How to best apply the label?

The labels adhere best to flat, smooth and grease-free surfaces. Be sure to thoroughly clean the surface to which you want to affix the sticker before use.

To avoid misunderstandings or problems when reading the QR Code, you should also pay attention to where you attach the labels. Avoid placing them next to other QR Codes or barcodes. For more information, please refer to the existing question: Where do I best put my sticker?.