Kall sealpackagingisacomplexpackage.Itofteninvolvestwofilms, onereverse-printedwiththebrandowner'sgraphicsandasecondthatprovidesthebarriertoprotecttheproductinside.
Thesetwofilmsarethenlaminatedtogethertoproduceasingleinseparableweb.Fromthere, thecoldsealisappliedontheinsidesurfaceofthewebinapatternregistered / alignedwiththegraphicsontheoutsideoftheweb.
Easyenough, butselectingtherighttwofilmsfromthebeginningishighlyimportant.Boththefilmandthecoldsealmustbecompatible.Otherwise, youruntheriskofnotbeingabletounwindfinishedrollsatthetimeofpackaging.Thisisknownasblocking.Anotherriskduetoincompatibilitybetweencoldsealandfilmispoorpackageseals-orevennoseals.
