The principle of color changing cup

The principle of the color-changing cup is mainly based on heat-sensitive color-changing materials. These materials will display different colors at different temperatures. Specifically:

Thermochromic cup. In hot water above 40°C, the heat-sensitive color-changing liquid in the color-changing cup will change color due to the increase in temperature, usually manifesting as a change in color from colorless to colored, or from one color to another.

Cold color changing cup. In cold water below 20°C, the heat-sensitive color-changing liquid in the color-changing cup will change color due to the decrease in temperature, which usually manifests as a color change from colored to colorless, or from one color to another.

The cup changes color when exposed to water. This color-changing principle is not yet popular, but the basic principle is similar to the above, that is, when it encounters water, the color-changing liquid changes color due to temperature changes. 68

The temperature-sensitive materials of color-changing cups are usually printed on the cup body. These materials are heat-sensitive materials with high temperature resistance. They are usually non-toxic, lead-free, and chromium-free, and meet international standards. The design of the color-changing cup usually includes the formation of a sandwich cavity between the inner cup and the outer cup, which is filled with a heat-sensitive color-changing volatile liquid, and the outer cup is engraved with an artistic graphic channel connected to the inner cavity. When hot water is poured in, the heat-sensitive liquid changes color in the cavity and rises into the artistic graphic channel of the outer cup, causing the cup wall to show a pre-designed pattern, thereby providing beauty and artistic enjoyment.