Cause: The resolution of the label file you printed is too low
Solution:
1. Please print the PDF file but not the picture. (most common reason)
Printed PDFs are better quality than photos. If you must use photos, you should use high-quality images.
2. Print density and speed. (most common reason)
Within your printer preferences, you can set your "Density" and "Speed". You can change the density to a larger number, it will help. Please check the article in the How-Tos section about how to adjust density and speed.
for windows, 8-12 is recommended;
for mac 8-14 is recommended
for mobile devices, 6-8 is recommended
3. Page size
Please make sure the label you print is 4*6 inches in size.
If your label is full size (8.5*11), please crop your label using "Take a snapshot" in Adobe Reader. Please check the article in the How-Tos section about how to crop a 4*6 size page
4.Margins
Please make ensure the content takes up the whole label. If there are extra borders, your design may be “shrunk” printed in a smaller size resulting in fade content.
5. Dust or adhesive on the printer head.
Please try to clean the printer head with a clean cloth or alcohol.