How does Crayola Color Wonder work?

Описание: Crayola has patented their secret recipe for the ink used in the Color Wonder collection.

But we know that the ink is a colorless leuco dye that changes to color in the presence of acid. The substrate in the Color Wonder paper contains zinc ions which trigger the development of color in the dyes when the marker inks are applied.

Think of litmus paper and universal indicators.

#crayola #science



credits 📹 Natalia Be Be