The major mechanism responsible for the migration of compounds from UV printing inks into foodstuffs is the so-called set-off effect. To assess this effect recently no practicable and acceptable test methods are established. The main compounds potentially migrate from UV printing inks are photoinitiators absorbing UV light due to their chemical structure.
The objective of this undertaking is to establish a fast testing method to estimate the migratory effect the so-called set-off effect from the UV packaging inks onto the inside of packaging materials. This method should be based on the typical UV absorption of photoinitiators.
The results of this study enable the industry producing packaging material affected by the set-off process to assess packaging material which are already established on the market concerning its set-off potential as well as to optimize the development of new printing inks and coatings for outer layers of new packaging materials.