10 Print Design Mistakes That Ruin Your Files Before They Get Printed

When we open a customer's print file, we can usually tell within 30 seconds whether it's going to print beautifully or become a headache.

The 10 mistakes below account for 90% of the reprints and delays in every print shop in Colorado. Avoid these, and your job prints right the first time, ships on schedule, and looks the way you imagined.

Whether you're designing in-house or working with a designer, use this as a checklist before you hit "send" to your printer.

Mistake 1: No bleed

What is bleed? Extra artwork extending beyond your final trim edge so that when the paper gets cut, there's no white line at the edge.

The mistake: Designing a business card at exactly 3.5" x 2" with your artwork ending at the edge. When it gets cut, tiny variations mean some cards have a thin white line along one edge.

The fix: Add 1/8" (0.125") of bleed on all sides. A business card should be designed at 3.75" x 2.25" with background artwork extending to the outer edge and important content staying within the inner 3.5" x 2" area.

Every professional print shop will accept files without bleed and charge you a reprint fee when the results aren't what you expected. Adding bleed takes 10 seconds and eliminates the problem.

Mistake 2: Text or important elements in the trim zone

What it looks like: Text placed right at the edge of your design. When the paper trims, some of the text gets sliced off.

The fix: Keep all important text and design elements at least 1/8" (0.125") away from the trim line — inside what's called the "safe zone." On a business card, this means keeping text within the inner 3.25" x 1.75" area of a 3.5" x 2" card.

Same rule applies to logos, phone numbers, addresses — anything you'd be upset if it got clipped.

Mistake 3: RGB color mode instead of CMYK

What's the difference? Your monitor uses RGB (Red, Green, Blue) to display color. Print uses CMYK (Cyan, Magenta, Yellow, Black) ink. RGB has a wider color range than CMYK — meaning colors that look vivid on screen sometimes print duller than expected.

The mistake: Designing in RGB, sending an RGB file to print, then being disappointed when the printed piece looks less vivid than the on-screen preview.

The fix: Convert your file to CMYK color mode before sending. In Photoshop: Image → Mode → CMYK Color. In Illustrator: File → Document Color Mode → CMYK. In InDesign: use CMYK color mode from the start.

Yes, some colors will shift when you convert. That's actually helpful — it shows you what the printed piece will look like BEFORE you print it.

Mistake 4: Low-resolution images

What it looks like: Photos that look sharp on your screen but print blurry or pixelated.

The rule: Print files should have images at 300 DPI (dots per inch) at the final printed size.

The mistake: Grabbing images from a website (usually 72 DPI) and using them in your design. They look fine on screen but print terrible.

The fix: Only use high-resolution source images. If you're using stock photos, make sure they're at least 300 DPI at your intended print size. If you're using your own photos, shoot at highest resolution and don't compress before design.

Quick test: If your image looks pixelated when you zoom to 100% in your design software, it's going to look pixelated in print.

Mistake 5: Fonts not embedded or outlined

The problem: You send us an InDesign or Illustrator file. We open it. Your font isn't installed on our computer. Software substitutes with a similar-but-different font. Your design now looks different.

The fix: Either:

1. Package your file with fonts included (InDesign has File → Package)
2. Outline your fonts (convert type to shapes — no font dependency)
3. Send a print-ready PDF with fonts embedded (usually the default when exporting PDF)

Best practice: send print-ready PDFs, not native design files.

Mistake 6: Wrong file format

What we prefer:

• Print-ready PDF (best for most print jobs)
• High-res TIFF or JPG (fine for image-based prints like posters)
• Native files with linked assets (InDesign, Illustrator, Photoshop) — only if you package them properly

What causes problems:

• Word documents (Word isn't a design tool; rendering varies between machines)
• PowerPoint files (not designed for print output)
• Screenshots of designs (low resolution, missed bleed)
• Web-optimized JPGs (compressed for web, not print quality)

Mistake 7: Ignoring paper color for design decisions

The mistake: Designing a business card with a beige background, forgetting you're printing on white cardstock. Or designing bright white text expecting it to print on cream paper.

Reality: Print on white cardstock = your design colors get white behind them. If you designed something intended to be beige, it needs to be printed as beige ink, not left blank hoping it inherits the paper color.

The fix: Every color in your design must be an actual ink color, not a color you're relying on the paper to provide.

Mistake 8: Underspecified rich blacks

The mistake: Using "pure black" (100% K only in CMYK) for large black areas. Result: the black looks washed out, sometimes even brownish.

The fix for large black areas: Use a "rich black" — a black that includes some cyan, magenta, and yellow along with the black ink. Standard rich black recipe: 40C 30M 30Y 100K. This produces a deeper, richer black.

Exception: For small text (under 12pt), use pure black (100K only). Rich black on tiny text causes registration issues where colors can slightly misalign.

Mistake 9: Files sized wrong

The mistake: Designing your business card at 4" x 3" because it "felt right" — but the standard business card size is 3.5" x 2". Result: you get a card printed at your custom size, which is smaller than a standard card slot and looks weird in most cardholders.

The fix: Design at standard sizes unless you have a specific reason not to:

• Business card: 3.5" x 2"
• Postcard: 4" x 6", 5" x 7", or 6" x 9"
• Rack card: 4" x 9"
• Letterhead: 8.5" x 11"
• Poster: standard poster sizes (11"x17", 18"x24", 24"x36")

Custom sizes have their place (event tickets, hangtags, unusual displays) but ONLY when standard sizes truly don't work.

Mistake 10: Not proofreading

The most common mistake in the industry: typos discovered after the entire order is printed.

Spelling errors, wrong phone numbers, wrong dates, wrong website URLs — these are unfixable once printed. And they're painfully common because we all become blind to our own writing.

The fix:

1. Print a physical proof and hand-check before ordering the full run
2. Have someone else read it — new eyes catch what you miss
3. Verify all numbers — phone, address, dates — call the phone number, look up the address, confirm the dates
4. Read the URL slowly, character by character — including whether it's .com, .co, .net, .org
5. For events, cross-check date + day of week ("Saturday March 15" — is March 15 actually a Saturday?)

One typo can invalidate a $500 print order. Ten minutes of proofreading before ordering saves reprints all day.

The bonus mistake: not asking for a design review

Most print shops (including us) will do a free file review before printing if you ask. We look for the 10 issues above and flag anything that will cause problems. Costs you nothing, saves the reprint hassle.

At CO Print Press, this is included on every job — we open your file and flag issues before we run any ink. It's not a favor; it's just how a good print shop works.

When you're ready to print

We accept print-ready files for business cards, postcards, banners, signs, apparel, and everything in between.

If you have a design already, upload it and we'll flag issues before we print. If you don't have one, hire our design team — we build print-ready files that pass every check.

Have a file question? Contact us. We look at hundreds of files a year — we can spot problems fast.