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