Which of the following best describes the terminology used for permanent hair color?

• A. Oxidative tints with ammonia
• B. Direct dye
• C. Temporary color
• D. Demi-permanent color

Answer: (A)

Permanent hair color is defined by an oxidative process that changes the dye molecules and bonds them in the cortex. To enable that chemical reaction and color deposition, an alkalizing agent like ammonia is used to lift the cuticle. That combination—an oxidative reaction plus ammonia—describes how permanent color works, so the term oxidative tints with ammonia is the most accurate label.

Direct dye is non-oxidative and sits on the surface, fading quickly. Temporary color also coats the cuticle and washes out after a few shampoos. Demi-permanent color uses a milder developer and doesn’t lift as much, so it’s not considered permanent in the same way.