Erasable ink is a type of ink that can be easily removed from paper using an eraser. This ink is commonly found in pens designed for writing and drawing, allowing users to correct mistakes without leaving smudges or marks. The ink typically contains special compounds that enable it to be erased cleanly. The most popular brand of erasable ink pens is Pilot FriXion, which uses a unique thermosensitive ink. When exposed to heat, such as from friction caused by rubbing with an eraser, the ink becomes invisible. This feature makes erasable ink a favorite among students and professionals who value neatness in their work.