What is the required method for applying hair color?

The correct method for applying hair color involves the use of damp hair as it helps in achieving even distribution and optimal penetration of the color. When hair is damp, the cuticle layer of the hair shaft is slightly raised, allowing the color molecules to better enter the hair and result in a more uniform application.

Applying color to dry hair can lead to uneven results and difficulty in spreading the product, as the color might not adhere as well to the cuticle in this state. Towel-dried hair is the most common recommendation because it strikes a balance between having enough moisture to aid in application while still allowing the color to penetrate the hair effectively. Therefore, the technique of using damp hair enhances the overall effectiveness of the coloring process, leading to more satisfactory results.