The pencil “lead” is actually a mixture of graphite and clay. More clay in the mixture makes the lead harder. A harder lead has a higher number. Pencils are numbered from 1-3 but most people use a ...

The eraser was then added in 1858 by Hymen Lipman who patented the idea. Creating different hardness' to pencils was discovered by Nicholas Jacques Conté. Mixing powdered graphite with clay and ...

Meet the Pore Eraser Trio: Pore Eraser Clay Mask. Draws out dirt, oil, and impurities to unclog pores Pore Eraser Toner. Helps tighten pores and refine skin texture Pore Eraser Moisturizing Cream.