Which option correctly identifies a characteristic of permanent color?

• A. It uses direct dye.
• B. It lasts only a few days.
• C. Oxidative tints with ammonia
• D. It doesn't require a developer.

Answer: (C)

Permanent color relies on oxidative chemistry. Dye precursors enter the hair and, in the presence of a developer (oxidizer), react to form new color molecules that stay in the cortex. An alkaline agent like ammonia is typically included to lift the cuticle so these pigments can penetrate effectively. This combination—oxidative tinting with a developer and ammonia—produces lasting color that remains until the hair grows out or is recolored. Direct dyes, which deposit color without a developer, or products that fade after a few days, are non-oxidative or temporary, and statements claiming no developer are used for permanent color are not accurate.