Barber State Board Exam Complete Practice Test

The first step in removing metallic dye from hair is the application of 70% alcohol, which is commonly used for this purpose due to its effectiveness in breaking down and dissolving the metallic components in the dye. The concentration is important as it is strong enough to penetrate the hair shaft and facilitate the removal of the dye without causing excessive damage to the hair itself.

While higher concentrations of alcohol, such as 90%, may seem like they would be more effective, they can also be more drying and harsh on the hair, potentially leading to more damage. Similarly, lower concentrations, such as 50%, may not be strong enough to effectively dissolve the metallic dye. Vinegar, while sometimes used for hair treatments, does not have the same efficacy in addressing metallic dye residues. Therefore, 70% alcohol strikes a balance between effectiveness and minimizing hair damage, making it the recommended first step for this procedure.