This is no ordinary paper. It starts in blue or magenta color. When you place your palm on it, your handprint is left behind in white. What made this change? Thermochromic color science. One side is regular paper that you can write on or even print on. The other side is coated with nontoxic thermochromic ink that loses its color in the presence of heat. When exposed to heat from your hands or another source, the paper turns white until that heat source is gone. This paper is great for illustrating insulators and can be incorporated into a variety of science experiments. Your students will have fun discovering and learning with it. Store the paper away from direct sunlight so its thermochromic effect can be used for years to come.