Florida Restricted Barber Practice Exam 2025

What is the recommended pH level for shampoo used in a professional barbershop?

1. A pH level below 3.0

2. A pH level between 4.5 to 5.5

3. A pH level above 7.0

4. A pH level between 6.0 to 7.0

The correct answer is: A pH level between 4.5 to 5.5

The recommended pH level for shampoo used in a professional barbershop is between 4.5 to 5.5 because this range closely aligns with the natural pH level of the scalp and hair. Maintaining a pH within this range helps to ensure that the product is effective in cleansing without causing undue stress or damage to hair and scalp. When shampoo is too acidic, with a pH below 3.0, it can strip the hair of its natural oils, leading to dryness and potential damage. Conversely, shampoos with a pH level above 7.0 are considered alkaline, which can lead to frizz and weakened hair structure, as well as irritation to the scalp. A pH level between 6.0 to 7.0, while closer to neutral, may still not provide the optimal balance needed for hair health, as it can be less effective in maintaining the proper condition of the hair and scalp. Thus, using a shampoo with a pH between 4.5 to 5.5 is crucial in a barbershop, as it helps to preserve the integrity of the hair while offering effective cleansing properties, promoting overall hair health and customer satisfaction.