As you may know, the chemical dye messes up your hair. I will start by explaining you why.The chemical dye are involded in the capillary structure, chemicals open the hair scales in order to make penetrate the the pigments. (picture
here) A lot of applications turns the hair scales difficult to close and therefore the hair becomes increasingly sensitive to external aggressions. The hair is worn ,dry, lose their luster, forked and break.
However,
this is how the natural dye work. Hence the brilliance of the hair. These dye make the hair thicker, stronger and more beautiful.
How to lighten the hair naturally? A friend of mine have already tested a mask with honey and lemon and she loved it. It seems that chamomile and cinnamon also help.
To darken the hair we recommend the walnut powder and black tea.
You've probably heard of henna? You know, the product that is supposed to turn your hair orange? Henna is a plant very effective if you want to turn your hair lighter / blacker / red. You can use the Ayurvedic powders such as Bhringaraj to darken your hair. However, I do not recommend buying these powders on Aromazone because from experience I can tell you they are not terrible ... If you want to make a henna after a chemical dye it is advisable to wait between 2/3 months in order not to have "green" hair. (You can always test it on a forelock before all applications!). I also recommend Khadi hair dye, because I've heard / read a lot of good of it. This brand offers a wide choice of colors.
Be careful when you buy your henna that it does not contain metal salts, nicknamed "sodium picramate" a product used in the "fake henna" that may give you huge itching. Be sure to find a henna of quality. I obviously did not test all the henna but the black henna that I prefer comes from Lush.In order to learn more,
here's a link to the henna bible.