Thermosensitive dye is a kind of microcapsule pigment, which can change color repeatedly with the increase or decrease of temperature. When the temperature is high, the pigment will change color, and when the temperature is low, it will return to its original color. Therefore, if the pattern on the rice bowl will change color when it meets hot water, it may be due to the role of this temperature-sensitive dye, not the bowl itself.
Therefore, if you want to choose a bowl with health-preserving function, you may need to look for other materials with related functions, instead of judging whether it is a health-preserving bowl only by the color change of the pattern on the bowl.