Kentucky Cosmetology State Practice Exam 2026 - Free Cosmetology Practice Questions and Study Guide

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What is a crucial step before applying hair color?

Cutting the hair

Conducting a patch test

Conducting a patch test is essential before applying hair color because it helps determine if the client has any allergic reactions to the dye or its components. A patch test involves applying a small amount of the product on a discreet area of the skin, usually behind the ear or on the inner forearm, and waiting for 24 to 48 hours to see if any irritation, redness, or allergic response occurs. This step is vital for the safety and well-being of the client, ensuring that they can tolerate the chemical ingredients in the hair color.

While cutting the hair, shampooing, or blow drying may be part of the overall hair coloring process, they do not address potential allergic reactions that could arise from the dye, which is why conducting a patch test stands out as a crucial preliminary step.

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Shampooing the hair

Blow drying the hair

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