Nail polish is a lacquer that can be applied to the human fingernails or toenails to decorate and protect the nail plate. The formulation has been revised repeatedly to enhance its decorative effects and to suppress cracking or flaking. Nail polish consists of an organic polymer with various additives.
Traditionally, nail polish started in clear, red, pink, purple, and black. Since that time, many new colors and techniques have developed, resulting in nail polish that can be found in an extremely diverse variety of colors. Beyond solid colors, nail polish has also developed an array of other designs, such as crackled, speckled, iridescent, and holographic; rhinestones or stickers are also often applied. Some types of polish are advertised to cause nail growth, make nails stronger, prevent nails from breaking, cracking and splitting, and to stop nail biting. Nail polish may be applied as one of several components in a manicure.