QR codes are commonly placed on paper, cardboard, and plastic surfaces. However, they can also be placed on unconventional surfaces like metal, wood, stone, and acrylic. Avoid putting QR codes on shining, wrinkly, reflective surfaces and moving objects, as detecting and scanning these printing mediums QR codes is difficult.

When printed on paper, QR codes are usually applied to flyers, posters, and billboards. Opt for metal for a more durable material. The QR codes are typically printed on metallic tags to withstand damage and ensure long-term usability. In the textile industry, using QR codes on different fabrics is common. Wood and vinyl printing materials are used when incorporating QR codes for more creative and aesthetic purposes.