Extended Data Fig. 3: Effect to label under various light conditions.
From: A water-soluble label for food products prevents packaging waste and counterfeiting
Photograph of the printed QR codes under various lighting conditions. (a) Yellow light condition. (b) White light condition. (c,d) Natural light condition. The printed QR codes are recognized well regardless of light conditions, and they all reflect green colour with only slight variations in hue.
