China Oral Care Industry Association has published an announcement on its website.

The announcement said: "The color code at the bottom of the toothpaste hose is used to locate and identify the toothpaste when it is filled and sealed. It is called electric eye positioning point in the industry.

Proof: Xie Shengdong?

Toothpaste has no natural and chemical classification, as long as the raw materials used meet the "Specifications for Raw Materials for Toothpaste".

According to industry insiders, in packaging positioning, the commonly used colors of positioning points are red, blue, green and black. "Toothpaste is produced in rolls, and the whole roll of material needs to be processed into a hose. Now it is basically automatic cutting. In the process of cutting, mechanical equipment relies on electric eyes to automatically track, and every time a cursor is tracked, it automatically cuts. Without this cursor, the machine will cut randomly, resulting in different lengths. " So why do most toothpaste tubes on the market have black bar codes printed on the bottom? Insiders explained that black is best sensed. Theoretically, the color of the marker can be any color, but the sensitivity of different electric eyes is different with different equipment involved. In the actual printing process, black is mostly made up of.