These small rectangular blocks of shade on the backside of toothpaste tubes, usually referred to as “eye marks,” “shade marks,” or technically “eye-mark sensors,” usually are not meant for shoppers. They’re used within the manufacturing course of to information sensors that management the place the tube is lower and sealed throughout manufacturing. These marks guarantee constant sealing and trimming, leading to uniformly packaged merchandise.
Constant placement of those marks is important for environment friendly and high-speed automated manufacturing. With out them, the method could be significantly slower and extra susceptible to errors, resulting in potential leakage, inconsistent fill ranges, and elevated manufacturing prices. This automated course of has turn into a normal within the trade, enabling large-scale manufacturing of toothpaste and different tube-packaged merchandise.
