Bleed: print 3mm extra for trimming
Printing happens on a large sheet that's then cut down to the finished size, and the cutting blade has slight variance. If a background color or image only reaches the finished edge, even a tiny misalignment reveals a white paper border. Bleed simply extends the background 3mm outward; after that 3mm is trimmed away the edge remains full-color.
In Taiwan, the common bleed value is 3mm per side and applies to business cards, DMs and posters alike; large-format output or special finishing may need more, so confirm with your printer before sending files.
Safe area: keep important content inset
Keep text, logos and key graphics at least 3–5mm from the finished edge (the safe area) so trimming variance won't clip them. Designs aligned right to the edge look crisp but are risky — always leave a safe margin.
Final artwork size = finished size + 3mm bleed on each side. For example, a 9×5.4cm business card should be supplied as 9.6×6.0cm with trim marks indicated.
FAQ
- How many mm of bleed should I leave?
- In Taiwan, generally 3mm of bleed per side. Final artwork size = finished size + 3mm on all four sides.
- Why does my finished piece have white edges?
- Usually because there was no bleed. The background didn't extend past the trim line, so cutting variance reveals the paper white. Extending the bleed by 3mm prevents this.