Why does the FDA accept temporary colors as certified colors (which do not require a patch test)?

Why does the FDA accept temporary colors as certified colors (which do not require a patch test)?

• A. They require patch test.
• B. They are always safe.
• C. They add pigment without chemically altering the structure of the hair.
• D. They change the natural hair pigment permanently.

Answer: (C)

Temporary colors work by depositing pigment on the hair’s surface without penetrating or chemically changing the hair shaft. Because they sit on the cuticle and don’t react with hair proteins or melanin, they don’t create lasting chemical alterations and aren’t considered to require a patch test for sensitization. This superficial, non-permanent deposition is why the FDA accepts them as certified colors without patch testing. The other statements don’t fit: patch tests aren’t mandatory for every color; no color is universally safe; and temporary colors do not permanently change natural pigment.

Temporary colors work by depositing pigment on the hair’s surface without penetrating or chemically changing the hair shaft. Because they sit on the cuticle and don’t react with hair proteins or melanin, they don’t create lasting chemical alterations and aren’t considered to require a patch test for sensitization. This superficial, non-permanent deposition is why the FDA accepts them as certified colors without patch testing. The other statements don’t fit: patch tests aren’t mandatory for every color; no color is universally safe; and temporary colors do not permanently change natural pigment.