How do you line a pack shot up with a rebrand?

You photograph the pack once the new label is printed, not with a mockup stuck on. If the rebrand does not touch the package, the wholesaler listing does not need another take. Bring units with the final label, batch included, and set the proofs aside. In Madrid the new brand is launched on the old jar and the shelf looks like another house. You get the front and back of the pack already wearing the new label, for the listing and for the wholesaler.