These small rectangular blocks of colour on the backside of toothpaste tubes, usually referred to as “eye marks,” “colour marks,” or technically “eye-mark sensors,” aren’t meant for customers. 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 crucial for environment friendly and high-speed automated manufacturing. With out them, the method could be significantly slower and extra vulnerable to errors, resulting in potential leakage, inconsistent fill ranges, and elevated manufacturing prices. This automated course of has turn into a regular within the trade, enabling large-scale manufacturing of toothpaste and different tube-packaged merchandise.
