When faced with colour banding, the approach to resolve this issue can vary depending on the target colour and the extent of the banding. Porosity is an important factor to consider in this process.
If the goal is to go lighter, one effective solution is to highlight the hair to create a more gradual transition between colours. After highlighting, you can use Dia Light to tone the hair, achieving a more even and blended look.
Conversely, if the aim is to go darker, Dia Richesse combined with an appropriate peroxide can be used to even out the colour and eliminate the banding effect. It’s crucial to choose the right shade and developer to match the desired end result.