What do the “colored squares’’ on the toothpaste tubes mean?
If you’ve decided to change your favorite toothpaste, only because of an article on the Internet, which contains incorrect information for the colored squares, DO NOT DO IT! The "useful" information about the content of the toothpaste depending on the color of the little square on its tube is misleading, false and deliberately published. It is spread maliciously to confuse you!
The contrasting colored squares, rectangles or strips are a marking (a photo mark, a benchmark) that orientate the machines for mass production of product packages.
There are several such markings in more sophisticated packages, but they are visible only when the package is unfolded. All products, packed by machine, have such signs. The machine performs a specific operation - folding, cutting gluing, when the sign passes through its photocell.
The machine needs the contrasting colors to recognize the border of the foil between the tubes. Any color can be placed, if only it contrasts with the background. The statement that green color indicates products with natural composition, red one – products including medical components, blue color shows a presence of chemicals and black color means entirely chemical composition is a complete nonsense and absurdity. There is no provision, law or manufacturing practice in Bulgaria that includes the use of colored marking (which is entirely printing element) for characterizing the composition of a product.
In order to obtain correct information, every user must read the ingredients listed on the package. All products from the Astera brand are marked according to the International Nomenclature of Cosmetic Ingredients (INCI). Astera toothpastes possess very high quality and are recommended by various dental organizations.