What is the principle of a cup that can change color when heated with water?

Temperature sensitive materials are printed on the cup body. The materials used are heat-sensitive materials, which can withstand the high temperature of 320℃, are non-toxic, lead-free and chromium-free, and can reach European standards. According to the design scheme of the design draft, film, plate making, printing, drying, baking and then packaging. The color of the hot color-changing cup changes when the temperature is higher than 40℃, and the color of the cold color-changing cup changes when the temperature is lower than 20℃.

When hot water or cold water is injected into the cup, the color of the cup will change. The colors before discoloration are black, red, yellow, green, blue, brown, purple, light blue, light yellow, light green, reddish, lavender and pink. Including dot effect, can be designed as the surface layer of a color-changing cup. Ceramic color-changing cups and glass color-changing cups can be divided into thermochromism, cold discoloration and water discoloration.

Extended data

Apply a special color-changing coating on the outside of the cup as needed. When the temperature changes, the color-changing layer will become transparent or other colors. When hot water is added, the temperature will be transferred to the outside of the cup. When the temperature reaches above 45℃, the pattern on the side of the cup will change magically. After cooling, the pattern returns to its original state.

Nicholas grew up in a cafe run by his father. In the past 15 years, he has been running many cafes by himself. In his work, he found that there are two reasons why customers get burned by coffee. They underestimated the temperature of coffee. Another reason is that the lid of the coffee cup is not properly covered, which may cause serious burns. Perhaps Nicholas was not the first person to start thinking about this problem, but he realized that it would be a very broad market.

Later, a color-changing material caught Nicholas's attention, and he found that the cover with this color-changing function could solve these two problems well. The cup should be completely sealed when the lid is closed. Once the position is wrong, steam will run out of the gap, and the color of the cover at this position will change accordingly.

Baidu Encyclopedia-Ceramic Color Changing Cup

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