Surely among us, everyone has wondered about the small colored line at the end of the tube of toothpaste, cosmetics… So what is the meaning of those colored lines and how do they affect the use process? or not?
I decided to find the answer with enthusiastic help from Professor Google. First, I found information that those color lines are called “color codes ” and based on those colors, people divide products into categories as follows:
It sounds pretty… logical, right? However, I now have many questions in my head such as: What about the white line? Why is toothpaste all natural? The package has a black line, is it made from 100% chemicals?
Fiction!
So what do those colored lines really mean? The answer turned out to be very simple: that colored line is for marking!
This colored line is called the Eye mark (or Eye spot). In the production line, tubes are usually sealed at one end, the other end is left open to pump the product in. Then, thanks to the above points, the machines can accurately seal the other end in a very short time. The device used to detect these eye points is often called the Eye mark Sensor . You can watch the video below to understand how they work:
As we have seen, the above machines use light sensors and laser lights to recognize eye spots, so if the packaging is mainly white, the eye spots must have a different color, eg black, blue… to avoid the possibility of mis-cutting the product. This is also the answer to why the eye points have different colors.
Hopefully, through this article, you will have a more basic knowledge but very few people pay attention. At the same time, please consider and evaluate information on the internet carefully, do not become a victim of false rumors!