Reason 1:  The source file wasn't created in the ideal quality:

Solution: Print the sample label to test if your printer is working well. 

You can download the sample label from USB Driver: 

OR website


Reason 2:  High print speed or density. 

Solution: Try reducing your print speed (try 3 in/sec) and density (try 3 as well) to see if you get a better result.


Here's video tutorial.



For Mac

①Select "Printer Features" in "Preview" 

②You can change the printing speed and the Darkness of your printing 

(Larger number means higher Darkness)


For Windows

①Go to "Control panel" -> "Devices and Printers"

(Right click on "This PC", choose "Properties", then click on "Control panel"-> "Devices and Printers")

-> Right click on "4BARCODE 4B-2054F" -> choose "Printer Preferences"

②Go to "Option" -> Untick "Use Current Printer Settings"

③You can change the printing speed and the Darkness of your printing

(Larger number means higher Darkness)