Q. How do you make use of the magic pen?

Answer

It's easy to play around with a magic pen by just scattering objects of various hues throughout dwelling. To write one uses a Magic Marker which is a special kind of pen with a thick fiber at the end. Writing on whiteboards and flip charts using a magic marker is a common practice. When they dry all of the enchanted inks blend into the background. The developer solution contains a chemical that reacts with the magic ink causing it to change color and become visible. There is a unique chemical reaction at work in each type of ink and developer. dye that is transparent in an acid but fluorescent pink in a base is called phenolphthalein.