Toothpaste Tube Coloured Line Mystery

You might have wondered what does the small coloured line present on the bottom end of a toothpaste tube signify, you might have also come across articles in the internet stating that each colour specifies something about the ingredients.

For instance,

Blue -> ⁣natural + medicine

Green -> natural

Red -> natural + chemical composition

Black -> pure chemical

Well folks, ⁣the claim about what these indicators supposedly reveal is completely wrong. They are actually an artifact of manufacturing process, also called as ⁣ ‘color marks’ or ‘eye marks’. ⁣These artifacts are supposed to be read by light beam sensors in order to be typically identified so the high-speed machinery knows where the packaging needs to be folded or cut. All these processes work as a connected unit stream.