Good practices and adhering to the generic barcode printing guidelines will alleviate most of the issues that can occur. Below are illustrations of some of the issues that you might encounter and some advice on how to prevent them.
Creased labels cause great difficulties when trying to read them. Creasing is generally caused by human error when hand labelling. Creasing can also be caused by uneven and contaminated surfaces, so you should always check the condition of the surface you're applying to.
Creased labels are common in automatic corner wrap applications.
Look for best consistent area on your packaging to apply labels.
Automated print and apply will give uniform application, improved efficiency and cost savings.
2 Labels on 2 adjacent faces. Better application, better print and more options.
Printing a barcode in ladder format – the wrong orientation will result in fussy trailing edges on the bars. This makes reading more difficult and will reduce overall grades when checked with a verifier.
Printing barcodes in the wrong orientation can cause excessive wear of printheads.
Barcodes should be printed in a 'picket fence' orientation, not a 'ladder' as shown in the picture to the left.
This assumes the label in the image is printed narrow edge leading.