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Young girls like to change the color of their fingernails and toenails to match their clothes. And the most common method is the application of nail polish. Therefore, nail polish is very popular among young girls. And it is used to decorate and protect fingernails and toenails. It is usually produced in liquid form and sold in small bottles and used with a tiny brush. Nail polish hardens and forms colorful coatings on fingernails and toenails several minutes after application. It is resistant to chip and water. Nail polish can last for several days on the fingernails or toenails. And it can be washed away with the nail polish remover which contain the substance that dissolves the nail polish.

The main raw material of nail polish is nitrocellulose. And nitrocellulose is the key factor in manufacturing good nail polish. And nitrocellulose has various viscosities to produce the nail polish with different viscosities. However, nitrocellulose is brittle and it cannot stick to nails well. So other substances are also needed to make high quality nail polish.