Quick answer: A print-ready business card file needs three things: a 3mm bleed extending past the trim edge on all sides, colours set in CMYK (not RGB), and a resolution of at least 300 DPI at final print size. Getting any of these wrong is the most common reason business cards come back with white edges, dull colours, or blurry text.
If you’ve ever received a printed business card that looked noticeably worse than it did on screen — faded colours, a stray white edge, or slightly blurry text — the file almost certainly wasn’t properly prepared for print. Here’s what each of these terms actually means and how to check your file before sending it off.
Bleed: Why Your Design Needs to Extend Past the Edge
What it is: Bleed is extra design area — typically 3mm on each side — that extends beyond where the card will actually be trimmed. It exists because commercial cutting isn’t perfectly precise; without bleed, tiny shifts in the cutting process can leave a thin white line along one or more edges.
How to check it: Any background colour, image, or design element that’s meant to reach the edge of the card should extend at least 3mm past the trim line, not stop exactly at it. Text and important details, on the other hand, should stay well within the trim line — a common recommended safety margin is 3–5mm inward from the edge, so nothing important risks being cut off.
CMYK vs. RGB: Why Colour Mode Matters
What it is: Screens display colour using RGB (red, green, blue light), while commercial printers use CMYK (cyan, magenta, yellow, black ink). Colours that look vibrant on screen in RGB often shift and appear noticeably duller once converted to CMYK for printing — this is one of the most common reasons a printed card doesn’t match what was designed on screen.
How to check it: Set your document’s colour mode to CMYK from the start, rather than designing in RGB and converting at the end — this gives you a more accurate preview of the final printed colours throughout the design process, and avoids unpleasant surprises after printing.
Resolution: Why 300 DPI Matters
What it is: DPI (dots per inch) measures image sharpness. Web and social media images are typically optimised at 72 DPI, which looks fine on screen but appears blurry or pixelated when printed at actual size. Print work requires a much higher resolution — 300 DPI — to look sharp on paper.
How to check it: Any images or logos placed in your business card file should be at least 300 DPI at the final print size (typically around 90mm x 55mm). If you’re using a logo file, always use the original high-resolution vector or high-DPI version — see logo vs brand identity: what’s the difference and why it matters for why keeping your original source logo file accessible matters well beyond your website and social media.
A Simple Pre-Print Checklist
- Document set to CMYK colour mode, not RGB
- 3mm bleed added around all edges where design touches the border
- Important text and details kept within a safety margin (typically 3–5mm from the trim edge)
- All images and logos at 300 DPI or higher at final print size
- Fonts embedded or converted to outlines, so text doesn’t shift or default to a substitute font on the printer’s end
- File exported as a high-quality PDF, the standard format most print shops expect
Common Mistakes That Cause Printing Problems
- Designing in RGB and only converting to CMYK right before sending the file, without checking how colours shift
- Forgetting bleed entirely, resulting in thin white edges after trimming
- Using a logo pulled from a website (usually 72 DPI) instead of the original high-resolution file
- Placing text or important details too close to the edge, risking it being cut off during trimming
- Not embedding fonts, which can cause a printer’s software to substitute an unintended font
Working With a Print Shop
Most professional print shops will flag obvious issues (like missing bleed) before printing, but not all of them check thoroughly — it’s worth confirming your file meets these standards yourself rather than assuming it will be caught. If you’re unsure how to prepare the file correctly, it’s often worth having a designer set it up properly the first time; the cost of a reprint from a bad file usually outweighs the cost of getting it right upfront. If you’re briefing a designer for this kind of print work, see how to brief a graphic designer so you get what you actually want for how to communicate exactly what you need.
Frequently Asked Questions
What happens if I don’t add bleed to my business card design? You risk a thin white line appearing along one or more edges after trimming, since commercial cutting isn’t always perfectly precise to the exact millimetre.
Why do my printed colours look different from what I see on screen? Screens use RGB colour, while printers use CMYK ink. If your file was designed in RGB and only converted at the last step, colours — especially bright blues, greens, and some oranges — can shift noticeably once printed.
Is 300 DPI always necessary for print? Yes, for anything intended to be printed at or near its final display size. Lower resolutions (like 72 DPI, standard for web) will appear visibly blurry or pixelated once printed.
Can I use my website logo file for a printed business card? Not usually — website logos are typically optimised for screen display at low resolution. Always use your original high-resolution or vector logo file for any print material.
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