Brush is the tool that artists use to apply ink or paint onto a canvas or any other painting surface.  The brush consists of a number of bristles or hairs, held together with the help of a ferrule that is attached to the handle of the brush. Brushes come in different shapes. The bristles are made from the hair of animals such as boar, squirrel, and badger. Synthetic bristles are also used to make brushes.  Brush is also used for cleaning.