The big trend is ammonia free hair coloring with an advertisement for being environmental free, less "HARSH" chemicals, More "NATURAL" and organic, green fresh air, none toxic, etc. the marketing extend so much that it becomes scientifically miss leading fot th general public and hairdresser off course whom the believe anything the brands say and repeat it like they new.
The question is the alkaline replacement  for an oxidation hair dye (MEA) or ethianolamine, monoethianolamine Truly a better alternative?
is it not more toxic and stays in the hair? being also less effective in developing the hair colour, but being as damaging as ammonia to the hair fiber or more  (since it doesn't evaporate)??  I also understand the if one is allergicto hair dye they might as well be allergic to amminia free colours. is this so??
thanks for the response Mariano Hairdresser