In permanent hair dyeing, what is the role of ammonia?
Correct answer: C. It opens the hair shaft
- A. It acts as the primary coloring agent
- B. It acts as the oxidizing agent
- C. It opens the hair shaft
- D. It neutralizes the dye
Explanation
In permanent hair dyeing, ammonia plays a crucial role by opening the hair shaft. This allows the dye to penetrate deeply into the hair, providing a long-lasting color change. Ammonia is not the coloring agent itself, nor does it act as an oxidizing agent or neutralize the dye. Instead, its primary function is to alter the hair structure to facilitate the dyeing process.
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About Industrial Chemistry
Industrial chemistry applies chemical reactions and material properties to the manufacture of adhesives, dyes and polymers. Coverage includes addition and condensation polymerisation, thermoplastics and thermosetting polymers, the structural basis of colour in dyes, and how adhesive composition enables bonding between surfaces.
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