Referring again to our blog on printing quality barcodes, we also mentioned that printer choice impacted readability.
Inkjet-printed labels might smudge on rainy days. Inkjets also often tend to make fuzzy images. For barcoding, other office printer types are preferred.
When used on the wrong facestock, wax ribbons tend to produce smeared or easily fading graphics. They are better used on uncoated paper. To make durable labels, use resin-containing ribbons on plastic, latex-reinforced or fabric facestock.
Direct thermal printers with the wrong resolution can render these ciphers unreadable. You can use a 203- or 300-dpi device on most retail barcodes, but smaller ones need a 600-dpi resolution.