On-the-scalp lighteners have a pH of:

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Prepare for the Pivot Point Level 1 Hairstyling Test. Engage with flashcards and multiple-choice questions, each offering precise explanations. Get exam-ready!

Multiple Choice

On-the-scalp lighteners have a pH of:

Explanation:
On-the-scalp lighteners are formulated to be alkaline, around pH 9.0. This high, basic environment opens the hair cuticle and allows the lightening agents and hydrogen peroxide to penetrate into the cortex where melanin is located, enabling the oxidative reaction that lifts color. If the product were acidic or near neutral, the cuticle would stay closed, diffusion would be limited, and there would be little to no lift with a higher risk of scalp irritation. The around-9.0 pH provides the needed lift while remaining formulated for direct scalp use, which is why this option is the correct choice.

On-the-scalp lighteners are formulated to be alkaline, around pH 9.0. This high, basic environment opens the hair cuticle and allows the lightening agents and hydrogen peroxide to penetrate into the cortex where melanin is located, enabling the oxidative reaction that lifts color. If the product were acidic or near neutral, the cuticle would stay closed, diffusion would be limited, and there would be little to no lift with a higher risk of scalp irritation. The around-9.0 pH provides the needed lift while remaining formulated for direct scalp use, which is why this option is the correct choice.

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