The printing of the packaging and the affixing of labels constitutes the last operations carried out by the packaging manufacturers before sending to the brand owners.
Poor mastery of these operations can lead to batch rejections (material waste) or other problems such as the problems of interactions containing content associated with printing inks.
Has the material manufacturer tested printing processes? If so, which ones, under what conditions? did they require prior surface treatments?
Does the manufacturer of the finished packaging control the entire printing operation until drying (ink cohesion and adhesion, undesirable set-off phenomena)?