Therefore, scientists can assume that there is no pollution in theory, because the heat-sensitive liquid is in the inner layer of the cup and does not contact with the beverage in the cup. But the cup is fired, it will not be completely sealed, it will cause leakage, and it is unknown whether the molecular size of the heat-sensitive liquid will pass through the micropores. It is recommended to use water cups without chemical raw materials, and white embryo cups are the best. To know this problem, we have to start with the color-changing principle of the color-changing cup, which is actually the principle of thermal transfer technology.
At present, there are three kinds of color-changing cups on the market: 1. Thermal color-changing cups (the most common), as the name implies, will begin to change color when exposed to hot water of more than 40 degrees, showing a printed pattern.
2. Color-changing cups in contact with water (few at present), that is, they change color in contact with water, which of course refers to low-temperature water instead of hot water.
3. Cold color-changing cups (few at present), which change color when the temperature is lower than 20 degrees Celsius.
In fact, whether it is hot or cold, the principle of color change is the same, but the materials that are sensitive to temperature are different! First of all, let's understand the principle of the color-changing cup.
The reason why the color-changing cup changes color is inseparable from its unique structure. The color-changing cup consists of an outer cup and an inner cup which are coaxially arranged, and an inner charge is arranged between the bottom ends of the two cups.
The outer side wall of the inner cup is engraved with an artistic graphic channel communicating with the inner cavity. After the drinking cup is filled with hot water, the water in the interlayer cavity
The heat-sensitive liquid will change color and escape from the graphic channel of the inner cup, so that the cup wall presents artistic patterns, which makes people get aesthetic feeling and artistic enjoyment. Therefore, the color changing cup
Color change lies in this heat-sensitive coating structure, and the color-changing cup is completed inside the cup wall, which is a pure natural physical reaction, non-toxic and harmless.
Interesting plaything. Because the temperature-sensitive materials used are printed on the cup, the materials used belong to imported high-quality temperature-sensitive materials, which can resist high temperature of 320 degrees Celsius, and are non-toxic and lead-free.
Chromium-free, can meet the European food FDA standards. At the same time, the heat-sensitive material is completely isolated in the inner layer of the cup, which is completely out of contact with the beverage in the cup and will not cause pollution.
It is a completely closed space, and the heat-sensitive material can't get out, so it can be used for unlimited times. Due to the technical breakthrough, the current color-changing cup is color-changing.
The scope is constantly expanding: black color changing cup, red color changing cup, blue color changing cup, green, brown, purple, light blue, light yellow, light green, reddish, lavender, including dot effect,
It is said that the black color changing cup technology is mature and the effect is the best!