Ingredient
Ammonium Hydroxide / Hydrogen Peroxide
Scout's take
Ammonia opens the hair cuticle and hydrogen peroxide oxidizes natural pigment — together they are the harsh chemistry that makes permanent dye work. The combination is a strong skin and respiratory irritant, can cause scalp burns, and is the source of the characteristic dye fume exposure during application.
More from Scout's analyses
Ammonia opens the hair cuticle and hydrogen peroxide oxidizes natural pigment — the harsh chemistry that drives permanent dye penetration. The combination is a strong skin and respiratory irritant and can cause scalp burns. Magic Root is marketed as 'low ammonia' but still relies on this oxidative system.
from the analysis of L'Oréal Paris Magic Root Permanent Dark BrownAmmonia opens the hair cuticle and hydrogen peroxide oxidizes natural pigment. The combination is a strong skin and respiratory irritant and can cause scalp burns.
from the analysis of Dark & Lovely Jet BlackFound in 5 products
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