What is changing
Retailers are equipping checkouts to read 2D codes such as GS1 DataMatrix and QR codes carrying a GS1 Digital Link. These hold the GTIN plus batch, expiry and other data in a small space.
Static versus dynamic
A static 2D code can be part of the printed artwork. Adding batch and date makes it dynamic — it must be printed on the line, which is a coding task.
Printing requirements
Dynamic 2D codes need higher resolution and tighter process control than a date code. Laser, TIJ and TTO are the usual choices; CIJ can print them at lower densities.
Verification
Because the code will be scanned at the checkout, inline cameras should confirm that each one decodes and meets grade.
