Hi there

I am trying to print a barcode on a tracking label using a Zebra ZT230 device, but the barcode is rendered with artifacts that make scanning it difficult or impossible.

A PDF is generated when a web app (Angular) makes a call to a NodeJS backend service. Once the PDF is generated it is returned and printing is triggered in the browser (Chrome).

The label is generated in a NodeJS service using PDFKit. The barcode itself is generated using bwip-js and then written to the PDF as a raster image.

Here is a photo of the resulting barcode when printed on the ZT230:

For testing and debugging I printed the same label on a different model device and it printed without any of the artifacts:

I wonder if the ZT230 is not trying to "grey scale" the barcode with limited resolution? 

Any suggestions about what I can do to the barcode to make it align with the ZT230's capabilities.

Thanks!