A QR code on a cutting board or a tag is only useful if a phone reads it on the first try. These are the details that decide it.
Reviewed by the Vextrify team, tested in our own laser workshops · Updated · How we test
Try Vextrify freeA scanner has to find the code, separate it from the background and read each module. Give it a blank margin — the QR standard asks for four modules on every side — make the code large enough that each module is clearly engraved, and make sure dark and light parts differ strongly on your material. Then scan a test piece before the real one.
The more characters a code holds, the more modules it needs and the smaller each one gets at the same size. Keep the link short — a short domain path beats a long tracking URL — and the modules stay large and readable. If the code has to stay small, shorten the content first.
Engraved codes have lower contrast than ink, and shiny surfaces reflect, so plan larger sizes than on paper and avoid glossy finishes. On materials where the laser marks light on dark, such as slate or black anodizing, the code has to be inverted; many phone scanners read inverted codes, but not all, so always test with more than one phone.
Vextrify's QR tool sets the edge length from 10 to 160 mm, the quiet zone from one to eight modules, and an Invert switch for light-on-dark materials. It exports a clean SVG or inserts the code into your layout, where it can share a piece with a photo or text. Speed and power for the fill come from your own test grid.
Usually the quiet zone is missing, the modules are too small for the material, or the contrast is weak. Enlarge the code, keep four modules of blank margin, and test-scan first.
Larger than on paper, because engraving has less contrast. Shorten the content to keep the modules big, and test on your material.
Yes, as an inverted code, because the mark is light on a dark surface. Test with several phones, as not every scanner reads inverted codes.