Which product is commonly used to prepare hair for coloring?

Shampoo is commonly used to prepare hair for coloring because it cleanses the hair and scalp by removing buildup, oils, and impurities. This cleansing process ensures that the hair is in the best possible condition for absorbing color effectively. A thorough wash with shampoo allows for the even distribution of the color product, as any residue left on the hair can hinder color penetration and affect the final outcome.

While conditioner, styling gel, and hair masks serve essential roles in hair care, they are not typically used as preparatory products before coloring. Conditioners can leave a film that may prevent the color from adhering properly, styling gels are often used to create specific looks rather than prepare for chemical processes, and hair masks are generally used for deep conditioning rather than cleansing. Thus, shampoo is the ideal choice for preparing hair for the coloring process.