Common Printing File Mistakes & How to Avoid Them

Computer screens display images at 72–96 DPI. Print requires at least 300 DPI at the final printed size. An image that looks perfectly sharp on a monitor can print as a soft, pixelated mess because it simply doesn't have enough pixel data for the printer to work with.

Common sources of low-res images: screenshots, images downloaded from websites, social media profile pictures, small logos pulled from email signatures, and images that have been scaled up in the design software to fill a larger space than they were created for.

When your design has color, a photo, or any element that extends to the very edge of the finished piece, you need bleed — extra artwork that extends ⅛″ past the cut line on all sides. Without it, a tiny shift in the cutting machine leaves a sliver of unprinted paper visible along the edge.

This is especially noticeable on business cards and postcards with dark or colored backgrounds. Even a half-millimeter shift produces a visible white line against a dark background.

Even with bleed set correctly, text, logos, or phone numbers placed too close to the trim line risk being partially cut off. Cutting machines have a small tolerance — usually about 1/32″ — and content that sits right on the boundary can end up visibly clipped or uncomfortably close to the edge.

RGB is the color mode for screens (Red, Green, Blue light). CMYK is the color mode for print (Cyan, Magenta, Yellow, Black ink). RGB can display a wider range of vivid colors — some of which CMYK inks physically cannot reproduce. When an RGB file is converted to CMYK for printing, those out-of-gamut colors get mapped to the nearest printable equivalent, which often looks duller.

The colors most affected: electric blue, bright green, neon pink, and vivid purple. Earth tones, dark colors, and desaturated colors generally convert without noticeable change.

If your file uses a font that isn't embedded in the PDF or outlined in the design file, the printer's software may substitute a default font. This changes your layout — text reflows, line breaks shift, and the design no longer matches what you intended. In some cases, missing fonts display as empty boxes or placeholder characters.

A screenshot of your design is not the same as your design file — it's a 72 DPI image capture of your screen, regardless of how high-quality the original design was. Similarly, images downloaded from websites are optimized for fast loading on screens, not for print quality. Sending a Canva share link, a Google Slides deck, or a working Illustrator file with live text and missing linked images also causes problems.

If you're ordering 4″ × 6″ postcards but your file is set up as 5″ × 7″, the printer has to either scale or crop your design to fit — and the result rarely matches what you had in mind. This also happens when the bleed-inclusive document size is confused with the finished trim size (e.g., sending a 3.5″ × 2″ file for a business card when it should be 3.75″ × 2.25″ with bleed).

Rich black (C60 M40 Y40 K100) layers all four ink channels to produce a deep, dense black — great for large backgrounds and headers. But for small body text, those four ink layers need to align perfectly. Even a tiny misregistration causes a visible color fringe around each letter, making the text look fuzzy or slightly out of focus.

Design software uses transparency effects (drop shadows, opacity changes, blend modes) that need to be "flattened" during export to render correctly in print. If these effects aren't properly flattened, they can print as solid blocks, white boxes, or unexpected artifacts.

This isn't a technical file issue — it's a human one. Typos, incorrect contact information, outdated logos, and design errors make it through to print simply because nobody did a final review of the exported file. The cost of reprinting is always higher than the time it takes to proofread.