QR Codes on Business Cards: Size, Quiet Zones, and Why Yours Might Not Scan
A QR code on a business card has one job: someone points a phone at it and lands on your site before the card goes back in a pocket. When that scan fails, the code is not decoration. It is dead space you paid to print. The good news is that scan failures almost always trace back to a handful of measurable printing decisions, and the company that invented the QR code publishes exactly what those numbers are.
If your code has to fit a 3.5-inch card
Start with the module, the single black or white square that makes … Read more at Free Business Cards