Product Description This wooden-shafted colored pencil features a core made of "Friction Ink," which disappears when rubbed, solidified with wax. The friction generated by rubbing the eraser on the back of the pencil against the paper causes the ink to disappear cleanly. This allows for easy corrections when coloring, such as fixing mistakes that go outside the lines, or in sketching. Because the friction heat makes the marks colorless, there are no eraser shavings, and your desk or table won't get dirty. Please check the second image for usage examples. Thank you for viewing.