| 摘要 |
PURPOSE: A functional paper cup is provided to be changed in color and design according to the temperature change of beverages. CONSTITUTION: A functional paper cup is manufactured by the following steps: coloring the outside of the paper with thermochromic dyes; coloring the outside of the paper with high temperature thermochromic dyes; and coloring the outside of the paper with low temperature thermochromic dyes. The design of the paper cup is changed according to the temperature change of the paper cup. |
