On dyed hair or for a root touch up
Start applying the mixture on roots letting it work for 20 minutes or the necessary time to reach the color of the rest of the hair. Then move the product towards middles and extremes letting it work for other 20 minutes. Rinse with abundant tepid water.

Color and bleach in one step
Colorkey Milenium has a bleacher that lets you lighten the natural pigment of the hair (melanin) up to two tones, which is useful for root touch-ups. Remember that in order to lighten hair that has been dyed you have to use Bleaching Powder.

Extra lightening tones
They let you lighten the natural color of the hair up to four tones and color it in one step. They have to be mixed with Colorkey Super Lighteing Developer in the usual proportion used with Colorkey Milenium. In the area to bleach, the hair has to be natural (not dyed) and it can’t be darker than light brown chestnut.

Sensitivity test
Even though it is not usual, a small number of people can show allergic reactions to some of the components of this hair color. This is why we advise doing the following sensitivity test every time you need to use the product. Clean with alcohol a small piece of the skin at the bend of the arm. Apply on the area a few drops of the mixture of the hair color and the oxidant. Let it work for 60 minutes and then rinse with tepid water. Dry the area and cover it with a piece of gauze. It after 24 hours there is no sign of reddening, irritation or itch you can use Colorkey Milenium.