Alabama Cosmetology Licensing Practice Exam 2025 – Comprehensive All-in-One Guide to Achieve Your License Success!

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Name one common type of chemical used in hair bleaching.

Sodium chloride

Hydrogen peroxide

Hydrogen peroxide is a common chemical used in hair bleaching because it acts as an oxidizing agent that lightens hair color by breaking down the natural pigment, melanin, in the hair strands. When applied during the bleaching process, hydrogen peroxide penetrates the hair shaft and releases oxygen. This action effectively lifts the color, making hair appear lighter. It is often used in varying concentrations, depending on the desired level of lift and the health of the hair.

Understanding the role of hydrogen peroxide in hair bleaching is essential for cosmetologists, as it allows for effective and safe application, as well as the ability to anticipate and manage any potential reactions with other chemical processes.

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Alcohol

Ammonia

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