Those small colored squares frequently found at the bottom of toothpaste tubes are not mere decorative elements. They are actually registration marks, or “eye marks,” used in the manufacturing process. These marks guide sensors on high-speed packaging machinery, indicating where to cut, fold, and seal the tubes. This ensures consistent packaging and minimizes waste during production.
Accurate and efficient tube sealing is critical for product preservation. A poorly sealed tube can lead to product drying out, contamination, and ultimately, reduced shelf life. Automated processes rely on these marks for precision, enabling manufacturers to maintain product quality and meet consumer expectations for a fresh and usable product. While originally employed for ease of manufacturing, these marks now contribute significantly to product integrity and consumer satisfaction.
