Several reasons may cause your hair to take up colour unevenly. You may have applied the colouring agent improperly, residual pigments in your hair may skew the resulting hair colour, traces of styling products were still in your hair or your hair structure is uneven. Whatever the reason fast action is the order of the day.
Dare to Change Your Hair Colour
Before you colour your hair again, you should wash your hair using a peeling shampoo. Then treat your hair to a nourishing cure to repair structural damages to your hair. For the new colour treatment use the same product as before. If you use a darker colour you should reduce the leave-in time to gradually even out colour differences.
The Dark Side
What happens when regularly dyed hair gets darker with every colour treatment? In case of an intensive tinting or permanent colouring application you should first apply the hair colour to the new hair growth and then only for the last few minutes to the entire hair. Rinsable tinting applications should actually have been washed out before applying new colour. This prevents an accumulation of pigments toward the hair ends.
By the way, the ends of longer hair tend to be more porous and therefore take up higher concentrations of pigments. You should therefore apply hair colour first to the new hair growth and only for the last few minutes to the hair ends. It also helps to treat the hair ends of long hair to regular intensive cures. These cures are essential to assure even colouring results.
The Short Haircut Solution
Admittedly, this is a radical solution for only the most serious colour mishap. Still, cutting your hair is very effective in case the hair ends have taken up more pigment than the rest of the hair. This frequently happens to split or porous hair ends. Cutting off the hair ends restores the health of the hair and guarantees even colouring results.
Solution of Last Resort
All this is far too much trouble for you? A visit to your hair stylist can save you from further hairy debacles. In case of doubt, your hair stylist can put some streaks into your hair to distract from the uneven colouring results.