If you’ve ever gotten that call from your printer asking about a file issue when you thought everything was perfect, you’re not alone. Our print techs consistently see the same handful of problems and the frustrating part is most of them take just a few seconds to prevent.
The good news is that most of these issues are easy to avoid once you know what to look for. Here are some of the most common pitfalls we see every day, and how you can steer clear of them.
File Prep Pitfalls We See All the Time
Incorrect Crop Mark Offset
InDesign’s default crop mark offset is set at .0833″. Since this is smaller than the standard .125″ bleed, the crop marks end up inside the bleed area instead of outside it. This makes trimming less accurate and can interfere with artwork that’s meant to extend to the edge of the page. Setting the offset to at least .125″ ensures crop marks land outside the bleed and align correctly during cutting. (For more on bleeds and margins, check out our Recommended Page Margins and Bleeds guide).
Missing or Incorrect Bleeds
If your design has color, photos, or graphics that run all the way to the edge of the page, it needs a bleed. A bleed is extra space (usually 0.125″) that extends beyond the trim edge, so when the piece is cut down to size, there are no unwanted white gaps at the borders.
It’s also important to make sure that bleed is included when you export your PDF. If the file is saved at the trim size without bleed, the printer won’t have enough information to trim it correctly, which may require extra adjustments. Double-check your export settings so the bleed area comes through. (Need help setting up bleeds? See our Recommended Page Margins and Bleeds guide).
Text in RGB Black
Black text should always be set up in CMYK, not RGB. RGB is for screens, and while it looks fine on your monitor, it can print out looking fuzzy or dull. Switching your text color to CMYK black ensures sharp, professional-looking results. (Learn more in our RGB vs CMYK guide).
Fonts Not Embedded
If fonts aren’t embedded in your file, there’s a chance they won’t display correctly when opened. Missing fonts get substituted, which can change the look of your project in ways you might not expect. Always embed fonts to keep your design intact. (Our Prepress Checklist covers this step and more.)
For perfect bound books, margins should be at least .5″ to keep important content from disappearing into the binding. Too-tight margins risk cutting off text or images once the book is assembled. (See our guide on Choosing the Right Binding Type to help plan your layout.)Live Data in the Punch Area
If you’re planning to add holes or other cuts, make sure no critical information lands in that space. Content in the punch area can get lost or become unreadable. Be sure to discuss what your “safe zone” is with your Project Manager for your specific project.
When you open any printed book, the very first page you see on the right is page 1. That means all odd-numbered pages typically appear on the right-hand side and even-numbered pages on the left. This rhythm continues throughout the book and keeps everything in sequence. If files are set up so the numbers land on the wrong side, the layout feels off once the book is bound. For example, a “Chapter 1” title page should appear on the right, not the left. If you want every chapter to begin on a right-hand page, you may need to insert a blank page at the end of the previous chapter to keep the flow consistent.
Project Setup & Communication Issues
Unclear File Setup
Sometimes projects are put together in a way that only makes sense to the person who built them. If someone new can’t follow the file structure, extra time may be needed to clean it up or reorganize before production can begin. That adds both time and, in some cases, cost. A good rule of thumb is to set up your project so that anyone unfamiliar with it can still understand how it’s built.
Unclear Deadlines
Clear timelines are just as important as clean files. If a deadline changes, your project manager needs to know right away so they can adjust schedules and priorities. Without that update, it’s easy to assume the project isn’t urgent anymore, which can cause a scramble if a new rush deadline suddenly appears. Sharing your timelines, and updating them as they shift, helps your project stay on track and keeps the process stress-free for everyone involved.
Not Flagging Cleanup Needs
If you know your files need extra cleanup, let your printer know upfront. It’s not a problem — they’ll help — but being transparent about the level of work needed makes it easier to budget time and resources effectively. The more information your project manager has at the start, the smoother things will run later.
Why These Details Matter
Little mistakes in file prep or communication don’t always seem like a big deal, but they can create a ripple effect once production starts. A missing font or unclear deadline might only take a few minutes to fix on its own, but multiplied across a project, it adds up to extra time, cost, and stress.
Clean files and clear communication give your printer a head start. It means they can focus on producing your materials quickly and accurately, instead of troubleshooting or guessing what you intended. The result is a smoother process, fewer surprises, and finished pieces that look the way you imagined.
In the end, a little extra attention at the beginning saves hours of rework later — and that helps everyone stay on schedule and on budget.
How to Set Your Project Up for Success
A little preparation goes a long way toward keeping your print project on schedule. Here are a few habits that make the biggest difference:
- Double-check file settings before sending. Make sure crop marks, margins, and color settings are correct, and that fonts are embedded. Our Prepress Checklist has step-by-step guidance if you’re unsure.
- Use clear file and folder names. Organized files make it easy for anyone to understand the project and reduce the need for guesswork.
- Communicate deadlines clearly. Let your project manager know not just the final delivery date, but also when you plan to send files — and update them if that changes.
- Be upfront about cleanup needs. If you know files aren’t quite ready, a quick heads-up helps your printer plan the right level of support.
- Ask questions early. If you’re not sure about a setup detail, it’s always better to ask in advance than to fix later. (You can always contact Omnipress with questions.)
These small steps may feel simple, but they’re the foundation of a smooth production process.
Wrapping It Up
Every print project has a lot of moving parts, and it’s normal for small hiccups to happen along the way. But many of the most common issues are also the easiest to avoid with a little planning. Clean files, clear communication, and a quick double-check before you send everything off can save time, money, and stress.
Your printer wants your project to look its best — and so do you. By avoiding these pitfalls, you’ll help ensure a smoother process and a finished piece you can be proud of.
Want more detailed guidance? Explore our Prepress Knowledge Base for step-by-step tips on everything from margins and bleeds to file formats and binding. Or, learn more about our Conference Printing Services and Training Materials Printing to see how we can help bring your next project to life.
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