Considerable of the coloring matter is washed off loosely, but enough is taken up by the capillary tubes to dye the hair.' The ammonia may be omitted, and a weak solution of the hydro-sulphuret of ...

Among such substances, Ammonia and its byproducts ... P-phenylenediamine (PPD), One of the most common ingredients in hair dyes, is known for causing severe allergic reactions and potentially ...

These semi-permanent hair dyes are perfect for switching up your ... this vegan formula is 100% ammonia-free, suitable for all hair types and has been proven to significantly reduce allergic ...

Touch-up greys, knock out brassy tones or enrich your colour with six shades of nourishing hair dyes (free from damaging chemicals like ammonia) and all the tools you need to do it. Words by Gitika ...