Nail polish has been around for a long time, but new formulas and techniques have taken nail painting to the next level. Manicure enthusiasts can now choose from an endless variety of colors and finishes, lasting for weeks.

The polish, which is a type of lacquer painted onto the fingernails or toenails, isn't just for decoration. Painting one's nails is a form of self-expression and, for many, self-care.

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There are two types of nail polish. Classic polish is applied to the nails and air-dried. It lasts for about a week before it starts to chip off, but it's easy to remove at home using polish remover.

Gel polish is applied and then cured under ultraviolet light, which causes the polish to harden into a glossy, chi

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