Charcoal sticks are solid pieces of carbonized wood, commonly used in art and drawing. They are made by heating wood in the absence of oxygen, a process called pyrolysis, which removes moisture and volatile compounds. Artists appreciate charcoal sticks for their rich, deep blacks and ability to create a range of textures and tones. In addition to art, charcoal sticks have practical uses in other fields. For example, they can be used in filtration systems to purify water or air. Charcoal is also a key ingredient in activated charcoal, which is used for various health and beauty products.