The coloured sq. discovered on the sealed finish of toothpaste tubes has been the topic of varied interpretations. Common on-line myths counsel these squares point out the composition of the toothpaste, with completely different colours supposedly representing various ranges of chemical versus pure elements. This assertion, nonetheless, lacks validation from credible sources and is essentially thought of to be misinformation.
The colour marking serves a purposeful objective inside the manufacturing course of. It acts as a watch mark, permitting optical sensors to establish the top of the tube throughout filling and sealing. This ensures that the tube is correctly lower and sealed on the appropriate location, sustaining effectivity on the manufacturing line. The particular coloration used is usually decided by elements equivalent to distinction with the tube’s packaging design.