Permanent hair colors are sometimes called

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Multiple Choice

Permanent hair colors are sometimes called

Explanation:
Permanent hair color uses an oxidative system that requires a developer to oxidize dye precursors. The alkaline agent, usually ammonia, opens the hair cuticle so pigment molecules can penetrate into the cortex and become trapped as the color develops. This combination produces a lasting result, which is why these colors are described as oxidative tints with ammonia. Temporary colors coat the cuticle and wash out, while semi-permanent colors are non-oxidative and fade with washing; ammonia-free oxidative formulas exist, but traditional permanent color is associated with ammonia.

Permanent hair color uses an oxidative system that requires a developer to oxidize dye precursors. The alkaline agent, usually ammonia, opens the hair cuticle so pigment molecules can penetrate into the cortex and become trapped as the color develops. This combination produces a lasting result, which is why these colors are described as oxidative tints with ammonia. Temporary colors coat the cuticle and wash out, while semi-permanent colors are non-oxidative and fade with washing; ammonia-free oxidative formulas exist, but traditional permanent color is associated with ammonia.

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