Ammonia has always been used in permanent hair colors to produce more durable colors and allow for more significant color changes. But environmental and health concerns have pushed the hair color technology industry to develop alternative color delivery systems that produce the same lasting results as those that contain ammonia. Lakmé Chroma does not contain ammonia, PPDs or fragrance, so it is gentle on the hair. It is comfortable for sensitive scalps. It’s a gel-cream base that is easy to apply and increases the resistance to washing. This color leaves hair smooth and flexible.