The main concern related to oxidative permanent colouring is the risk of irritation and allergic reactions. Hair dye residues ...
Semi-permanent dyes are more durable than temporary ... The natural hair colouring material henna is prepared from the henna plant, giving the hair a reddish-brown colour besides giving it a ...
It depends on the type of henna - brown is safe, while black 'henna' is definitely not safe. Semi-permanent vegetable dyes such as henna are recommended by the NHS as a safe alternative if you do not ...
so that the room is ventilated Rinse off the dye thoroughly once the time is up Semi-permanent pure vegetable dyes, such as henna, are thought to be the safest types of dye. Highlighting your hair ...