While many other types of cosmetics have a long history and date back thousands of years, this is not the same story for nail polish. It’s actually a modern invention from the 20th century. In ancient Egypt, they used henna for dying their fingernails and this is definitely not the same as the products we use today.
Most companies use different types of ingredients and chemicals to make nail polish. One of these ingredients is the same for everyone: nitrocellulose. This ingredient is actually liquid but it’s mixed with almost microscopic cotton fragments.