Color. Make sure you are printing bar codes in true black. This means both the image on the screen and the cartridge printing the bar codes should be black. Set the cartridge setting in the printer driver to Color + Black. If the bar code is true black on-screen (color value #000000), the driver will print the bar code with the black cartridge only. Bar codes printed in any color but black may result in poor scanning quality.

Print Quality. Adjusting print quality settings can improve bar code scan quality.  Specifically lowering ink saturation can help.  See this article for more information. Often scan quality will improve if you decrease your quality setting in the printer driver.

Bloom Compensation. The driver defaults to optimal values to provide the best possible bar code scan for most bar codes, quality settings and label stock. However, certain label stock - bar code - quality setting combinations may require that you slightly adjust these values.

You may edit the following file for this purpose:

1. LX900: "C:\ProgramData\PTI\Drivers\Color Label 900\pt_900.ini"
   
2. LX910:  "C:\ProgramData\PTI\Drivers\Color Label 910\pt_lp910.ini"
   
3. LX600/610: "C:\ProgramData\PTI\Drivers\Color Label 610\pt_lp610.ini"
   
4. LX500: "C:\ProgramData\PTI\Drivers\Color Label 500\pt_lp500.ini"
   
5. LX3000: "C:\ProgramData\PTI\Drivers\Color Label 3000\pt_lp3000.ini"
   

; BLOOM COMPENSATION
; #Black pixels to remove
BloomComp = 2 (default)

Increase the BloomComp value to remove more pixels - Decrease to add pixels. Typically you will need to increase the value but you may have to experiment with this setting.

Save the file when you are finished.