The density of the bar code produced is mainly 1mil, 2mil, 3mil, 4mil and 5mil. The smaller the number, the higher the density, the more common is the latter three.In fact, in the actual production, manufacturing and commodity circulation industry, 3mil and 4mil barcodes are rarely used, because they are too small and require high printing process. It requires a carbon thermal transfer printer of more than 600DPI to print clearly. Therefore, not all barcode scanning guns can scan 3mil and 4mil barcodes.