The color bar at the end of the facial cleanser tube is the positioning point of the electric eye.

the "electric eye positioning point" is used for automatic filling of the hose after the product is manufactured and positioning sensing of the tail sealing machine. After the product is filled in the hose, the machine will automatically seal the hose when it senses the color point.

not only facial cleanser, toothpaste, body lotion, shower gel and other daily chemical products, but also various color marks can be found on the bottom of the reverse side of daily necessities packaged by hoses.

commonly used are red, blue, green and black, which are used to ensure that the printed page is centered when closing the tail. Theoretically, the color of the cursor can be any color, but it involves different equipment and different electric eyes, which will lead to different yield. Therefore, in the actual printing process, black is mostly used as the standard color, because black is the best sensor.

this is very common in printing hose packaging, and has nothing to do with the composition of the product.

Extended information:

Function of "electric eye anchor point":

1. Mark the cutting position: In the process of producing facial cleanser tubes, the machine needs to cut a large piece of material into the size of individual facial cleanser tubes, and the electric eye anchor point marks the cutting position. Every time the machine tracks a positioning point, it will automatically cut it.

2. Marking of pattern alignment of facial cleanser tube: After the paste filling is completed, the final packaging procedure is reached. If there is no anchor point, the machine can't identify the tail of the facial cleanser tube, which will cause confusion in the printing pattern of the tube body; At the same time, it is impossible to complete the automatic packaging procedure, and ensure the consistent packaging position of the whole batch of products.

3. A detection mark of electric eye quality inspection: the product will pass through an electric eye quickly on the production line, and the machine will also check whether the position and pattern are correct by locating points.

People's Daily Online reported that the color code at the bottom of the toothpaste tube represents the ingredients of toothpaste.

Phoenix Online -failed: Can't you brush the black bar at the bottom of the toothpaste tube? The color code is the positioning point of the electric eye for package sealing.