Useful materials
How to print QR codes: size, quality and scan distance
Screen files ≠ print files. Match size to distance and always test a proof.
Screen vs print
A small QR on a phone works fine — on a distant banner the same file may fail. Think about scan distance before print.
Format
PNG
Digital / quick use.
SVG
Print and large formats — scales without raster blur.
Distance and size
Business card = close. Banner = far. Size must match the real scenario. Do not shrink then stretch — export at the right size.
Contrast and proof
Gloss, photos and busy backgrounds hurt scanning. Proof-print, test with a phone, then run the full batch.