Unfortunately, things can go wrong with a PDF file, even with the best intentions.
Here are the top 10 features of problematic PDFs:
Placed image resolution too low
- Fonts not embedded
- Wrong colour space assigned
- Incorrect trim or bleed information
- Inconsistency with native file (hairlines, gradients)
- Spot colour misnamed or converted to process
- Too much compression (artifacts, quality loss)
- Incorrect page size information
- Transparent object issues
- Incorrect or missing ICC profile